Table 2 - uploaded by Peter Schuchert
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Review of the family Halopterididae (Hydrozoa, Cnidaria),
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Context 1
... they are formally rather well separable, it remains uncertain how reliable the character "opposite hydrocladia" is and to what extent it is either an apo- morphy, or only a variant of the alternate state. Table 27 gives the characters used to distinguish the species. Type locality.-Great ...
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Citations
... Monostaechas quadridens f. stechowi Leloup, 1935 [47]. [Junior subjective synonym of Monostaechas quadridens (McCrady, 1859) according to Schuchert (1997)]. • TD: 2 syntypes RBINS I.G. 10647/INV.41109 ...
The scientific importance of Dr. Eugène Leloup, one of the key biologists of the Royal Belgian Institute of Natural Sciences in the past century, is documented through his scientific output. We overviewed the scientific career of Dr. E. Leloup by listing his publications, the taxa introduced therein and, when possible, their taxonomic and nomenclatural status as well as their physical whereabouts. An annotated list of his eponyms is also provided.
... Benthic medusozoans were identified following Cairns and Barnard (1984), Calder (1988Calder ( , 1991Calder ( , 1997Calder ( , 2013Calder ( , 2020, Cornelius (1990), Migotto (1996), Schuchert (1997Schuchert ( , 2001Schuchert ( , 2010, Marques (2001), Calder et al. (2003), Di Camillo et al. (2009), Miranda et al. (2011) and Watson (2011). Identifications of planktonic specimens were based on the works of Mayer (1910), Yanagihara et al. (2002), Jarms and Morandini (2019) and Munro et al. (2019). ...
Medusozoans are diverse in species number (4100) and life stages and are of ecological and social importance worldwide. However, studies of medusozoans in the Mexican Pacific (MP) are limited and scattered. Given that its maritime (2,320,380 km2) and coastal (7828 km) regions are the most extensive in Mexico, as well as its geomorphological and ecosystem complexity, the medusozoan fauna of the MP needs better documentation. To that end, this work summarises medusozoan diversity data of the MP based on a review of refereed publications (1897-2023) and the examination of recently collected specimens, field observations, and photographs (2015-2022). Information gathered from the literature search and the collections was compiled into an annotated list of species. As a result, 423 accepted medusozoan species were found in the MP, corresponding to 10% of the 4100 medusozoan species known worldwide. This study highlights three important decades of published work: taxonomic works in the 1930s, ecological works in the 1980s, and recognition of biodiversity under multidisciplinary works in the 2010s. Of the taxa collected in the present work, Cirrholovenia sp., Linuche sp., and Monotheca flexuosa are new records for the MP. Furthermore, Hydrocoryne sp. and Coryne pusilla are new records for the Gulf of California.
... Final identifications were made after examination of specimens under an optical microscope (Leica DMLB) and consultation to the taxonomic works of Calder (1988Calder ( , 1991Calder ( , 1997, Schuchert (1997Schuchert ( , 2004Schuchert ( , 2005Schuchert ( , 2006Schuchert ( , 2007Schuchert ( , 2008aSchuchert ( , 2008bSchuchert ( , 2010, Marques (2001), Cunha et al. (2015), Galea et al. (2017), and other specific literature. The taxonomical list follows the most recent data available at WoRMS (2022) for Anthoathecata, and in Moura et al. (2008) and Maronna et al. (2016) for Leptothecata. ...
... Distribution: Brazil -Bahia (Grohmann et al. 2003). World distribution -recorded from the Caribbean, Porto Rico, and Ilha Nevis (Schuchert 1997). ...
... Distribution: Brazil -São Paulo (Fernandez et al. 2015) and Santa Catarina (Bouzon et al. 2012. World distribution -cosmopolitan with a preference from warm temperate regions (Schuchert 1997). ...
Despite the great advances in research on the taxonomy and ecology of hydroids of the Brazilian coast, those studies are concentrated in the Southeast and South regions of the country, leaving a gap in knowledge from the North and Northeast regions. Aiming to fill part of this gap, we studied the hydroids communities in the state of Sergipe, Northeast Brazil, in the continental shelf and in three estuarine regions. In the continental shelf, samplings with fishing trawls took place during the dry and rainy seasons of 1999-2003 (8 campaigns), from 18 stations distributed at depths of 10, 20, and 30 m. In the estuaries of the rivers Japaratuba, Sergipe and Vaza-Barris three ropes with six polyethylene plates were installed in each place and left submerged for three months in the dry and rainy periods of 2017. Seventy-nine hydroid species of 26 families were identified. Sixteen of these have been assigned to nine Anthoathecata families and the remaining 63 species to 17 Leptothecata families. Among the identified species, 60 are new records from Sergipe and among those, nine are also new records from the Northeast region and two from the Brazilian coast. Our results increase the hydroid records from Sergipe and extend the range of some species inside the Brazilian coast and the Atlantic Ocean, showing the potential for future studies in other environments of the Sergipe coast.
KEY WORDS:
Anthoathecata; Atlantic Ocean; biodiversity; ecology; Leptothecata; new records
... The specimens were kept in formalin for collection purpose, while small subsamples were placed in ethanol for further genetic barcoding studies. To reach family and generic levels of identifications, monographs have been used (Millard 1975;Calder 1988Calder , 1991Calder , 1997Hirohito 1988Hirohito , 1995Bouillon et al. 2006) as well as taxonomic revisions of groups such as Capitata (Petersen 1990;Schuchert 2006) and Filifera (Schuchert 2004(Schuchert , 2007(Schuchert , 2008a(Schuchert , 2008b(Schuchert , 2009, of families such as Halopterididae (Schuchert 1997), Hebellidae (Boero et al. 1997), and of genera such as Filellum (Marques et al., 2011), Halisiphonia (Marques et al., 2006), Hybocodon (Rodriguez et al., 2012), this list being non exhaustive. However, the generic level was reached without confidence for specimens of the family Campanulinidae (5 species reported in this study), a family well known to give such problems, those with no reproductive structures being attributed to the genus Campanulina, following the recommendation of Bouillon et al. (2006). ...
This study explored the unknown biodiversity of mesophotic coral ecosystems (MCEs) in Reunion Island, located in the Southwestern Indian Ocean. MCEs are still largely unexplored whereas they are assumed to shelter a rich and unique biodiversity. As they might likely serve as a source for recolonization after disturbances in shallower reefs, their study is urgently needed. This work focused on an understudied large group of structural and functional ecological importance in reef benthic communities, the hydroids. Performing only 8 deep dives with closed-circuit rebreathers, we recorded 74 species between 65 and 93 m among which 11 species and 3 genera are likely new to science. Furthermore, the explorations made in contrasted geographical zones around the island suggest particular eco-physiological traits for some species: specialized vs. widely tolerant. This preliminary report only shows the tip of the iceberg and opens an avenue for exploration and understanding of such extraordinary biodiversity at such depths.
... The species is widespread in shallow waters of the warm western Atlantic Ocean (Oliveira et al. 2016;Calder 2019), although it was long included in the synonymy of the predominantly European H. diaphana (Heller, 1868). Schuchert (1997) distinguished the two on the basis of morphological characters, and their separation as distinct species has been confirmed by DNA barcoding (Galea et al. 2018;Moura et al. 2018). Differences distinguishing H. alternata from related species of the genus Halopteris Allman, 1877) have been reviewed by Schuchert (1997) and Calder et al. (2019). ...
... Schuchert (1997) distinguished the two on the basis of morphological characters, and their separation as distinct species has been confirmed by DNA barcoding (Galea et al. 2018;Moura et al. 2018). Differences distinguishing H. alternata from related species of the genus Halopteris Allman, 1877) have been reviewed by Schuchert (1997) and Calder et al. (2019). While separated geographically by a significant biogeographic barrier, hydroids identified as H. cf. ...
... Elsewhere in the Pacific it occurs in Hawaii (Cooke 1977, as H. diaphana), including the Northwestern Hawaiian Islands (Calder and Faucci 2021). As for Fraser's reports of the species from the eastern Pacific, at least some appear to have been based on misidentifications (Schuchert 1997). An illustration in Fraser (1938a, pl. ...
The hydroids of Cocos Island (Isla del Coco), Costa Rica, have received scant attention and are poorly known. Only 11 species have been reported from there previously, with five of them being stylasterids. Hydroids examined here were collected during 2019 in a search for invasive species, as part of a fouling survey. Fourteen species – three anthoathecates and 11 leptothecates – were identified in the collection. All represent new records for Cocos Island, elevating its number of reported species to 25. The most abundant species in the collection were Clytia obliqua (Clarke, 1907) and Sertularella affinicostata Calder and Faucci, 2021, found in 11 of 42 samples (26%), and Tridentata borneensis Billard, 1925a, present in nine (21%) of them. Nematocysts of Corydendrium flabellatum Fraser, 1938a and Eudendrium cf. certicaule Fraser, 1938a are newly identified, measured and illustrated. Three species (Clytia brevithecata (Thornely, 1900), Halopteris alternata (Nutting, 1900) and Macrorhynchia philippina Kirchenpauer, 1872), are introduced, with the rest assigned to a native or cryptogenic status.
... Hydroids examined here were referable to Halopteris Allman, 1877, and to the "H. diaphana" species group recognized within that genus by Schuchert (1997). Included in the group by him were H. diaphana (Heller, 1868), H. tenella (Verrill, 1873b), H. alternata (Nutting, 1900), H. billardi (Vannucci, 1951), and H. platygonotheca Schuchert, 1997. ...
... diaphana" species group recognized within that genus by Schuchert (1997). Included in the group by him were H. diaphana (Heller, 1868), H. tenella (Verrill, 1873b), H. alternata (Nutting, 1900), H. billardi (Vannucci, 1951), and H. platygonotheca Schuchert, 1997. Halopteris violae Calder et al. 2003 has subsequently been assigned to the same group. ...
... Within that assemblage, specimens examined here from Laysan Island are closest to H. alternata. Characters distinguishing the species from others in the cluster have been reviewed by Schuchert (1997) and Calder et al. (2019). ...
Forty-two species of hydroids, excluding stylasterids, are reported in the present collection from the Northwestern
Hawaiian Islands. Of these, four are anthoathecates and 38 are leptothecates. Among the latter, Sertularella affinicostata
and Monotheca gibbosa are described as new species. The binomen Halopteris longibrachia is proposed as a new
replacement name for Plumularia polymorpha var. sibogae Billard, 1913, an invalid junior primary homonym of P.
sibogae Billard, 1911. Based largely on evidence from earlier molecular phylogenies, the genus Disertasia Neppi, 1917
is resurrected to accommodate species including Dynamena crisioides Lamouroux, 1824, Sertularia disticha Bosc, 1802,
and Sia. moluccana Pictet, 1893. Sertularella robusta Coughtrey, 1876 is an invalid junior primary homonym of Sla. gayi
var. robusta Allman, 1874a, and has been replaced here by the binomen Sla. quasiplana Trebilcock, 1928, originally
described as Sla. robusta var. quasiplana Trebilcock, 1928. Clytia hummelincki (Leloup, 1935) is referred to the synonymy
of its senior subjective synonym, C. brevithecata (Thornely, 1900). Following Reversal of Precedence provisions in
the International Code of Zoological Nomenclature to preserve prevailing usage of binomena, the familiar names Sia.
disticha Bosc, 1802 (also known as Dynamena disticha) and Lytocarpia phyteuma (Stechow, 1919b) are designated
nomena protecta and assigned precedence over their virtually unknown senior synonyms Hydra quinternana Bosc, 1797
and Aglaophenia clavicula Whitelegge, 1899, respectively, names now reduced to the status of nomena oblita. Twenty
species are reported for the first time from Hawaii [Eudendrium merulum Watson, 1985, Phialellidae (undetermined),
Hebella sp., Hebellopsis scandens (Bale, 1888), H. sibogae Billard, 1942, Clytia brevithecata, C. linearis (Thornely,
1900), C. cf. noliformis (McCrady, 1859), Halecium sp., Sla. affinicostata, Sla. angulosa Bale, 1894, Pasya heterodonta
(Jarvis, 1922), Tridentata orthogonalis (Gibbons & Ryland, 1989), Pycnotheca producta (Bale, 1881), Monotheca
gibbosa, H. longibrachia, A. postdentata Billard, 1913, A. suensonii Jäderholm, 1896, A. whiteleggei Bale, 1888, and
L. flexuosa (Lamouroux, 1816)]. Sertularia orthogonalis, reported for only the third time worldwide, is assigned to
the genus Tridentata Stechow, 1920. Hydroids of the NOWRAMP 2002 collection consisted largely of presumptive
widespread species, with over 75% of them having been reported elsewhere in the tropical Indo-west Pacific region.
... The presence of hydrothecae on the hydrocaulus is the main defining character of the family Halopterididae Millard, 1962(Millard 1962Schuchert 1997), and the generic limits within the family are largely based on the shape of the colonies and their ramification patterns (Schuchert 1997). ...
... The presence of hydrothecae on the hydrocaulus is the main defining character of the family Halopterididae Millard, 1962(Millard 1962Schuchert 1997), and the generic limits within the family are largely based on the shape of the colonies and their ramification patterns (Schuchert 1997). ...
... The new genus shows more affinities with Monostaechas Allman, 1877 in both the origin of subsidiary hydrocladia on the postero-distal part of ahydrothecate internodes, just behind the distal oblique node, and the tendency to a unilateral disposition of subsidiary hydrocladia. Nevertheless, in Monostaechas the ramification pattern is a helicoid or scorpioid sympodium, in which each subsidiary hydrocladium originates from the postero-distal part of the first ahydrothecate internode of the previous hydrocladium (Billard 1913;Millard 1975;Schuchert 1997), resulting in a false axis composed of the basal parts of successive hydrocladia (Billard 1913;Millard 1975). In Monostaechoides gen. ...
In this report, we analyse the benthic hydroids collected on the Vema and Valdivia seamounts during a survey conducted in 2015 in the SEAFO Convention Area, focused on mapping and analysing the occurrence and abundance of benthopelagic fish and vulnerable marine ecosystem (VMEs) indicators on selected Southeast Atlantic seamounts. A total of 27 hydroid species were identified, of which 22 belong to Leptothecata and only five to Anthoathecata. Monostaechoides gen. nov. was erected
within the family Halopterididae to accommodate Plumularia providentiae Jarvis, 1922, and a new species, Monotheca bergstadi sp. nov., is also described. Campanularia africana is recorded for the first time from the Atlantic Ocean, and the Northeast Atlantic species Amphinema biscayana, Stegopoma giganteum and Clytia gigantea are also recorded from the South Atlantic. Three species were identified to the genus level only, due to the absence of their gonosomes. None of the reported species are endemic,
and the hydroid community is clearly dominated by species with a wide geographical distribution in the three major oceans. Only Monotheca bergstadi sp. nov. presently has its distribution restricted to the Vema Seamount and the South African coast.
... Antennella secundaria is currently considered as a circumglobal species (Ansín Agís et al. 2001;Gil et al. 2020), although Schuchert (1997) suggested that it could represent a species complex. In West Africa it has been reported from Morocco (Patriti 1970) to Cape Agulhas in South Africa (Millard 1975). ...
... This species has been sampled from reefs (Calder 2013), algae, concretions, rocks, sponges and the hydroids Pennaria disticha Goldfuss, 1820 and Idiellana pristis (Lamouroux, 1816) (Galea 2008;Calder 2019). Gonothecae have been found in the northern hemisphere in January and February (Schuchert 1997;Galea 2008), while in the southern hemisphere fertile material has been recorded in June and December (Vannucci Mendes 1951;Schuchert 1997). ...
... This species has been sampled from reefs (Calder 2013), algae, concretions, rocks, sponges and the hydroids Pennaria disticha Goldfuss, 1820 and Idiellana pristis (Lamouroux, 1816) (Galea 2008;Calder 2019). Gonothecae have been found in the northern hemisphere in January and February (Schuchert 1997;Galea 2008), while in the southern hemisphere fertile material has been recorded in June and December (Vannucci Mendes 1951;Schuchert 1997). ...
This paper provides the results obtained after study of a small collection of benthic hydroids belonging to the superfamily Plumularioidea McCrady, 1859 collected during four oceanographic surveys, carried out between 2005 and 2008 along the Guinea Current Large Marine Ecosystem (GCLME) off the West African coast. The samples were obtained at nine stations located between 18 and 359 m depth using a bottom trawl (BT) and a Petersen grab. A total of 30 colonies were identified, belonging to 10 species, five genera and three families. The family Aglaopheniidae showed the highest specific richness, with five species, followed by Halopterididae (three species) and Plumulariidae (two species). One new species of the genus Aglaophenia Lamouroux, 1812, A. willasseni sp. nov., is described, and is characterized by the morphology of its lateral nematothecae, provided with two apertures, a feature described here for the first time within this genus. In addition, Halopteris alternata and H. diaphana are reported for the first time from the GCLME region. Our findings of Aglaophenia lophocarpa, Lytocarpia myriophyllum, H. alternata and H. diaphana in Gabon represent the southernmost records of these species in the eastern Atlantic.
Publication LSID: lsid:http://zoobank.org:pub:434AEF7D-457A-4C54-8AA1-A2782BFABEE
... Aglaophenia octodonta (Heller, 1868) Plumularia octodonta (Heller, 1868) 25, 26 Clytia noliformis (McCrady, 1859) Campanularia noliformis McCrady, 1859 2, 3, 8, 9, 22 Aglaophenia picardi Svoboda, 19792, 10, 12, 14, 25, 26 Clytia paulensis (Vanhöffen, 1910) Campanularia paulensis Vanhöffen, 1910 2, 3, 8, 9, 12, 22, 31, 39 (Brinckmann-Voss 1970); 14 (Piraino & Morri 1990); 15 (Rossi 1971); 16 (Morri & Bianchi 1976); 17 (Brinckmann 1964); 18 (Brinckmann-Voss 1987); 19 (Boero et al. 1985); 20 (García Rubies 1992); 21 (Brahim et al. 2010); 22 (Gili 1986); 23 (Svoboda 1979); 24 (Von Schenck 1965); 25 (Svoboda & Cornelius 1991); 26 (Medel & Vervoort 1995); 27 (Stechow 1923); 28 (Broch 1933); 29 (Riedl 1966); 30 (Marktanner-Turneretscher 1890); 31 (Fresi et al. 1982); 32 (Motz-Kossowska 1911); 33 (Schuchert 1997); 34 (Picard 1951b); 35 (Rossi 1961); 36 (Schmidt 1973); 37 (Marinopoulos 1979); 38 (Galea 2007); 39 (Isinibilir et al. 2015); 40 (El Beshbeeshy 1995); 41 (Ramil & Vervoort 1992); 42 (Billard 1936); 43 (Yilmaz et al. 2020); 44 (Picard and Le Roch 1949); 45 (Picard 1951a); 46 (Redier 1962a); 47 (Redier 1962b);48 (El Beshbeeshy 1994); 49 (Roca 1987); 50 (Relini Orsi et al. 1977); 51 (Morri et al. 1991); 52 (Morri & Bianchi 1982); 53 (Brahim et al. 2014); 54 (Brahim et al. 2015). ...
Effects of ocean acidification (OA) on the plant phenology and colonization/settlement pattern of the hydrozoan epibiont
community of the leaves of the seagrass Posidonia oceanica have been studied at volcanic CO2 vents off Ischia (Italy). The study
was conducted in shallow Posidonia stands (2.5–3.5 m depth), in three stations on the north and three on the south sides of the
vent’s area (Castello Aragonese vents), distributed along a pH gradient. At each station, 10–15 P. oceanica shoots were
collected every three months for one-year cycle (Sept 2009–2010). The shoot density of Posidonia beds in the most acidified
stations along the gradient (pH < 7.4) was significantly higher than that in the control area (pH = 8.10). On the other hand, we
recorded lower leaf lengths and widths in the acidified stations in the whole year of observations, compared to those in the
control stations. However, the overall leaf surface (Leaf Area Index) available for epiphytes under ocean acidification
conditions was higher on the south side and on both the most acidified stations because of the higher shoot density under
OA conditions. The hydrozoan epibiont community on the leaf canopy accounted for seven species, three of which were
relatively abundant and occurring all year around (Sertularia perpusilla, Plumularia obliqua, Clytia hemisphaerica). All hydroids
species showed a clear tolerance to low pH levels, including chitinous and non-calcifying forms, likely favoured also by the
absence of competition for substratum with the calcareous forms of epiphytes selected against OA
... One of the most common species at that location, it was collected only once during this study, from the mainland of Ecuador at Salinas. Earlier records of the hydroid from Isla Wolf and Isla Floreana in the Galapagos by Fraser (1938a, as Plumularia alternata) are thought to have been based on a misidentification (Schuchert 1997). ...
