Revision of the family Euryplacidae Stimpson, 1871 (Crustacea: Decapoda: Brachyura: Goneplacoidea)

Zootaxa ◽  
2010 ◽  
Vol 2375 (1) ◽  
pp. 1 ◽  
Author(s):  
PETER CASTRO ◽  
PETER K. L. NG
Keyword(s):  
Florida Keys ◽  
Eastern Pacific ◽  
Nominal Species ◽  
Pacific Region ◽  
Tropical Eastern Pacific ◽  
Atlantic Region ◽  
Western Atlantic ◽  
The Family ◽  
The World ◽  
Pacific Species

The family Euryplacidae Stimpson, 1871, traditionally included in the Goneplacidae MacLeay, 1838, is revised based on the examination of the type material of many of its species as well as unidentified and previously identified material from around the world. The revised family now consists of 31 species (including five that are described as new) belonging to 13 genera (including four that are described as new): Eucrate De Haan, 1835, with eight species, of which one is new; Euryplax Stimpson, 1859, with two species; Frevillea A. Milne-Edwards, 1880, with three species; Henicoplax n. gen., with five species of which three are new; Heteroplax Stimpson, 1858, monotypic; Machaerus Leach, 1818, with two species; Nancyplax Lemaitre, García-Gómez, von Sternberg & Campos, 2001, monotypic; Platyozius Borradaile, 1902, monotypic; Psopheticoides Sakai, 1969, monotypic; Systroplax n. gen., monotypic; Trissoplax n. gen., with two species, of which one is new; Trizocarcinus Rathbun, 1914, with two species; Villoplax n. gen., monotypic; and Xenocrate Ng & Castro, 2007, monotypic. The genus Platyozius and Eucrate formosensis Sakai, 1974, are removed from the synonymy of Eucrate and E. alcocki Serène, in Serène & Lohavanijaya, 1973, respectively. Neotypes are selected for Heteroplax dentata Stimpson, 1858, and Pilumnoplax sulcatifrons Stimpson, 1858, two species described from Hong Kong that have a confusing taxonomic history. A neotype is also selected for Euryplax nitida Stimpson, 1859, described from the Florida Keys. Seven nominal species described by other authors were found to be junior subjective synonyms for other species: Eucrate affinis Haswell, 1882, E. costata Yang & Sun 1979, E. haswelli Campbell 1969, and Pseudorhombila sulcatifrons var. australiensis Miers, 1884, of Trissoplax dentata (Stimpson, 1858); Galene laevimanus (Lucas, in Jacquinot & Lucas, 1853) of Eucrate dorsalis (White, 1849); Heteroplax nagasakiensis Sakai, 1934, of H. transversa Stimpson, 1858; and Pilumnoplax sulcatifrons Stimpson, 1858, of Eucrate crenata (De Haan, 1835). Eight euryplacid genera are exclusively found in the Indo-West Pacific region (except one species introduced in the Mediterranean), one is exclusive to each the Eastern Atlantic and Tropical Eastern Pacific regions, three to the Western Atlantic region, and one genus has both Western Atlantic and Tropical Eastern Pacific species.

Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea)

Zootaxa ◽  
2016 ◽  
Vol 4209 (1) ◽  
pp. 1 ◽  
Author(s):  
PETER K. L. NG ◽  
PETER CASTRO
Keyword(s):  
Shallow Water ◽  
Deep Water ◽  
Nominal Species ◽  
Pacific Region ◽  
Tropical Eastern Pacific ◽  
Western Atlantic ◽  
Freshwater Streams ◽  
The Family ◽  
The World ◽  
Freshwater Habitats

The family Chasmocarcinidae Serène, 1964, is revised based on the examination of the type material of many of its species as well as unidentified and previously identified material from around the world. The revised family now consists of three subfamilies comprising 16 genera (including eight described as new) and 51 species (including 19 described as new). The subfamily Chasmocarciinae Serène, 1964, consists of Amboplax n. gen. with one species; Angustopelta n. gen. with four species, two of which are new; Camatopsis Alcock & Anderson, 1899, with six species, five of which are new; Chasmocarcinops Alcock, 1900, with one species; Chasmocarcinus Rathbun, 1898, with 11 species, one of which is new; Chinommatia n. gen. with five species, two of which are new; Deltopelta n. gen. with one species; Hephthopelta Alcock, 1899, with two species, one of which is new; Microtopsis Komai, Ng & Yamada, 2012, with two species, one of which is new; Notopelta n. gen. with one species; Statommatia n. gen. with five species, two of which are new; and Tenagopelta n. gen. with three species, two of which are new. The subfamily Megaesthesiinae Števčić, 2005, consists of Alainthesius n. gen. with two species, both of which are new; Megaesthesius Rathbun, 1909, with four species, one of which is new. The subfamily Trogloplacinae Guinot, 1986, consists of Australocarcinus Davie, 1988, with three species, and Trogloplax Guinot, 1986, with one species. A neotype is selected for Chasmocarcinus cylindricus Rathbun, 1901. Three nominal species were found to be junior subjective synonyms of other species: Chasmocarcinus panamensis Serène, 1964, of C. longipes Garth, 1940; Chasmocarcinus rathbuni Bouvier, 1917, of C. typicus Rathbun, 1898; and Hephthopelta superba Boone, 1927, of Deltopelta obliqua (Rathbun, 1898). Thirteen chasmocarcinid genera are exclusively found in the Indo-West Pacific region, one (Chasmocarcinus) in both the Western Atlantic and Tropical Eastern Pacific regions, and two (Deltopelta n. gen. and Amboplax n. gen.) exclusively in the Western Atlantic. Chasmocarcinids are remarkable for occurring from depths exceeding 1000 m to shallow water and completely freshwater habitats: chasmocarcinines and megaesthesiines are found from shallow to deep water marine ecosystems, whereas trogloplacines live in freshwater streams, including cave systems. 

Revision of the Alpheus nuttingi (Schmitt) species complex (Crustacea: Decapoda: Alpheidae), with description of a new species from the tropical eastern Pacific

Zootaxa ◽  
2007 ◽  
Vol 1577 (1) ◽  
pp. 41-60 ◽  
Author(s):  
ARTHUR ANKER ◽  
CARLA HURT ◽  
NANCY KNOWLTON
Keyword(s):  
Gulf Of California ◽  
Species Complex ◽  
Divergence Time ◽  
Color Pattern ◽  
Sister Species ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Western Atlantic ◽  
Sister Clade ◽  
Pacific Species

The Alpheus nuttingi (Schmitt, 1924) species complex consists of three species.  The only western Atlantic species, A. nuttingi, occurs from the southeastern United States to Brazil.  The two eastern Pacific species are A. galapagensis Sivertsen, 1933 (synonyms: A. canalis Kim & Abele, 1988; A. cryptodentatus Christoffersen & Ramos, 1988), which occurs from the Gulf of California to Colombia and Galapagos, and A. millsae, n. sp., presently known only from a few localities in Panama.  The three species differ morphologically, genetically, and in color pattern.  The two eastern Pacific species both can be found in the intertidal, but A. millsae, n. sp. occurs slightly deeper, suggesting the possibility of ecological speciation.  All evidence shows that A. nuttingi and A. millsae, n. sp. are transisthmian sister species, with A. galapagensis forming their sister clade.  Genetic differentiation between the transisthmian sister species suggests a divergence time of approximately 6 mya, well before the final closure of the Isthmus of Panama.

scholarly journals Gracilaria parva sp. nov. (Gracilariales, Rhodophyta) a Diminutive Species from the Tropical Eastern Pacific

Taxonomy ◽  
2022 ◽  
Vol 2 (1) ◽  
pp. 48-56
Author(s):  
D. Wilson Freshwater ◽  
Bo Williamson ◽  
Paul W. Gabrielson ◽  
Margarita Brandt
Keyword(s):  
Dna Sequencing ◽  
Eastern Pacific ◽  
Rbcl Gene ◽  
Eastern Pacific Ocean ◽  
Tropical Eastern Pacific ◽  
Type Specimens ◽  
Western Atlantic ◽  
Anatomical Features ◽  
The Many ◽  
Pacific Species

DNA sequencing of the plastid encoded rbcL gene supported by morpho-anatomical features reveals Gracilaria parva sp. nov. from Panama and Ecuador in the tropical eastern Pacific Ocean. In the rbcL phylogram, G. parva occurs in a clade sister to the western Atlantic species G. galatensis. Morphologically and anatomically, G. parva is distinguished from two similar, described tropical eastern Pacific species, G. brevis and G. veleroae by its small size, to 2.5 cm tall with branch widths mostly <2 mm occasionally to 4 mm, and by its two to three cell layered cortex. Gracilaria brevis and G. veleroae are taller, have wider branches, and a one cell layered cortex. DNA sequencing is needed to resolve the many diminutive species in the tropical eastern Pacific, particularly those occurring in turf communities. DNA sequencing of historical type specimens from the 19th and 20th centuries is also needed to correctly apply names in this region.

Patterns of morphological diversity among and within arcid bivalve species pairs separated by the Isthmus of Panama

2001 ◽  
Vol 75 (3) ◽  
pp. 590-606 ◽  
Author(s):  
Peter B. Marko ◽  
Jeremy B. C. Jackson
Keyword(s):  
Morphological Variation ◽  
Fossil Record ◽  
Eastern Pacific ◽  
Nominal Species ◽  
Western Atlantic ◽  
Isthmus Of Panama ◽  
Species Pairs ◽  
Recent Species ◽  
Discriminant Analyses ◽  
Collection Sites

Geminate species are morphologically similar sister-species found on either side of the Isthmus of Panama. The existence of all geminates in the tropical Eastern Pacific ocean and the Caribbean Sea is most often explained by vicariance: closure of the Central American Seaway 3.1 to 3.5 Ma simultaneously isolated populations of species with amphi-American distributions. In this paper, we test the potential of morphological measurements for discriminating between Recent geminate species pairs from three genera (Arca, Arcopsis, and Barbatia) in the bivalve family Arcidae and examine the prospects for distinguishing nominal species in the fossil record. Fourteen morphological variables were used to characterize shell shape and multivariate methods were used to discriminate between five Recent species pairs. Collection sites were also used as a priori groups for discrimination to describe patterns of intraspecific morphological variation and to evaluate differences among samples from different geographic regions.On average, 84 percent of specimens within geminate pairs are classified correctly following five separate discriminant analyses with nominal species as the grouping variable. Although all but one arcid species pair are discriminated with high statistical significance, some collection sites within species are highly morphologically distinct. Overall, a large proportion of specimens from each collection locality (79 percent on average) can be classified correctly to site although no single site possessed a multivariate centroid that was significantly different from all other conspecific centroids. The distinctiveness of some collection sites, however, raises the possibility that some nominal species may harbor cryptic species, indicating the need for wider geographic surveys of both molecular and morphological variation within geminate species pairs.The eigenvalue coefficients derived from the Recent samples of one geminate pair (Arca mutabilis and A. imbricata) were used to assess the potential for identifying arcid species in the fossil record. Discriminant analyses of fossil Arca indicate that the forms that characterize Recent A. mutabilis and A. imbricata are present in the fossil record as far back as the Late Early Miocene, in the Cantaure Formation of Venezuela. Because a deep water connection between the Eastern Pacific and Western Atlantic existed until the Middle Miocene, the morphological differences associated with Recent A. mutabilis and A. imbricata likely existed well before the rising Isthmus affected ocean circulation patterns in tropical America. Therefore, despite great overall morphological similarity, these putative geminate species likely have a time of divergence that is at least four times older than final seaway closure. The geographic distribution of fossils also suggests that morphological forms associated with each Recent species had amphi-American distributions both before and after isthmus formation but are now geographically restricted to either side of the isthmus in the Recent fauna.

scholarly journals REVISIÓN TAXONÓMICA DE LA FAMILIA ANTENNARIIDAE PARA COLOMBIA (PISCES: LOPHIIFORMES), INCLUYENDO UN NUEVO REGISTRO DE ANTENNARIUS

2016 ◽  
Vol 36 ◽  
Author(s):  
Luz M. Mejía Ladino ◽  
Arturo Acero P. ◽  
Luz S. Mejía M. ◽  
Andrea Polanco F.
Keyword(s):  
Common Species ◽  
Eastern Pacific ◽  
Western Atlantic ◽  
The Pacific ◽  
The Family ◽  
The Caribbean

The family Antennariidae is represented by two genera (Antennarius and Histrio) and seven species in the Western Atlantic, and by two genera (Antennarius and Antennatus) and five species in the Eastern Pacific. All the species are known from Colombian waters, with the exception of Antenanrius coccineus. In this study we review the family Antenariidae in Colombia, based on the examination of 51 specimens. Antennarius radiosus is first recorded from the Colombian Caribbean, based on two specimens collected with trawls at 20 m depth in Buritaca (Magdalena) and Isla Fuerte (Córdoba). Antennarius radiosus, Antennarius bermudensis, Antennarius multiocellatus, Antennarius ocellatus and Antennarius pauciradiatus are restricted to the Western Atlantic. The most common species found in Colombian seas are Antennarius striatus in the Caribbean and Antennarius avalonis in the Pacific. Histrio histrio is the only species with an almost circumglobal distribution. A key to identify antenariid fishes from Colombia is provided.

A review of the hyperiidean amphipod superfamily Vibilioidea Bowman and Gruner, 1973 (Crustacea: Amphipoda: Hyperiidea)

Zootaxa ◽  
2003 ◽  
Vol 280 (1) ◽  
pp. 1 ◽  
Author(s):  
WOLFGANG ZEIDLER
Keyword(s):  
Nominal Species ◽  
Minor Characters ◽  
Taxonomic Review ◽  
The Family ◽  
The World

A taxonomic review of the hyperiidean superfamily Vibilioidea is presented, based on material held by most of the major museums in the world. Three families are recognised as belonging to the superfamily. It is proposed to remove Cyllopus from the family Vibiliidae, based on the positioning of the antennae and other minor characters inconsistent with other members of the family, and to resurrect the family Cyllopodidae Bovallius, 1887 to accommodate it. Two species of Cyllopus are recognised in this review. The family Vibiliidae is restricted to two genera; Vibilia and Vibilioides. Seventeen species of Vibilia are recognised in this review, including two described as new to science. Ten nominal species of Vibilia, considered nomen dubia, are discussed. Vibilioides is considered to be monospecific. The family Paraphronimidae is currently monogeneric with two species. A key to all species is provided.

Revision of Chaetacanthus Seidler, 1922 (Annelida, Phyllodocida, Polynoidae)

Zootaxa ◽  
2020 ◽  
Vol 4885 (3) ◽  
pp. 395-422
Author(s):  
PATRICIA SALAZAR-SILVA ◽  
DANIEL A. LÓPEZ-SÁNCHEZ ◽  
SERGIO I. SALAZAR-VALLEJO
Keyword(s):  
Original Description ◽  
The Body ◽  
Eastern Pacific ◽  
Nominal Species ◽  
Tropical Eastern Pacific ◽  
Type Specimens ◽  
Central Pacific ◽  
South Central ◽  
Senior Synonym ◽  
The Caribbean

The polynoid genus Chaetacanthus Seidler, 1922 currently includes three nominal species provided with parapodial branchiae. Members of this taxon have palps with longitudinal rows of papillae, notochaetae abundant and neurochaetae spinulose. Most Chaetacanthus species were originally described as belonging to Lepidonotus Leach, 1816, and some of them were later regarded as subjective synonyms of Iphione magnifica Grube, 1876, the type species for Chaetacanthus. This species was described from the Caribbean Sea and later recorded for the tropical Eastern Pacific. After the supposed Amphi-American distribution, a revision of all available material was performed in order to clarify the generic delineation, and to improve the understanding of species systematics. Further, some non-type specimens collected in Panama allowed us to have a better understanding of the variation of elytral shape and ornamentation along the body. The type material of Polynoe brasiliensis de Quatrefages, 1866 was examined and despite its poor condition, it shows parapodial branchial filaments which were overlooked in the original description; these branchiae are also present in the holotype of I. magnifica. We identify that there are no relevant difference between both species, and they are regarded as synonyms, and Chaetacanthus brasiliensis (de Quatrefages, 1866) is newly combined and is the senior synonym. On the other hand, Chaetacanthus pilosus (Treadwell, 1937), from the Eastern Pacific, and C. pomareae (Kinberg, 1856) from the South Central Pacific are redescribed, and C. harrisae n. sp., and C. ornatus n. sp. are both newly described from the Eastern Pacific. A key to identify all species of Chaetacanthus of the World, together with an appendix for the reversal of precedence of Lepidonotus Leach, 1816 over Eumolpe Oken, 1807 are also included. 

Long-term natural and human perturbations and current status of Clipperton Atoll, a remote island of the Eastern Pacific

2006 ◽  
Vol 12 (3) ◽  
pp. 207 ◽  
Author(s):  
Christian H. Jost ◽  
Serge Andréfouët
Keyword(s):  
Coral Reef ◽  
Eastern Pacific ◽  
Current Status ◽  
Tropical Eastern Pacific ◽  
Remote Island ◽  
The World ◽  
The Future ◽  
Human Perturbations ◽  
History Of

Clipperton Atoll is one of the most isolated tropical island in the world and the only atoll of the eastern Pacific. Its outer slopes also make the largest coral reef of this region. Clipperton is a remarkable site for the geochemistry of its closed eutrophic stratified lagoon, the influence of both tropical eastern Pacific and Oceania gene pool on coral reef communities, the low diversity of the marine and land fauna, and for the equilibrium of its land ecosystem. The three components of the Clipperton Atoll seascape (coral reef-lagoon-land) all appear to have remarkable properties and history. All components experienced important changes in the last century due to anthropogenic (importation of exogenous species) or natural perturbations (closing of passes, coral bleaching). Here, we review the history of these three systems (land-lagoon-coral reef) and provide new insights of the current status of the atoll based on recent surveys and high resolution IKONOS satellite imagery. Most dramatic changes occurring in the last decades include explosion in crab Gecarcinus planatus population, almost-complete desertification of the island and increase in Masked Boobies Sula dactylatra population, making Clipperton Atoll one of the most important sites for this specie in the world. This review intends to provide a sound basis to discuss the future of Clipperton balanced between conservation and development priorities, and to raise awareness on the future of a delicate ecosystem.

scholarly journals CRUSTACEOS DECAPODOS DEL PACIFICO COLOMBIANO: LISTA DE ESPECIES Y CONSIDERACIONES ZOOGEOGRAFICAS

2016 ◽  
Vol 21 ◽  
Author(s):  
Rafael Lemaitre ◽  
Ricardo Alvarez León
Keyword(s):  
Gulf Of California ◽  
Pacific Coast ◽  
Marine Species ◽  
Eastern Pacific ◽  
Nominal Species ◽  
Review Of The Literature ◽  
Tropical Eastern Pacific ◽  
The Pacific ◽  
History Of ◽  
The Caribbean

The Pacific coast of Colombia has been poorly explored, and its fauna is one of the least known in the tropical eastern Pacific. Although knowledge of the decapod fauna from this coast has recently increased, the information is scattered in numerous sources. A review of the literature showed that 378 decapods have been reported from this coast, including the islands of Gorgona and Malpelo. The numbers of species are distributed as follows; Dendrobranchiata, 18; Caridea,79; Thalassinidea, 13; Palinura, 6; Anomura, 61; and Brachyura, 201 .Twenty-seven species are known exclusively from the Colombian coast, three of which are endemic to the islands of Malpelo or Gorgona. A list of nominal species is presented, including information on distribution, important references, and synonyms under which the taxa have been reported for this coast. A summary of the history of explorations of the Pacific coast of Colombia as it relates to decapods, is presented. Zoogeographic affinities are briefly discussed for the marine species based on published distributions. Affinities are greatest with the Gulf of California (51.8%), followed by the Galápagos (28.6%), the Indo-Pacific (8.8%), and the Caribbean- Atlantic (7.7%).

On two new species of the shrimp genus Salmoneus Holthuis, 1955 (Decapoda, Caridea, Alpheidae) from the tropical eastern Pacific

Zootaxa ◽  
2015 ◽  
Vol 3957 (5) ◽  
pp. 520 ◽  
Author(s):  
ARTHUR ANKER ◽  
JUAN FELIPE LAZARUS
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Morphological Characters ◽  
Sister Species ◽  
Eastern Pacific ◽  
Tropical Eastern Pacific ◽  
Ecological Data ◽  
Western Atlantic ◽  
Two New Species ◽  
Alpheid Shrimp

The present study deals two new alpheid shrimp species from the transisthmian Salmoneus ortmanni (Rankin, 1898) complex. Salmoneus alvarezi sp. nov. is described based on materials collected in Bahía Málaga, Colombia, and Punta Morales, Costa Rica, and is closely related to the western Atlantic S. ortmanni and S. wehrtmanni Anker, 2011. Salmoneus malagensis sp. nov. is described based on specimens from Bahía Málaga, Colombia, and beyond any doubts represents the eastern Pacific sister species of the western Atlantic S. carvachoi Anker, 2007. The two new species can be easily distinguished from each other by a number of morphological characters and colouration, and in addition appear to be ecologically separated. All previous records of S. ortmanni from the eastern Pacific are reassigned, some tentatively, to S. alvarezi sp. nov. based on description, illustrations or ecological data.

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