Topic
Polycopidae
About: Polycopidae is a research topic. Over the lifetime, 5 publications have been published within this topic receiving 36 citations.
Papers
TL;DR: Eight new species from the DIVA II expedition of the RV “Meteor” at the Cape, Angola, and Guinea basins are presented here, and a key to genera of the family Polycopidae is provided.
Abstract: Polycopidae Sars, 1866 ostracods from the DIVA II expedition of the RV “Meteor” at the Cape, Angola, and Guinea basins are presented here. They were collected between 26 February and 30 March 2005, from depths between 5,047 and 5,150 m. Metapolycope divae sp. nov. belongs to the subfamily Polycopsisinae Chavtur, 1983, and stands apart from the other representatives of the genus by the morphology of the uropodal lamellae. The remaining eight new species described herein belong to the subfamily Polycopinae Sars, 1866. The genus Archypolycope Chavtur, 1981 is represented in the investigated area by four new species: A. atlantica sp. nov., A. brandtae sp. nov., A. louisi sp. nov., and A. martinezi sp. nov. With the addition of these four new species, this genus is redefined to include six Recent and three fossil species. Archypolycope atlantica is the only representative in the family with six bristles ventrally on the first segment of the mandibula. The other three new species stand apart by the specific shell ornamentation, chaetotaxy of the maxillula, and morphology of the uropodal lamellae. Archypolycope cornea Chavtur, 1981 and A. rotunda Chavtur, 1981, both described from the abyssal depths of the Kuril-Kamchatka trench, are here excluded from the genus. The decision is based on the absence of the peculiar morphology of the fifth limb endopod, which is shared by all other Archypolycope. These species are transferred to the genus Pseudopolycope Chavtur, 1981, because they have a fifth limb endopod consisting of a segment and one terminal bristle, but are placed in separate new subgenus Divacope subgen. nov. The new subgenus differs from the nominotypical subgenus by a much shorter fusion of the two bristles on the Bellonci Organ, and by the presence of hooks on the male antenna. Besides Pseudopolycope (D.) cornea (Chavtur, 1981) comb. nov. and P. (D.) rotunda (Chavtur, 1981) comb. nov, the subgenus has been defined to include one more member: P. (D.) chavturi sp. nov., which is also described from the deep South Atlantic and designated the type species of the new subgenus. It is most closely related to P. (D.) cornea, but differs from it by the chaetotaxy of the antennula and morphology of the exopod mandibula. Two new species, P. (P.) quasivitjazi sp. nov. and P. (P.) spio sp. nov., from the deep South Atlantic are added to the nominotypical subgenus, which now has 15 Recent species. One of the new species described here could not be accommodated into any of the known Polycopinae genera, so the new genus Hyphalocope gen. nov. was erected for it, and defined by the following autapomorphies: completely flat dorsal margin of the shell, presence of the bifurcated bristles on the shell, elongated antennula, and very long Bellonci Organ. Presently, Hyphalocope dorsoithys gen. et sp. nov. is known only from females. We provide a key to genera of the family Polycopidae, and keys to species of the genera Metapolycope, Archypolycope, and Pseudopolycope. In order to learn about the phylogenetic relationships and to point out some current problems of polyphyletic and paraphyletic genera in the subfamily Polycopinae, we perform a cladistic analysis based on 29 morphological characters scored for 91 Recent species. Two species from the genus Metapolycope are chosen as outgroups. Extensive discussion on the distribution and suitability of morphological characters in this family is also provided. All Recent species of Polycopidae are listed at the end, with information about their geographic and bathymetric distributions, habitat, presence of sexes, and body length.
13 citations
TL;DR: The 18S gene proved to be suitable for phylogenetic analyses in polycopids with high intraspecific or intrageneric resolution and was supported in the divergence between Kliecope and Parapolycope with high bootstrap values.
13 citations
TL;DR: A new species is described, Parapolycope koreanasp.
Abstract: Parapolycope Klie, 1936 belongs to the family Polycopidae, one of the ecologically most diverse and mor-phologically most primitive ostracod families. Due to the small size of animals, polycopids are poorlystudied and unknown in many regions of the world. We describe a new species, Parapolycope koreanasp. nov., from marine beach interstitial in Gyeongsangnam-do, South Korea. This is the first representa-tive of the genus, and the first named polycopid species from Korea. It is very closely related to severalspecies from marine interstitial in Japan, but differs mainly in the shape and ornamentation of the shelland morphology of the male upper lip. A cladistic analysis of the genus Parapolycope is performed totest the phylogenetic relationships between species. Although Parapolycope presently encompasses 18species, only 15 are included in the analysis, because Parapolycope seridentata (Hartmann, 1959), Parapoly-cope ramunchensis (Hartmann-Schroder and Hartmann, 1962), and Parapolycope minutissima (Hartmann,1974) differ so much from other congeners that they should be excluded from the genus. The analysisis based on 27 morphological characters, with Parapolycopissa rossica (Chavtur, 1977) and Polycopiellamicrodentata Chavtur, 1979 as two outgroup taxa. In spite of the fact that descriptions of almost half ofspecies included in the analysis are based on a limited set of morphological characters, the majority ruleof the 15 equally parsimonious trees undoubtedly shows that there are at least two distinct lineages inthe genus, defined by the number of claws on the female uropodal lamellae. A close relationship betweenthe new species and the Japanese congeners is also strongly supported. We redescribe the type speciesof the genus, Parapolycope germanica Klie, 1936, based on the type material, and designate the lectotypeand paralectotypes. A key for identification of Parapolycope species is provided, along with a map of theirdistribution. This is a cosmopolitan taxon, with the centre of diversity in the Northwest Pacific region.
6 citations
TL;DR: This is the first description of a living polycopid species from the deep Southern Ocean and differs from other 18 Recent Pseudopolycope Chavtur, 1981 species by a peculiar morphology of the structures between claws on the uropodal lamellae.
Abstract: Polycopids are one of the most diverse and often very abundant ostracod group in the deep sea. The true diversity of polycopids today inhabiting this environment, however, is very poorly known, because most of the studies identify ostracod material to the genus level, and they are based on the shell characters only. In this paper we describe Pseudopolycope (Pseudopolycope) andeep sp. nov. collected during the ANDEEP-SYSTCO I expedition in 2007 in the Atlantic Sector of the Southern Ocean. The new species was collected from 2,063 m depth. It differs from other 18 Recent Pseudopolycope Chavtur, 1981 species by (1) a peculiar morphology of the structures between claws on the uropodal lamellae; (2) morphology of the mandibular exopod; and (3) ornamentation of the shell. This is the first description of a living polycopid species from the deep Southern Ocean.
2 citations
TL;DR: Using a morphological (shell shape and ornamentation) and molecular barcoding approach (28S rDNA), this work provides the first report of the biodiversity of ostracods in the mesophotic coral ecosystems of northeastern Caribbean.
Abstract: The taxonomy and ecology of ostracods in the Caribbean remain incomplete, even though they are among the most successful and ubiquitous microcrustaceans of marine ecosystems. In an effort to enhance our knowledge of the biodiversity, abundance, and distribution of benthic ostracods, several sediment samples were collected from mesophotic coral ecosystems (MCEs) of Puerto Rico and U.S. Virgin Islands at different depths (30–102 m) using technical diving. The highest densities of ostracods were found in the deepest samples (≥61 m), and these were the most abundant and diverse assemblages. All ostracods collected belong to the subclasses Myodocopa Sars and Podocopa Sars. Myodocopa was represented by the families Cypridinidae Baird, Polycopidae Sars, Sarsiellidae Brady & Norman, Rutidermatidae Brady & Norman, Cylindroleberididae Muller, and Philomedidae Muller. On the other hand, Podocopa was represented by the following families: Bairdiidae Sars, Pontocyprididae Muller, Candonidae Kaufmann (subfamily Paracypridinae Sars), Macrocyprididae Muller, Loxoconchidae Sars, Xestoleberididae Sars, Cytherellidae Sars and Cytheromatidae Elofson. The subclass Podocopa showed the highest number of individuals and species. There was a ~100 % correspondence between morphologically identified species and genetically defined species through a short region of the nuclear large subunit ribosomal DNA, which was shown to be appropriate for species recognition and discrimination in ostracods. Using a morphological (shell shape and ornamentation) and molecular barcoding approach (28S rDNA), we provide the first report of the biodiversity of ostracods in the mesophotic coral ecosystems of northeastern Caribbean.
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| Year | Papers |
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| 2017 | 1 |
| 2014 | 1 |
| 2013 | 2 |
| 2012 | 1 |