ArticlePDF Available

Retropluma craverii (Crema, 1895) (Crustacea, Decapoda, Brachyura, Retroplumidae) from the Pliocene of Reggio Emilia (N Italy)

Authors:
Antonio De Angeli at ........................
Antonio De Angeli
  • ........................
Alessandro Garassino at Natural History Museum, Milan
Alessandro Garassino
  • Natural History Museum, Milan
Giovanni Pasini
Giovanni Pasini
Giovanni Pasini
  • This person is not on ResearchGate, or hasn't claimed this research yet.
Download full-text PDF
Read full-text
Download citation

Abstract

We report two specimens of retroplumid crabs from the Pliocene of Reggio Emilia (N Italy), ascribed to Retropluma craverii (Crema, 1895), known to date only from the Pliocene of Pie- monte. The re-examination of the holotype together with the good state of preservation of the studied specimens has allowed a re-description of this species, poorly known to date.
Available via license: CC BY-NC
Content may be subject to copyright.

*


**

***


Antonio De Angeli
*
, Alessandro Garassino
**
& Giovanni Pasini
***
Retropluma craverii
(Crustacea, Decapoda, Brachyura, Retroplumidae)
from the Pliocene of Reggio Emilia (N Italy)
Abstract
Retropluma craverii-


Key words: Crustacea, Decapoda, Brachyura, Pliocene, Italy.
Riassunto - Retropluma craverii-
dae) del Pliocene di Reggio Emilia (N Italia).
-
Retropluma craverii
-

Parole chiave: Crustacea, Decapoda, Brachyura, Pliocene, Italia.
Introduction
Retropluma craverii

R. craverii
      


during the Pliocene.

Geological setting


-
et al.-

the near Campore outcrop (Parma, Emilia Romagna) from the Pliocene (Piacen-
tian) (Ceregato et al.
-
larano deposit.
Recently, Pasini & Garassino (2010) reported the presence of a single indeter-
minate in situ paguroid from the same deposit.
Previous report of Retropluma craverii from the Pliocene of Italy
Retropluma craverii

       

Goneplax
-
face of the carapace, reported in the original description, is a typical character of
Retropluma


-



to those present in the studied specimens that are assigned to R. craverii. So the


ANTONIO DE ANGELI, ALESSANDRO GARASSINO & GIOVANNI PASINI
Fig. 1 - Retropluma craverii


RETROPLUMA CRAVERII
Material

Palaeontological Collections of the Museo di Storia Naturale, Milano (MSNM).
Retropluma craverii-

Measurements are given in millimetres (mm).

et al. (2010).


Systematic Palaeontology




Genus Retropluma
Type species:
Archaeoplax notopus
Included fossil species: R. borealisR. craverii
R. eocenicaR. gallica-
tillo, 2006, R. laurentae
Retropluma craverii

Goneplax? craverii 
Goneplax? craverii Crema in
Retropluma craverii (Crema) in 
Retropluma craverii (Crema) in 
Retropluma craverii (Crema) in 
Retropluma craverii (Crema) in
Retropluma craverii (Crema) in
Retropluma craverii (Crema) in
Retropluma craverii (Crema) in
Retropluma craverii (Crema) in
Emended diagnosis  
  

      

Geological age: Pliocene.
Occurrence and measurements


Description      
-
-




-
-
verse ridges. Anterior ridge continuous, straight, parallel to anterior margin, cross-




-


Fig. 2 - Retropluma craverii-
pace.
Retropluma craverii
ANTONIO DE ANGELI, ALESSANDRO GARASSINO & GIOVANNI PASINI





Discussion. Retropluma          
species, R. borealis      R.
eocenicaR. gallica
& Castillo, 2006 (Eocene - Spain and France), and R. laurentae Collins, Lee &

et al.et al.et al., 2006). Retropluma craverii, the most
recent species of the genus in the fossil record, is distinguished from the other spe-

slightly spatulated in the proximal part, and the anterior and continuous, straight,
and parallel posterior ridges.
Conclusion
The Retroplumidae includes
Archaeopus Bathypluma de Saint
Costacopluma Collins & Morris, 1975, Cristipluma
Loerentheya Beurlen in     Loerenthopluma Beschin,
Busulini, De Angeli & Tessier, 1996, RetrocypodaRetro-
pluma
Bathypluma and Retropluma, live in the Indo-




Retropluma craverii
RETROPLUMA CRAVERII

-
Retropluma craverii
Retropluma
R. eocenicaRetrocypoda
almelaiLoerenthopluma lata Beschin, Busulini, De
et al
PLIOCENE
Retropluma craverii
MIOCENE
OLIGOCENE
Retropluma n. sp.
EOCENE
Retropluma eocenica Retrocypoda almelai
Loerenthopluma lata
ANTONIO DE ANGELI, ALESSANDRO GARASSINO & GIOVANNI PASINI

Retropluma eocenica     Retrocypoda almelai  

za) (Beschin et alLoerenthopluma lata Beschin, Busulini, De Angeli & Tess-

(Vicenza) (Beschin et alRetropluma cf. R. eocenica and Retropluma n. sp.

R. craverii
from the Pliocene of Bra (Piemonte) and Reggio Emilia (Emilia Romagna).
The presence of fossil retroplumids in Italy is very important for the strati-
RetrocypodaR.
almelaiLoerentho-
plumaL. lata from the middle Eocene of Italy and
Oligocene of Hungary and L. danielae
et al., 2010) and
Retropluma
et al
Acknowledgements



di Storia Naturale, Bra, for the useful information regards the holotype of R. craverii,

References
Retropluma-
cea, Decapoda) from the Eocene of the eastern Pyrenees (Spain, France). Cain-
ozoic Research, 5 (1-2): 65-71.
Loerenthopluma
danielae         
Crustaceana Monographs

Aclis aurisparva n. sp. (Gastro-
poda, Aclididae) from the Pliocene of Emilia Romagna (N. Italy). Bollettino
della Società Paleontologica Italiana
Retroplumoidea (Cru-
stacea, Brachyura) nel Terziario del Vicentino (Italia settentrionale). Lavori -
Società Veneziana di Scienze Naturali
-
munities in the middle Pliocene of Northern Italy. The case of the Korobkovia
oblonga-Jupiteria concava. Geobios



-

Journal of Systematic Palaeontology,


Atti della Reale
Accademia di Scienze di Torino
RETROPLUMA CRAVERII



Palaeontos
Loerenthopluma Beschin, Busulini, De Angeli,
& Tessier, 1996 (Decapoda, Brachyura, Retroplumidae) from the Oligocene of
Hungary.
Atti della Società italiana di Scienze naturali e del Museo civico di
Storia naturale in Milano
-
poda: Brachyura) from Italy. Bulletin of the Mizunami Fossil Museum, Mizu-


Archipelago (Indonesia, Phillippine) and the Melanesian arc Islands (Solomon

Mémoire
du Muséum national d’Histoire naturelle
-

rd
Symposium
on Mesozoic and Cenozoic Decapod Crustaceans. Museo di Storia Naturale di

Memorie della Società italiana di Scienze naturali e
del Museo civico di Storia naturale di Milano

Oligocene of Bacino Ligure Piemontese (NW Italy).
Atti della Società italiana
di Scienze naturali e del Museo civico di Storia naturale di Milano, Milano.

The Rafes Bulletin
of Zoology
      
In situ    
Paguroidea) from the Pliocene of Parma and Reggio Emilia (Emilia Romagna -
N Italy).
Atti della Società italiana di Scienze naturali e del Museo civico di
Storia naturale in Milano, Milano, 151 (1): 105-116.


des Campagnes Musorstom, 5. Forest J. (ed.). Mémoire du Muséum national
d’Histoire naturelle

Crustaceana,
Leiden, Monograph 10.

de la tesis doctoral).
Boletin del Istituto Geológico y Minero de España, 70:


Piriñeos, Barcellona.
-
terranéen. Origine et évolution de cette superfamille.
Annales de Paléontologie
(Invertébrés), Paris, 66 (1): 51-66.
-
Boletin Geológico y Minero,

Ricevuto: 1 marzo 2010

ANTONIO DE ANGELI, ALESSANDRO GARASSINO & GIOVANNI PASINI
... Many authors have reported decapod crustaceans from the Pliocene and Pleistocene of Emilia Romagna (Ristori, 1886;Vinassa de Regny, 1897;Tettoni, 1923;Beschin and Santi, 1997;Garassino and Fornaciari, 2000;Garassino et al., 2010;De Angeli et al., 2011). The specimens have been discovered in two different localities along the Apennine Reggiano Mountains around Castellarano and Monticelli di Quattro Castella, both located in Reggio Emilia Province (Emilia Romagna, N Italy) (Figure 1). ...
... Based on these data, we ascribe the specimens to the Piacenzian (Pliocene). An unidentified in situ paguroid and Retropluma craverii (Crema, 1895) (Retroplumidae Gill, 1894) were recently reported from Castellarano by De Angeli et al. (2011). ...
... Remarks: Karasawa and Kato (2003 , Table 6) and Schweitzer et al. (2010) provided check lists of the fossil species of Goneplax. At present, G. craverii Crema, 1895, is assigned to Retropluma (De Angeli et al., 2011). Müller (1993) pointed out that G. formosa Ristori, 1886, andG. ...
Registros de cangrejos braquiuros del Plioceno (Piacenziano) de Reggio Emilia (Emilia Romaña, N Italia)
Article
Full-text available
  • Aug 2013
Four species of brachyuran crabs are recorded from the Pliocene (Piacenzian) clays of the Apennine Mountains, all collected in natural gullies around the Castellarano and Monticelli di Quattro Castella, Reggio Emilia (Emilia Romagna, N Italy). These species are already known in the fossil record of Italy, and are assigned to Calappa granulata (Linnaeus, 1758) (Calappidae De Haan, 1833); Chlinocephalus demissifrons Ristori, 1886 (Euryplacidae Stimpson, 1871); Goneplax rhomboides (Linnaeus, 1758) (Goneplacidae MacLeay, 1838); Monodaeus bortolottii Delle Cave, 1988 (Xanthidae MacLeay, 1838). Chlinocephalus demissifrons and Monodaeus bortolottii are reported for the first time from Emilia Romagna.
View
... Many authors have reported decapod crustaceans from the Pliocene and Pleistocene of Emilia Romagna (Ristori, 1886;Vinassa de Regny, 1897;Tettoni, 1923;Beschin and Santi, 1997;Garassino and Fornaciari, 2000;Garassino et al., 2010;De Angeli et al., 2011). The specimens have been discovered in two different localities along the Apennine Reggiano Mountains around Castellarano and Monticelli di Quattro Castella, both located in Reggio Emilia Province (Emilia Romagna, N Italy) (Figure 1). ...
... Based on these data, we ascribe the specimens to the Piacenzian (Pliocene). An unidentified in situ paguroid and Retropluma craverii (Crema, 1895) (Retroplumidae Gill, 1894) were recently reported from Castellarano by De Angeli et al. (2011). ...
... Remarks: Karasawa and Kato (2003 , Table 6) and Schweitzer et al. (2010) provided check lists of the fossil species of Goneplax. At present, G. craverii Crema, 1895, is assigned to Retropluma (De Angeli et al., 2011). Müller (1993) pointed out that G. formosa Ristori, 1886, andG. ...
Records of brachyuran crabs from the Pliocene (Piacenzian) of Reggio Emilia (Emilia Romagna, N Italy)
Article
  • Jan 2013
Four species of brachyuran crabs are recorded from the Pliocene (Piacenzian) clays of the Apennine Mountains, all collected in natural gullies around the Castellarano and Monticelli di Quattro Castella, Reggio Emilia (Emilia Romagna, N Italy). These species are already known in the fossil record of Italy, and are assigned to Calappa granulata (Linnaeus, 1758) (Calappidae De Haan, 1833); Chlinocephalus demissifrons Ristori, 1886 (Euryplacidae Stimpson, 1871); Goneplax rhomboides (Linnaeus, 1758) (Goneplacidae MacLeay, 1838); Monodaeus bortolottii Delle Cave, 1988 (Xanthidae MacLeay, 1838). Chlinocephalus demissifrons and Monodaeus bortolottii are reported for the first time from Emilia Romagna.
View
... Since de Saint Laurent (1989) clarified the retroplumid condition of Retrocypoda almelai, subsequent authors, with some exceptions, accepted this systematic placement (e.g. Beschin et al., 1996;De Angeli and Beschin, 2001;De Angeli and Garassino, 2006;Feldmann et al., 2006;McLay, 2006;Feldmann and Portell, 2007;Hyžný and Müller, 2010;Schweitzer et al., 2010;De Angeli et al., 2011 andHyžný et al., 2016). We can add in support of the retroplumid condition of Retrocypoda, that besides the contrasted presence of modified and reduced sternite 8 and reduced coxa of P5 (Via, 1969, p. 335;de Saint Laurent, 1989, T7, fig. ...
... Extant and Miocene-Pleistocene retroplumids prefer deep water with muddy or muddy sand bottoms, in contrast to the Paleogene fossil record (de Saint Laurent, 1989;Collins et al., 2003;De Angeli et al., 2011;Baldanza et al., 2013;Gǎsparič and Hyžný, 2014). Retrocypoda dwelt in muddy sandy or sandy bottoms, in shallower waters from inner to outer continental platform. ...
Occurrence of Retrocypoda almelai Via Boada, 1959 (Decapoda: Retroplumidae) in the Eocene of Central Iran
Article
Full-text available
  • Jun 2016
The decapod crustacean Retrocypoda almelai Via Boada, 1959 is reported from Bartonian (middle Eocene) strata of Soh (North of Isfahan, Iran) and represents the most oriental record for the species, hitherto considered endemic and restricted to the western margin of Tethys. This finding is important to understand the paleobiogeographic distribution of retroplumid crabs, which were abundant during Late Cretaceous in America and Africa, but today their representatives are restricted to the Indopacific region.
View
... Discussion. De Angeli et al. (2011) revised Retropluma craverii based upon two specimens from the Pliocene of Reggio Emilia (Emilia-Romagna), pointing out some morphological characters not observable in the original description, such as the very elongate and narrow rostrum, the wide orbito-frontal margin distinctly sinuous, ending with a well-developed forward directed tooth, the dorsal surface of carapace, with three transverse ridges, and the very elongated, flattened legs. These characters are visible on the studied specimens that are assigned to R. craverii. ...
Decapod crustaceans from the late Pliocene (Piacenzian) nearby Faenza (Emilia-Romagna, N Italy)
Article
Full-text available
  • Aug 2018
Several specimens of anomuran and brachyuran decapods are reported from the late Pliocene clays (Argille Azzurre Fm.) at localities nearby Faenza (Ravenna, Emilia-Romagna), located in the foothills of Romagna Apennines (NE Italy). The specimens were assigned to species already reported from the Pliocene of Italy, but never previously recorded in this area. This new report enlarges our knowledge on the composition and distribution of the brachyuran decapods along the Pliocene coastline of the Adriatic Gulf of the paleo- Mediterranean Sea.
View
... The last one is known by the only Retropluma craverii, described for the first time by Crema (1895) from the Late Pliocene (Piacenzian) of Bra (Piedmont, N Italy). De Angeli et al. (2011) revised Retropluma craverii by two retroplumids from the Pliocene of Reggio Emilia (northern Italy), with a well-preserved pleon that allows describing morphological characters of the sternum and pleon in both sexes, and identifying some morphological characters, such as the very elongate and narrow rostrum, the wide orbitofrontal margin distinctly sinuous, ending with a well-developed tooth forwardly directed, and the dorsal surface of the carapace with three transverse ridges, similar to those of the specimens that are assigned to R. craverii. ...
La comunidad de crustáceos decápodos batiales en las canteras de Poggio i Sodi (Cuenca de Siena, Toscana, Italia)
Article
Full-text available
  • Aug 2013
A rich decapod fauna from the Early Pleistocene (late Gelasian-early Calabrian) of Poggio i Sodi quarries (Siena, Tuscany, central Italy) is here reported. Integrated biostratigraphical, sedimentological and paleoecological analyses have been carried out, and some paleoenvironmental inferences are also proposed. The studied decapod community is herein assigned to the upper bathyal; several paleoenvironmental factors (cool water conditions at the sea floor, clay soft bottom, nutrients, very low environmental energy and sedimentation rate) influenced and promoted the crustacean settlement.
View
... Goneplax Leach, 1814, was revised to include the following fossil species previously listed by Karasawa and Kato (2003): G. arenicola (Glaessner, 1960), G. craverii Crema, 1895, G. formosa Ristori, 1886, G. meneghinii Ristori, 1886, G. gulderi Bachmayer, 1953, G. saccoi Crema, 1895, and the fossil and extant G. rhomboides (Linnaeus, 1758). Goneplax craverii had been previously assigned to Retropluma Gill, 1894(Retroplumidae Gill, 1894 by Beschin et al. (1996) (see also De Angeli et al., 2011). New, well-preserved specimens from the Miocene and Pliocene of Italy nevertheless necessitate a revision of the fossil species of Goneplax. ...
Revision of the fossil species of Goneplax Leach, 1814 (Crustacea, Decapoda, Brachyura, Goneplacidae)
Article
Full-text available
  • Aug 2013
A revision of the fossil species of Goneplax Leach, 1814, has resulted in the assignment of four fossil species to Goneplax, but only G. gulderi Bachmayer, 1953, and G. rhomboides are considered as valid. Goneplax craverii Crema, 1895, previously assigned to Retropluma Gill, 1894, G. formosa Ristori, 1886, and G. meneghinii Ristori, 1886, are regarded as junior synonyms of G. rhomboides, while G. sacci Crema, 1895, is considered a nomen dubium. Albaidaplax n. gen. is here erected to include both the Italian specimens from the Miocene of Rio Popogna (Livorno, Tuscany, Italy) and the Spanish specimens from the Pliocene of Guadalquivir Basin (Seville, Andalusia, Spain) previously assigned to G. gulderi. Finally, Ommatocarcinus arenicola Glaessner, 1960, from the Late Oligocene-Middle Miocene of New Zealand, is assigned to the extant Neogoneplax Castro, 2007, constituting the first report of this genus in the fossil record.
View
... Six extinct species of Retropluma are now on record: †Retropluma gallica (Lower Eocene, southern France), †Retropluma eocenica (Lower-Middle Eocene, Spain and northern Italy), †Retropluma cf. eocenica (Lower Oligocene, northwestern Italy), †Retropluma laurentae (Miocene, Sabah, Indonesia), †Retropluma borealis (Upper Miocene, Denmark), †Retropluma craverii (Pliocene, northwestern Italy; see also De Angeli et al., 2011a), and †Retropluma slovenica (Lower Miocene, Slovenia). The northernmost occurrence, at 55°N, of Retropluma is †Retropluma borealis from the Upper Miocene Gram Formation in Denmark. ...
View
Middle Miocene decapod crustacean assemblage from the Tuzla Basin (Tušanj, Bosnia and Herzegovina), with a description of two new species and comparison with coeval faunas from Slovenia
Article
Full-text available
  • Jan 2019
  • PALAEONTOL ELECTRON
A decapod assemblage consisting of three species is described from the upper Langhian (lower Badenian) of the Tuzla Basin in Bosnia and Herzegovina. The assemblage is dominated by Retropluma minuta sp. nov. (Brachyura, Retroplumidae) and accompanied by Munidopsis salinaria sp. nov. (Anomura, Galatheoidea) and Portunus monspeliensis A. Milne Edwards, 1860 (Brachyura, Portunidae). Based on the calcareous nannoplankton, the studied assemblage is assigned to the upper part of the NN5 Zone. The studied assemblage is considered to have inhabited a shallow, near-shore depositional setting, as suggested by the microfossil association. Munidopsis, Portunus and Retropluma have previously been reported from Slovenia, the area closest to the Tuzla Basin with known decapod fossils. Contrary to shallow-marine settings of the localities studied herein, Munidopsis and Retropluma from Slovenian localities are reported from deeper-marine settings. The occurrence of near-complete individuals of Retropluma minuta sp. nov. suggests a wider bathymetric range of the genus in its evolutionary past than it has today.
View
An early Miocene deep-water decapod crustacean faunule from the Slovenian part of the Styrian Basin, and its palaeoenvironmental and palaeobiogeographical significance
Article
Full-text available
  • Nov 2014
A new decapod crustacean faunule is described from the early Miocene of the Slovenian part of the Styrian Basin. The Ivnik Beds exposed at the Činžat locality contain seven species: Calliax michelottii (Axiidea: Callianassidae), Lepidophthalmus paratethyensis sp. nov. (Axiidea: Callianassidae), Jaxea kuemeli (Gebiidea: Laomediidae), Styrioplax exiguus (Brachyura: Chasmocarcinidae), Goneplax gulderi (Brachyura: Goneplacidae), Neopilumnoplax pohorjensis sp. nov. (Brachyura: Mathildellidae) and Retropluma slovenica sp. nov. (Brachyura: Retroplumidae). Numerous specimens of well-preserved Styrioplax exiguus permitted its redescription and re-assignment of its familial placement to Chasmocarcinidae. Neopilumnoplax pohorjensis sp. nov. constitutes the first fossil occurrence of the genus known to date. The decapod association, as well as other faunal elements, suggests low-energy deep-water depositional environment with epibathyal water depth of more than 125 m. The studied locality is situated in the Ribnica–Selnica graben filled with sediments once deposited in the Central Paratethys sea. Based on the affinities of decapod genera of the Central Paratethys and the Proto-Mediterranean, we conclude that the exchange of decapod faunas between these regions was probably regulated by an anti-estuarine circulation permitting an easier incursion of species from the Proto-Mediterranean into the Paratethys and simultaneous hindering the Paratethyan endemics (Styrioplax) from entering the Mediterranean.
View
A new deep-water Decapod Crustacean faunule from the Early Miocene of the Styrian Basin, Slovenia
Conference Paper
Full-text available
  • Jan 2013
Previously, decapods from the Miocene strata in the Slovenian part of the Styrian Basin were reported by Glaessner (1928) and Mikuž (2003). In this contribution we present a report on a new decapod crustacean faunule from the respective area.
View
View
View
View
Late Miocene decapod fauna from Gram, Denmark
Article
Full-text available
  • Jul 2005
Six species of decapod crustacean (two macrurans, one anomuran, three brachyurans) are recognised from upper Miocene strata exposed at the Gram clay-pit, south-west Jutland, Denmark. Three new species, Retropluma borealis, Chaceon miocenicus, and Nephrops kvistgaardae, are erected; the genera Tasadia and Munida are recorded from the Danish Miocene for the first time. Abstrakt: De øvre miocaene aflejringer blotlagt i Gram Teglvaerksgrav indeholder seks arter af tibenede krebsdyr (to hummere, en anomura og tre krabber). Tre af disse, Retropluma borealis, Chaceon miocenicus og Nephrops kvistgaardae, har ikke tidligere vaeret beskrevet, mens de to slaegter Tasadia og Munida for første gang dokumenteres fra det danske Miocaen.
View
Loerenthopluma Danielae, a new crab (Decapoda, Brachyura, Retroplumidae) from the lower Eocene of Northwest Belgium
Article
Full-text available
  • Jan 2010
A new species of retroplumid crab, Loerenthopluma danielae, is described from the Egemkapel Clay Member (Tielt Formation; lower Eocene, Ypresian) at the Ampe sand and clay pit near Egem, northwest Belgium. It is characterized by prominent outer orbital spines, wide orbits and a narrow, spatulate rostrum.
View
Description of Aclis aurisparva n. sp. (Gastropoda, Aclididae) from the Pliocene of Emilia Romagna (N Italy)
Article
Full-text available
  • Jan 2009
A new species of the family Aclididae is described from the Pliocene of Emilia Romagna (Northern Italy) as Aclis aurisparva n. sp. This species was formerly reported as Chileutomia (?) sp. (family Eulimidae) but the finding of new, well preserved material has allowed a correct systematic placement. This new species and other similar Mio-Pliocene congeners, with apparently-polished- shells (Italian and Turkish material, under study) close to the A. attenuans - A. walleri group, allow us to hypothesise that the Aclis species with smooth shells (or with a spiral microsculpture) from the Mediterranean Upper Neogene are more numerous than expected.
View
Retroplumidae (Crustacea, Decapoda) from the Indo-Malayan archipelago (Indonesia, Philippine) and the Melanesian arc islands (Solomon Islands, Fiji and New Caledonia), and paleogeographical comments
Article
Full-text available
  • Jan 2006
Seven species of retroplumid crabs are recorded from Indonesia, Philippine Islands, Solomon Islands, Fiji Islands and New Caledonia. These include Retropluma denticulata (Solomon Islands), R. notopus (Fiji), R. plumosa (Fiji), R. quadrata (Philippine Islands), R. serenei (Fiji Islands and New Caledonia), R. laurentae n. sp. (Indonesia, Philippine Islands, Solomon Islands and New Caledonia), and Bathypluma forficula (Solomon Islands and New Caledonia). The new material considerably extends the distribution of retroplumid crabs eastwards in the Pacific and also extends the depth range of several species. There are now ten extant species of retroplumids known in two genera: Bathypluma de Saint Laurent, 1989 and Retropluma Gill, 1894. Although larval development is unknown, their small egg size suggests that retroplumids have indirect development. Three fossil genera, containing eight species, are recognized: Costacopluma Collins & Morris, 1975, Retrocypoda Via Boada, 1957 and Loerenthopluma Beschin et al. 1996. Some of the fossils placed in the Retroplumidae probably belong to the Palicidae Bouvier, 1898. An analysis of recently discovered fossil retroplumids shows that this family first appeared in the Proto-Atlantic Ocean during the Late Cretaceous, but became extinct in the Atlantic by the Pliocene. The family is now only found in Indo-West Pacific seas.
View
Miocene and Pleistocene crabs (Crustacea, Decapoda) from Sabah and Sarawak
Article
Full-text available
  • Dec 2003
  • J SYST PALAEONTOL
New species of fossil crabs are described and figured from the Miocene and Pleistocene of Sabah and Sarawak. The following three genera and 20 species are new: ? Paguridae gen. et sp. nov., Raninoides morrisi, Sabahranina trushidupensis (gen. nov.), Mursia bakenuensis, Gomezinus tuberculatus (gen. nov.), Saratunus longiorbis (gen. nov.), Lupocyclus karasawai, Galene litoralis, Xanthias miocenicus, Pilumnus fookimensis, Hyastenus sp., Parthenope clypeformis, Parthenope jugula, Nucia platyspinosa, Leucosia calcarata, Pariphiculus decemtuberculatus, Pariphiculus multituberculatus, Philyra trusanensis, Bicarinocarcinus tumidus, Pinnixa microgrannulosa, Retropluma laurentae. Emended descriptions and/or stratigraphical and/or geographical ranges are given for the following 18 species: Thalassina anomala (Herbst), Charybdis (C.) sp., cf. Charybdis (C.) annulata (Fabricius), Heikea tuberculatum nov. com. (Morris & Collins), Podophthalmus vigil (Fabricius), Podophthalmus fusiformis Morris & Collins, Portunus obvallatus Morris & Collins, Portunus woodwardi Morris & Collins, Cyclodius ungulatus (A. Milne Edwards), Carcinoplax sp. aff. Carcinoplax prisca Imaizumi, Hexapus decapodus (Morris & Collins), Pisoides sp., cf. Pisoides bidentatus (A. Milne Edwards), Nucilobus symmetricus Morris & Collins, Leucosia tutongensis Morris & Collins, Iphiculus sexspinosus Morris & Collins, Myra subcarinata Morris & Collins, Orthakrolophus bittneri (Morris & Collins), Macrophthalmus wilfordi Morris & Collins and Pinnixa aequipunctata Morris & Collins. As well as allowing description of new species, the material in the present collections contains species hitherto absent from the fossil record of Borneo sensu lato; the stratigraphical ranges of other species is extended.
View
Systematic List of Fossil Decapod Crustacean Species
Article
  • Jan 2010
A systematic list of all currently known species of fossil deapod crustaceans, placed within a modern classification of the suborder, includes verified authorships and dates of publication along with a complete list of references to all systematic categories.
View
The circalittoral / bathyal paleocommunities in the Middle Pliocene of Northern Italy: The case of the Korobkovia oblonga – Jupiteria concava paleocommunity type
Article
  • Aug 2007
  • Geobios
The Piacenzian section of Campore (Northern Italy) has been used to determine the paleoecological significance of the muddy upper bathyal mollusc associations of the Mediterranean Pliocene. By employing computer-based strategies (cluster and rarefaction analyses) a Korobkovia oblonga–Jupiteria concava paleocommunity type (KJ pt) has been defined. The KJ pt comprises a mosaic of local paleocommunities and paleocommunities whose taxonomic and trophic structures are mainly controlled by oxygen content, sediment accumulation rate, turbidity, and trophic resources. Comparison with mollusc coenoclines recognized in Northern Italy (Rio Merli and River Reno sections) suggests that the KJ pt is bracketed between the deepest muddy circalittoral paleocommunities and the deeper bathyal Bathyspinula excisa–Austrotindaria pusio unit (preliminarily described for the Rio Merli section). The KJ pt is very common in Northern Italy outcrops even though reported by previous authors with different names. We interpret this paleocommunity, which does not go beyond the Middle Pliocene, as the last evidence of an upper bathyal environment in the Neogene climatic-oceanographic regime of the Mediterranean.
View