FIGURE 4 - uploaded by David Drumm
Content may be subject to copyright.
Some atypical species of Synapseudes. Synapseudes aflagellatus: A, antennule; B, antenna; C, maxilla; D, pereopod-1. Synapseudes mediterraneus: E, antennule; F, antenna; G, pleon and pleotelson, dorsal aspect; H, pleon andpleotelson, lateral aspect. Synapseudes shiinoi: I, antennule; J, right mandible with palp terminating in multiple setae. Synapseudes acroporae. K, carapace with lateral setulate setae and minute setae covering surface; L, pereonite-6, pleon and pleotelson, lateral aspect, showing same types of setation; M, chela of female with spiniform setae on mid-proximal region of propodus. Synapseudes violaceus: N, uropod with endopod bearing long setulate terminal seta. A-D modified from Sieg (1986); E-H; modified after Băcescu (1977); I-J modified from Riggio (1977); K-N modified from Băcescu (1976).
Source publication
The tanaidacean metapseudid subfamily Synapseudinae Guţu is reviewed, partially revised and the type species, Synapseudes minutus Miller, redescribed. As rediagnosed and defined here, the Synapseudinae is restricted to the genera Synapseudes Miller, Vicinisyndes Guţu, and Creefs Stępień & Błażewicz-Paszkowycz. The genera Curtipleon Băcescu and Cryp...
Contexts in source publication
Context 1
... article having several terminal setae, including at least two being distally serrate (Fig. 3D), and (3) the uropodal endopod composed of three articles (Fig. 3L). In Metapseudes, article-3 of the mandibular palp lacks terminal serrate setae (Fig. 3C), and the antenna (Fig. 3A) and uropodal endopod (Fig. 3H) resemble those of Synapseudes (see Fig. 4G, ...
Context 2
... aflagellatus, remains the only cold-water (sub-Antarctic) member of the genus within the Synapseudinae. The distinctive combination of characters separating this species from the others in the genus include: (1) the greatly reduced condition of both antennular flagella (Fig. 4A), (2) the inner margin of antennular peduncle article lacking spiniform apophyses (Fig. 4A), (3) the presence of five or six long terminal setae on the antenna (Fig. 4B), (4) a maxilla with a reduced number of similar setulate setae on the endites (Fig. 4C), and (5) the presence of five stout, spiniform setae on the posteroventral ...
Context 3
... remains the only cold-water (sub-Antarctic) member of the genus within the Synapseudinae. The distinctive combination of characters separating this species from the others in the genus include: (1) the greatly reduced condition of both antennular flagella (Fig. 4A), (2) the inner margin of antennular peduncle article lacking spiniform apophyses (Fig. 4A), (3) the presence of five or six long terminal setae on the antenna (Fig. 4B), (4) a maxilla with a reduced number of similar setulate setae on the endites (Fig. 4C), and (5) the presence of five stout, spiniform setae on the posteroventral margin of the propodus of pereopods 1-3 ( Fig. 4D). This unique set of characters may warrant ...
Context 4
... The distinctive combination of characters separating this species from the others in the genus include: (1) the greatly reduced condition of both antennular flagella (Fig. 4A), (2) the inner margin of antennular peduncle article lacking spiniform apophyses (Fig. 4A), (3) the presence of five or six long terminal setae on the antenna (Fig. 4B), (4) a maxilla with a reduced number of similar setulate setae on the endites (Fig. 4C), and (5) the presence of five stout, spiniform setae on the posteroventral margin of the propodus of pereopods 1-3 ( Fig. 4D). This unique set of characters may warrant the elevation of Synapseudes aflagellatus to a new monotypic genus; however, we ...
Context 5
... others in the genus include: (1) the greatly reduced condition of both antennular flagella (Fig. 4A), (2) the inner margin of antennular peduncle article lacking spiniform apophyses (Fig. 4A), (3) the presence of five or six long terminal setae on the antenna (Fig. 4B), (4) a maxilla with a reduced number of similar setulate setae on the endites (Fig. 4C), and (5) the presence of five stout, spiniform setae on the posteroventral margin of the propodus of pereopods 1-3 ( Fig. 4D). This unique set of characters may warrant the elevation of Synapseudes aflagellatus to a new monotypic genus; however, we tentatively retain it within Synapseudes, pending re-examination of the type material ...
Context 6
... antennular peduncle article lacking spiniform apophyses (Fig. 4A), (3) the presence of five or six long terminal setae on the antenna (Fig. 4B), (4) a maxilla with a reduced number of similar setulate setae on the endites (Fig. 4C), and (5) the presence of five stout, spiniform setae on the posteroventral margin of the propodus of pereopods 1-3 ( Fig. 4D). This unique set of characters may warrant the elevation of Synapseudes aflagellatus to a new monotypic genus; however, we tentatively retain it within Synapseudes, pending re-examination of the type material and further systematic ...
Context 7
... Tasmanian species, S. acroporae, appears to exhibit several unique features, including (1) the subproximal outer face of propodus (palm) of female chela armed with a stout spiniform seta (Fig. 4M), the dorsal surface of each of the pereonites and cephalothorax with long plumose setae (not simple setae as in the other know members of the genus) (Fig. 4K, L), and the surface of its body appearing to be covered with fine setules (Fig. 4K, L). None of these characters appear to be shared with other members of the genus. It should ...
Context 8
... Tasmanian species, S. acroporae, appears to exhibit several unique features, including (1) the subproximal outer face of propodus (palm) of female chela armed with a stout spiniform seta (Fig. 4M), the dorsal surface of each of the pereonites and cephalothorax with long plumose setae (not simple setae as in the other know members of the genus) (Fig. 4K, L), and the surface of its body appearing to be covered with fine setules (Fig. 4K, L). None of these characters appear to be shared with other members of the genus. It should also be mentioned that another atypical Tasmanian species, S. violaceus, is illustrated with a long terminal plumose seta on the uropodal endopod ( Fig. ...
Context 9
... (1) the subproximal outer face of propodus (palm) of female chela armed with a stout spiniform seta (Fig. 4M), the dorsal surface of each of the pereonites and cephalothorax with long plumose setae (not simple setae as in the other know members of the genus) (Fig. 4K, L), and the surface of its body appearing to be covered with fine setules (Fig. 4K, L). None of these characters appear to be shared with other members of the genus. It should also be mentioned that another atypical Tasmanian species, S. violaceus, is illustrated with a long terminal plumose seta on the uropodal endopod ( Fig. ...
Context 10
... of the genus) (Fig. 4K, L), and the surface of its body appearing to be covered with fine setules (Fig. 4K, L). None of these characters appear to be shared with other members of the genus. It should also be mentioned that another atypical Tasmanian species, S. violaceus, is illustrated with a long terminal plumose seta on the uropodal endopod ( Fig. ...
Context 11
... present on the illustration of the antenna (Băcescu 1977: fig. 2E). If substantiated, the most systematically significant feature of S. mediterraneus is the presence of a pair of small elongate, ventrolateral, protuberances on pleonites 1-2. Băcescu considered these structures as possible vestiges of pleopods; however, based on his illustrations (Fig. 4H) we believe that these structures appear to represent the lateral spines of the reduced pleura associated with pleonites 1- 2. They are somewhat similar to lateral processes on the partially fused pleonites of R. idios, which has the pair of pleopods on pleonite-1 inserted more ventrally (Fig. ...
Context 12
... shiinoi, also described from the Mediterranean, appears to have affinities with S. mediterraneus by having three terminal setae on the antenna and reduced flagella articles (Fig. 4I), but is unique in having the last article of the mandibular palp terminating in a tight, broom-like cluster of about ten long setae (Fig. 4J), a character not exhibited by any other known members of the ...
Context 13
... shiinoi, also described from the Mediterranean, appears to have affinities with S. mediterraneus by having three terminal setae on the antenna and reduced flagella articles (Fig. 4I), but is unique in having the last article of the mandibular palp terminating in a tight, broom-like cluster of about ten long setae (Fig. 4J), a character not exhibited by any other known members of the ...
Context 14
... (Fig. 14C). Incisor with two blunt lobes, setiferous lobe with reduced, bifurcate lacinia mobilis and three simple setae; molar distally serrate; palp with three-articles, articles 1 and 2 asetose, article-3 with two distal pectinate ...
Context 15
... (Fig. 14D, E). Outer endite (Fig. 14E) having eight spines and simple setae along outer margin; inner endite ( Fig. 14D) with four setulate distal setae; palp (Fig. 14F) with two long finely pectinate terminal ...
Context 16
... (Fig. 14D, E). Outer endite (Fig. 14E) having eight spines and simple setae along outer margin; inner endite ( Fig. 14D) with four setulate distal setae; palp (Fig. 14F) with two long finely pectinate terminal ...
Context 17
... (Fig. 14D, E). Outer endite (Fig. 14E) having eight spines and simple setae along outer margin; inner endite ( Fig. 14D) with four setulate distal setae; palp (Fig. 14F) with two long finely pectinate terminal ...
Context 18
... (Fig. 14D, E). Outer endite (Fig. 14E) having eight spines and simple setae along outer margin; inner endite ( Fig. 14D) with four setulate distal setae; palp (Fig. 14F) with two long finely pectinate terminal ...
Context 19
... (Fig. 14G, H). Basis as long as wide, naked. Palp article-1 short, compressed, lateral margin expanded and terminating in large robust spine; inner distal margin with long, simple seta extending distally to article-2. Article-2 slightly shorter than wide with four basally swollen, distally pectinate setae and six simple setae (proximal most being ...
Context 20
... being longer than article-2). Article-3 slightly longer than wide with five basally swollen, distally pectinate setae, and two short submarginal setae on inner margin. Article-4 about 1.5 times as long as wide, with two basally swollen, distally pectinate setae and three simple setae (subdistal seta distinctly longer than the other two). Endite (Fig. 14G') having inner margin with four coupling hooks and two subdistal setulose setae, and with four distal setulose setae and one setulose ...
Context 21
... (Fig. 14I). With long distal pectinate seta. Cheliped (Fig. 14J). Basis 1.3 times as long as wide, with three setae along ventral margin. Merus twice as long as wide, with three ventral setae. Carpus 3.3 times as long as wide, with two ventral setae and one subdistal spine. Propodus half as long as carpus, with two setae near insertion of ...
Context 22
... (Fig. 14I). With long distal pectinate seta. Cheliped (Fig. 14J). Basis 1.3 times as long as wide, with three setae along ventral margin. Merus twice as long as wide, with three ventral setae. Carpus 3.3 times as long as wide, with two ventral setae and one subdistal spine. Propodus half as long as carpus, with two setae near insertion of dactylus; fixed finger with three ventral setae and four ...
Context 23
... (Fig. 14K). Basal article twice as long as wide, with strong apophysis on inner distal margin; exopod biarticulate, distal article terminating in two setae; endopod with four articles, article-3 with two distal broom setae, article-4 terminating in two broom setae and three long simple distal ...
Context 24
... S. hansknechti, as in S. mediterraneus, the delineated pleonites present are well-developed with distinct lateral processes (see Figs 16G; 4G, H, respectively). In S. hansknechti however, three instead of two pleonites are present. ...
Context 25
... with five articles. Antennular peduncle article-1 having dense row of small acute spines along inner margin. . . . . . . . Antenna terminating in five or six long simple setae (Fig. 4B). Pereopods 1-3 ventral margin of propodus with five stout spin- iform setae (Fig. 4D) Antennule peduncle article-1 with inner margin of basis having at least two spine-like apophyses . . . . . . . . . . . . . S. setoensis ...
Context 26
... with five articles. Antennular peduncle article-1 having dense row of small acute spines along inner margin. . . . . . . . Antenna terminating in five or six long simple setae (Fig. 4B). Pereopods 1-3 ventral margin of propodus with five stout spin- iform setae (Fig. 4D) Antennule peduncle article-1 with inner margin of basis having at least two spine-like apophyses . . . . . . . . . . . . . S. setoensis ...
Context 27
... and outer antennular flagella with two and three articles, respectively. Pereopod-1 ventral margin of propodus having three blunt spiniform setae . Pereopod-1 ventral margin of propodus with three stout spiniform setae. Antennal article-3 more than three times length of article-4 . . . Setulate terminal seta on uropodal endopod article-3 (Fig. 4N) Rostrum irregularly concave with inner margin having seven or eight small tubercles . . . . . . . . . . . . . . . . . . . S. australianus - Rostrum with anterior margin distinctly notched, appearing bifurcate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. rudis ...
Similar publications
The holotypes of Styphlus syriacus Stierlin, 1881, and Styphlus penicillus Schoenherr, 1826, were examined. As a consequence, other available specimens of both species were re-examined, which led to a re-evaluation of their morphological characters, and distribution. Styphlus syriacus is widely distributed in the eastern Mediterraneum, whereas S. p...
Citations
... Besides the Julmarichardiidae and Numbakullidae, only two other apseudomorphan families, the Kalliapseudidae Lang, 1956and Parapseudidae Guţu, 1981(see Drumm 2005Kakui & Hiruta 2014Morales-Núñez et al. 2017) are known to have distinct mucus glands. The mucus produced by these glands is used, at least in part, in the construction of domiciles (Drumm 2005;Morales-Núñez et al. 2017;Heard et al. 2018). One of us (RWH) when initially sorting tanaidaceans samples from the NW Australian Shelf observed remnants of mucoid domiciles still attached to specimens of both Julmarichardia gutui and Numbakulla pygmaeus Guţu & Heard, 2002. ...
A new tanaidacean family Julmarichardiidae is designated to receive the Indo-Pacific genus Julmarichardia Guţu. The new family is characterized by having a prominent rostrum, a strongly developed coxal process of pereopod-1 with plumose setae and sometimes spines, and the presence of mucus glands and packets throughout its body. The latter appear to be involved in the construction of a mucus domicile. Based on distinctive antennal and pereopodal characters, the South China Sea species, J. bajau Bamber & Sheader, is placed in a new monotypic genus. A second Australian species
is described from specimens collected on the northwestern continental shelf from depths of 37 to 83 m. The new species can be distinguished from its sympatric congener J. gutui Ritger & Heard by a variety of characters, including the lack of setulose setae on the rostral margin and the posterior margin of pereopod-1 having three or fewer setulate setae. It differs from J. alinati Guţu, by the shape and/or spination of the rostrum, antennule, and antenna. Julmarichardia dollfusi (Guţu) is removed from Julmarichardia and designated as Metapseudidae incertae sedis. A key to the six species comprising the
genus Julmarichardia is presented.
... Polarization of the characters was conducted through outgroup comparison. Metapseudes wilsoni Bamber, 2007, andRonabus idios (Gardiner, 1973) were chosen as out-groups based on Heard et al. (2018). ...
... The cladistic analysis of Synapseudes supported the monophyly of the genus and agreed with the erection of the genus Ronabus by Heard et al. (2018). Ronabus is separated from Synapseudes based on the number of antennal flagella [S2(2)], the number of antennal terminal setae [S4(3)], the number of articles in the inner and outer antennular flagellum [S5(0) and S6(1)], the number of terminal setae on the mandibular palp [S7(3)], number of articles on the uropodal exopod [S15(2)], and telson with bulgae [S20 (1)]. ...
Oceanic islands are known by their unique evolutionary histories and high endemicity caused by isolation. This is the first survey on the biodiversity of Peracarida from Trindade Island, a volcanic island located about 1,160 km off the Brazilian coast, with the first reports of Tanaidacea from the island and the description of Synapseudes isis sp. nov. and three new species of Amphipoda (Ampithoe thaix sp. nov., Elasmopus gabrieli sp. nov., and Eusiroides lucai sp. nov.). The results of the phylogenetic analysis of Synapseudes based on morphological characters and its biogeography through the Bayesian Binary MCMC analysis (BBM) suggested an Indo-Pacific origin for the genus. Finally, the biodiversity of Trindade Island is compared to that of the Abrolhos Archipelago, the closest islands from the coast on the continental shelf, suggesting a high endemicity of Peracarida, corresponding to 44% of Amphipoda and 50% of Tanaidacea species in the island of Trindade.
... These authors also provided new and relevant biological and paleoenvironmental information related to the new taxa they described. Most recently Heard et al. (2018aHeard et al. ( , 2018b) described a new apseudomorphan species and a new genus and species of tanaidomorphan from specimens preserved in Miocene amber from southern Mexico. These publications also include reviews and discussions of relevant research on fossil Tanaidacea, especially with regard to the paleoenvironments in which they occurred. ...
... A; M, Numbakulla pygmaeus Guţu and Heard (2002); N, Pseudoapseudomorpha sp. A; O and R, Synapseudes caleyi Stępień & Błażewicz, 2018 in Heard et al. (2018b); P, Jurmarichardia gutui Ritger and Heard (2007); Q, Gigantapseudes maximus Gamô (1984) Heard et al. (2004); B, Guţu (2010); C, David and Heard (2015); G, Băcescu (1961;I, Guţu and Angsupanich (2006); J, McSweeny (1982); K, Băcescu (1978); M, Guţu and Heard (2002); O, Heard et al. (2018b); P, Ritger and Heard (2007); Q, Gamô (1984);R, Heard et al. (2018b) modified for size comparison with Q). ...
... A; M, Numbakulla pygmaeus Guţu and Heard (2002); N, Pseudoapseudomorpha sp. A; O and R, Synapseudes caleyi Stępień & Błażewicz, 2018 in Heard et al. (2018b); P, Jurmarichardia gutui Ritger and Heard (2007); Q, Gigantapseudes maximus Gamô (1984) Heard et al. (2004); B, Guţu (2010); C, David and Heard (2015); G, Băcescu (1961;I, Guţu and Angsupanich (2006); J, McSweeny (1982); K, Băcescu (1978); M, Guţu and Heard (2002); O, Heard et al. (2018b); P, Ritger and Heard (2007); Q, Gamô (1984);R, Heard et al. (2018b) modified for size comparison with Q). ...
A new fossil apseudomorphan tanaidacean, Protoapseudoides espinalensis gen. et n. sp., from the Chiapas Region of Mexico, is described and placed within the new monotypic family Protoapseudoidae. Its description is based on more than 1000 specimens collected from the Lower Cretaceous (Aptian) in laminar dolomites from the El Espinal quarries (Sierra Madre Formation). The presence of a telsonic somite partially fussed, but ventrally distinct indicates that the body form of this new tanaidacean may represent a transitional evolutionary step between fossil Anthracocaridomorpha and the extant Apseudomorpha. The presence of an apparently fused, but a ventrally delineated telsonic somite indicates that the new family may represent a transition of an anthracocaridomorphan to an apseudomorphan body form. A new family, the Protoapseudoidae, is designated to accommodate the unique combination of morphological features exhibited by the new Chiapas species. These features include the presence of a vestigial telson, a blunt subtriangular rostrum, vestigial anterolateral processes on the carapace, and a single male genital cone, coupled with the absence of eye stalks, coxal spine on the first pereopod, and spines or lateral processes on carapace and pereon. This combination of characters distinguishes the new family from all the other known extinct and extant families within the Order Tanaidacea. Though clearly indicated ventrally, unlike the Anthracocaridomorphan, the vestigial telsonic somite of new Chiapas family appears not to be “independent” or “articulated,” and is functionally fused with pleonite-6 to form a pleotelson. Accordingly, the new family is tentatively placed within the suborder Apseudomorpha. The Protoapseudoidae
appears, at least superficially, to have possible affinities with both the Paleozoic genus Ophthalmapseudes and to the members of the extant parapseudid Discapseudes-Halmyrapseudes Complex. The Paleozoic monotypic, anthracocaridid genera Eucryptocaris and Ophthalmapseudes, due to their unique morphological features and temporal distances, are hierarchized to family rank. As Eucryptocaridae n. fam. and Ophthalmapseudidae n. fam.
Due to their based similarity, the superfamily Jurapseudoidea, is considered a junior synonym of the superfamily Apseudoidea. The possible relationship between the extinction of Protoapseudoidae and the emergence of parapseudid tanaidaceans in Americas is discussed. The morphological changes recorded between the Cretaceous fossil tanaidaceans, including the review of those 25 species as far known, and their extant relatives are considered to propose the timelines on the evolution of different tanaidacean morphotypes. Also, here are discussed the taphonomic and paleoenvironmental Condition that allow the fossil preservation of tanaidaceans.
... These authors also provided new and relevant biological and paleoenvironmental information related to the new taxa they described. Most recently Heard et al. (2018aHeard et al. ( , 2018b) described a new apseudomorphan species and a new genus and species of tanaidomorphan from specimens preserved in Miocene amber from southern Mexico. These publications also include reviews and discussions of relevant research on fossil Tanaidacea, especially with regard to the paleoenvironments in which they occurred. ...
... A; M, Numbakulla pygmaeus Guţu and Heard (2002); N, Pseudoapseudomorpha sp. A; O and R, Synapseudes caleyi Stępień & Błażewicz, 2018 in Heard et al. (2018b); P, Jurmarichardia gutui Ritger and Heard (2007); Q, Gigantapseudes maximus Gamô (1984) Heard et al. (2004); B, Guţu (2010); C, David and Heard (2015); G, Băcescu (1961;I, Guţu and Angsupanich (2006); J, McSweeny (1982); K, Băcescu (1978); M, Guţu and Heard (2002); O, Heard et al. (2018b); P, Ritger and Heard (2007); Q, Gamô (1984);R, Heard et al. (2018b) modified for size comparison with Q). ...
... A; M, Numbakulla pygmaeus Guţu and Heard (2002); N, Pseudoapseudomorpha sp. A; O and R, Synapseudes caleyi Stępień & Błażewicz, 2018 in Heard et al. (2018b); P, Jurmarichardia gutui Ritger and Heard (2007); Q, Gigantapseudes maximus Gamô (1984) Heard et al. (2004); B, Guţu (2010); C, David and Heard (2015); G, Băcescu (1961;I, Guţu and Angsupanich (2006); J, McSweeny (1982); K, Băcescu (1978); M, Guţu and Heard (2002); O, Heard et al. (2018b); P, Ritger and Heard (2007); Q, Gamô (1984);R, Heard et al. (2018b) modified for size comparison with Q). ...
A new fossil apseudomorphan tanaidacean, Protoapseudoidus espinalensis gen. et n. sp., from the Chiapas Region of Mexico, is described and placed within the new monotypic family Protoapseudoidae. Its description is based on more than 1000 specimens collected from the Lower Cretaceous (Aptian) in laminar dolomites from the El Espinal quarries (Sierra Madre Formation). The presence of a telsonic somite partially fussed, but ventrally distinct indicates that the body form of this new tanaidacean may represent a transitional evolutionary step between fossil Anthracocaridomorpha and the extant Apseudomorpha. The presence of an apparently fused, but a ventrally delineated telsonic somite indicates that the new family may represent a transition of an anthracocaridomorphan to an apseudomorphan body form. A new family, the Protoapseudoidae, is designated to accommodate the unique combination of morphological features exhibited by the new Chiapas species. These features include the presence of a vestigial telson, a blunt subtriangular rostrum, vestigial anterolateral processes on the carapace, and a single male genital cone, coupled with the absence of eye stalks, coxal spine on the first pereopod, and spines or lateral processes on carapace and pereon. This combination of characters distinguishes the new family from all the other known extinct and extant families within the Order Tanaidacea. Though clearly indicated ventrally, unlike the Anthracocaridomorphan, the vestigial telsonic somite of new Chiapas family appears not to be “independent” or “articulated,” and is functionally fused with pleonite-6 to form a pleotelson. Accordingly, the new family is tentatively placed within the suborder Apseudomorpha. The Protoapseudoidae appears, at least superficially, to have possible affinities with both the Paleozoic genus Ophthalmapseudes and to the members of the extant parapseudid Discapseudes-Halmyrapseudes Complex. The Paleozoic anthracocaridid genera Eucryptocaris and Ophthalmapseudes, due to their unique morphological features and temporal distances, are hierarchized to family rank. Based on their high morphological similarity, members of the apseudomorphan superfamily Jurapseudoidea are subsumed into the superfamily Apseudoidea. The possible relationship between the extinction of Protoapseudoidae and the emergence of parapseudid tanaidaceans in Americas is discussed. The morphological changes recorded between the Cretaceous fossil tanaidaceans, including the review of those 25 species as far known, and their extant relatives are considered to propose the timelines on the evolution of different tanaidacean morphotypes. Also, here are discussed the taphonomic and paleoenvironmental Condition that allow the fossil preservation of tanaidaceans.
... Later, Sieg (1983) selected S. carinatoides as the type species for this genus-group name, although type fixation by subsequent designation is only valid for genus-group names proposed before 1931 (Article 60 of the Code). Workers thereafter followed Sieg's nomenclatural treatment of Curtipleon and treated this genus-group taxon as both available (from Bǎcescu 1976b) and valid (e.g., Larsen 2002;Bamber 2008;Stępień and Błażewicz-Paszkowycz 2013;Heard et al. 2018). ...
... Family Metapseudidae Lang, 1970 Genus Curtipleon Sieg, 1983Curtipleon Bǎcescu, 1976b: 51 (nomen nudum, without a type species fixation); Larsen 2002: 146;Guţu 2006: 16;Stępień and Błażewicz-Paszkowycz 2013: 569;Kakui and Naruse 2015: 146;Larsen et al. 2015: 297;Anderson 2017: 176;Heard et al. 2018: 302. Curtipleon Sieg, 1983 Diagnosis. ...
The genus-group name Curtipleon Bǎcescu, 1976 is not available due to Bǎcescu's failure to fix its type species in the original publication. This genus-group name should be attributed to Sieg (1983)-the work accidentally validated the ge-nus-group name under Article 13 of the International Code of Zoological Nomenclature.
... The Tanaidacea associated with coral reefs worldwide remain almost completely unknown and the list of 96 species reported so far is undoubtedly incomplete (see Fig. 1, Table 1 and citation therein). As few as 20 species were described from Australian coral reefs (Whitelegge 1901;Băcescu 1981;Edgar 1997;Błażewicz-Paszkowycz and Bamber 2009;Błażewicz-Paszkowycz and Zemko 2009;Stępień andBłażewicz-Paszkowycz 2009, 2013;Stępień 2013;Heard et al. 2018). ...
... Species lists from even larger areas seem far from complete (Table 1). For example, African coral reefs are known to support as few as 22 species (Băcescu 1975(Băcescu , 1976aRoman 1976;Guţu 2007Guţu , 2010Guţu , 2016, 21 species were recorded in Indonesia (Stebbing 1910;Shiino 1965;Guţu 1992Guţu , 1995Guţu , 1997Guţu , 1998Guţu , 2006Guţu , 2007Guţu , 2016Larsen 2002;Larsen and Rayment 2002;Aguspanich 2005, 2006), and 20 species from off Australia (Hale 1933;Edgar 1997;Băcescu 1981;Guţu 2006;Błażewicz-Paszkowycz and Zemko 2009;Błażewicz-Paszkowycz and Bamber 2009;Stępień andBłażewicz-Paszkowycz 2009, 2013;Stępień 2013;Heard et al. 2018), and yet those three areas belong to the most comprehensively studied regions of the world in terms of coral reef tanaidacean fauna diversity. Coral reefs in some regions or even in entire basins, e.g., the Red Sea, have not been surveyed for tanaidacean diversity at all. ...
... Coral reefs in some regions or even in entire basins, e.g., the Red Sea, have not been surveyed for tanaidacean diversity at all. There is only a few tanaidacean species know from the Great Florida Reef, the world's third largest barrier reef (Heard et al. 2004); few species only have been reported from the Caribbean Sea reef systems (Richardson 1905;Sieg 1982;Guţu 2001Guţu , 2006Guţu and Heard 2002;Larsen 2011). The scale of tanaidacean diversity underestimation is therefore huge, and there is hardly any recent information available as most of current knowledge is based on data published more than 30 years ago. ...
The Great Barrier Reef (GBR) is considered to be one of the most important marine biodiversity hotspots on Earth. At the same time, knowledge on the smallest inhabitants of this habitat is extremely scarce, which is particularly apparent with respect to small peracarid crustaceans of the order Tanaidacea. Prior to this study, as few as 20 tanaidacean species had been reported from Australian coral reefs, this study yielding 56 species new to science. Our analysis of a high number of qualitative samples collected at two GBR sites (Heron and Lizard Islands) from a depth range of 0 to about 30 m in the framework of the Census of Coral Reef Ecosystem program (one of the Census of Marine Life-related projects) almost doubled the total number of coral reef-associated tanaidacean species known worldwide. Altogether, 60 species (distributed among 7622 individuals) were identified, 46 and 41 species being recorded on Heron and Lizard Islands, respectively. The tanaidaceans were dominated by members of the families Leptocheliidae (8 species and more than half of all specimens at both sites) and Metapseudidae (11 species, 6 and 3% of individuals, respectively). The most speciose genera were Pseudoapseudomorpha (4 species), Paradoxapseudes, Parapseudes, Pugiodactylus, and Zeuxo (3 species each). Most species were rare, their frequency of occurrence in samples not exceeding 15%. The species accumulation curves did not reach the asymptote.
Based on specimens collected from eulittoral zone in rocky shores of northeast of Rio de Janeiro (Brazil) on 2017, two new ta-naidaceans species from two different suborders are described: Apseudomorpha brasiliensis sp. nov. (Apseudomorpha, Metapseu-didae) and Pseudozeuxo fischeri sp. nov. (Tanaidomorpha, Pseudozeuxidae). Diagnostic characters of Apseudomorpha brasiliensis are mandible palp article-2 and article-3 with six and nine finely penicillate setae on inner margin, respectively; pereopod-1 carpus and propodus with two and four ventral spines, respectively; pleonites 2 and 5 with pleura having long distal seta; uropod exopod shorter than endopod articles 1-2 combined, endopod four-articled. Pseudozeuxo fischeri is characterized by pereopods 1-3 coxa with long seta about half as long as basis; pereopods 2-3 carpus with ventrodistal seta; propodus with two ventral setae; pereopods 4-6 propodus with two ventral spines and one seta; uropod endopod two-and exopod one-articled. This is the first record of the family Pseudozeuxidae and the metapseudid subfamily Metapseudinae from the Southwestern Atlantic (Brazil). Remarks on their associations with macroalgae and identification keys to world species of Apseudomorpha and Pseudozeuxo are provided.
A taxonomic checklist of sublittoral tanaidaceans from the north coast of the Yucatan Peninsula, southern Gulf of Mexico, is presented in this study; it includes notes on geographic distribution, habitat, and an identification key. The genus Cacoheterotanais and the species Cacoheterotanais rogerbamberi, Mesokalliapseudes macsweenyi, Pagurotanais largoensis, Parakonarus juliae, and Psammokalliapseudes granulosus have their known distribution range within the Gulf of Mexico expanded, and are considered new records; this increases the number of tanaidacean species to 23 for the southeastern Gulf, and to 87 for the entire Gulf of Mexico.
Previous information on the taxonomy and distribution of the crustacean order Tanaidacea occurring within the widely-dispersed Polynesian Archipelago has been limited to four nominal species, Apseudes rikiteanus Nobili, Apseudes seurati Nobili, Zeuxo seurati (Nobili) and Tanzanapseudes polynesiensis Müller. Based on specimens collected between 2009 and 2011 from coastal waters of Mo'orea Island (Society Islands, French Polynesia), two new metapseudid tanaidaceans, Apseudomorpha drummi and Cryptapseudes mamua, are described. Keys to the identification of species currently placed within the genera Apseudomorpha Guţu and Cryptapseudes Băcescu are provided.
