Ramus Of Uropod Research Articles

A molecular phylogeny of Pseudocrangonyx from Japan, including a new subterranean species (Crustacea, Amphipoda, Pseudocrangonyctidae)

A subterranean species of pseudocrangonyctid amphipod, Pseudocrangonyx gudariensis Tomikawa & Sato, sp. n., is described from the spring-fed stream Gudari-numa in Hakkoda Mountains, Aomori Prefecture, northern Japan. Pseudocrangonyx gudariensis is morphologically similar to P. coreanus Uéno, 1966 and P. febras Sidorov, 2009 based on its relatively small body size, small number of articles of rami of pleopods, and urosomite 1 without basal setae. However, P. gudariensis is distinguished from those species based on the following characteristics: from P. coreanus, antenna 2 of female without calceoli, palmar margins of gnathopods 1 and 2 with distally notched robust setae, inner margin of inner ramus of uropod 2 with 4 robust setae, and basal part of inner ramus of uropod 2 without slender seta; and from P. febras, carpus of gnathopod 2 without serrate robust setae on posterodistal corners, peduncle of pleopods 1 and 2 with setae, and longer article 2 of uropod 3. Phylogenetic analyses using nuclear 28S rRNA and histone H3, and mitochondrial cytochrome c oxidase subunit I and 16S rRNA markers showed that P. gudariensis is placed among known Pseudocrangonyx Akatsuka and Komai, 1922 species. However, its exact phylogenetic position within the genus could not be determined. The polyphyly of the Japanese Pseudocrangonyx species indicates that multiple colonization events of Pseudocrangonyx ancestors to the Japanese Archipelago could have occurred. The reliability of the past Pseudocrangonyx records from Japan is briefly discussed.

ONE NEW SPECIES OF THE FAMILY NIPHARGIDAE FROM BOSNIA AND HERZEGOVINA (CONTRIBUTION TO THE KNOWLEDGE OF THE AMPHIPODA 289)

From the subterranean waters of the Velika Bukovička špilja Cave near Bukovica village (Tomislavgrad region, Bosnia and Herzegovina) is described and figured one new species of the family Niphargidae (Amphipoda, Gammaridea), Niphargus bukovicensis, sp. n. This species is characterized by presence of elevated number of spines on dactylus of pereopods 6 and 7 only, by numerous setae along dactylus outer margin of gnathopods 1-2, pointed epimeral plate 3 and by elongated inner and outer ramus of uropod 3 in males. The taxonomical relation of this species regarding other similar members of genus Niphargus Schiödte, 1849, is discussed.

New records of Nuuanuidae (Crustacea: Amphipoda: Senticaudata) from Korean waters, with descriptions of one new genus and two new species

ABSTRACTThe family Nuuanuidae Lowry and Myers, 2013 is first reported from Korean waters by the discovery of Nuuanu paracyclodactyla sp. nov. and Parvipalpus gen. nov., erected with the description of Parvipalpus holocaudatus sp. nov., along with their detailed descriptions and illustrations. The monotypic genus, Parvipalpus gen. nov., is characterized by the bi-articulate mandibular palp, the uni-articulate outer ramus of uropod 3, and no cleft telson. The new species, Nuuanu paracyclodactyla sp. nov., is very similar to Gammarella cyclodactyla (Hirayama, 1978) in the peculiar shape of propodus and dactylus on gnathopod 2 in mature males, but the former is distinguished readily by the absence of dorsal keels on the pleons and urosomite 1. New keys to genera of this family and to species of the genus Nuuanu are provided.

Thermoarcturidae, a new crustacean family of three genera (Isopoda: Valvifera).

A new family Thermoarcturidae of valviferan isopod is erected for three genera, Califarcturus n. gen., Spinarcturus Kensley, 1978 and Thermoarcturus Paul & Menzies, 1971, each represented by one species. All share strong stiff setae on distal articles of pereopods 2-4, uropods with two rami, and a tomentum of fine setae over the cuticle. The members are distinguished from Antarcturidae, Arcturididae, Rectarcturidae and Arcturidae, similar arcturoid families that differ in having rows of filter setae on pereopods 2-4 and usually lack one or more uropodal rami.

Three new species of the Eriopisa group (Crustacea: Amphipoda: Eriopisidae) from Japan, with the description of a new genus.

Three new species of the Eriopisa group (Crustacea: Amphipoda: Eriopisidae) are described from coastal areas in Japan. Paraflagitopisa gen. nov. is established with P. excavata sp. nov. as its type species. This new genus is characterized by (1) entire lateral cephalic lobe, (2) unfused flagellum of antenna 2, (3) 3-articulated mandibular palp, (4) carpus of gnathopod 1 longer than propodus, (5) transverse palm of gnathopod 1, and (6) slender outer ramus of uropod 3 with long second article, and can be distinguished from the closely related genus, Flagitopisa, by the article 2 of mandibular palp longer than article 3, the undilated bases of pereopods 3-4, and the slender inner ramus of uropod 3. Psammogammarus lobatus sp. nov. is characterized by (1) male gnathopod 2 with excavated palm, (2) posterodistally projected bases of pereopods 5-7, (3) quadrate posteroventral corner of pleonal epimeron 3, (4) short inner ramus of uropod 3, and (5) article 2 of uropod 3 outer ramus longer than article 1. Victoriopisa wadai sp. nov. has the following characters: (1) eyes absent, (2) peduncle of antenna 1 not heavily setose, (3) accessory flagellum with 1-2 articles, (4) flagellum of antenna 2 composed of 2 long and 3 short articles, (5) gnathopod 2 in both sexes with excavated palm, (6) merus of pereopod 7 moderately expanded, and (7) ventral margin of pleonite 2 slightly setose. Key to species of the Eriopisa group in Japan is provided.

Three new species of Hirondellea (Crustacea, Amphipoda, Hirondelleidae) from hadal depths of the Peru-Chile Trench

Three new species of Hirondellea are described from hadal depths of the Peru-Chile Trench in the southeast Pacific: Hirondellea sonne sp. nov., Hirondellea thurstoni sp. nov. and Hirondellea wagneri sp. nov. The main diagnostic characters distinguishing these species are: the shape of the lateral cephalic lobes; the shape of the epistome; the shape and orientation of the palm of gnathopods 1 and 2; the shape of the posteroventral corner of epimeron 3; and the presence or absence of an incision on the outer ramus of uropod 2. This brings the known number of species in the genus to 20. The new species are fully described and illustrated, and are diagnosed against all other species in the Hirondelleidae. A key to the world species is provided.http://zoobank.org/urn:lsid:zoobank.org:pub:02BC79A0-FE30-4FE5-A8B8-2EC131C1342C

Hyalella cenotensis, a new species of Hyalellidae (Crustacea: Amphipoda) from the Yucatán Peninsula, Mexico.

In this study the first blind species of Hyalella for Mexico is described; it is the second in the genus to be recorded there. The new species is closer to the eyeless species: H. anophthalma Ruffo, 1957, H. muerta Baldinger, Shepard & Threloff, 2000, H. caeca Pereira, 1989, H. spelaea Bueno & Cardoso, 2011 in Cardoso et al. 2011, H. imbya Rodrigues & Bueno, 2012 in Rodrigues et al. 2012, but with no curved seta at the inner ramus of uropod 1, antennae 1 shorter than antennae 2, no apical setae on the telson and a characteristic dorsoposterior carina and three pappose setae on the inner plate of maxilla 1. The morphological intraspecific variations that can be found in this genus are discussed.

<i>Stebbingiella</i> Marques-Junior & Senna, 2013 in the family Paragammaropsidae (Crustacea, Amphipoda, Senticaudata)

The genus Stebbingiella Marques-Junior & Senna, 2013 was recently established in the family Melphidippidae Stebbing, 1899. Stebbingiella does not fit this family concept for a number of reasons which include: antenna 1 accessory flagellum well developed; callynophore absent; maxilla 1 inner plate with apical robust setae; maxilla 2 inner plate without oblique setal row; coxae discontiguous; gnathopod 2 sexually dimorphic, enlarged in males; pleonites without dorsal carinae; epimera absent; uropodal rami linguiform or lanceolate; uropod 3 with short peduncle, rami longer than peduncle; telson dorsoventally thickened.

Hirondellea namarensis (Crustacea: Amphipoda: Lysianassoidea: Hirondelleidae), a new deep-water scavenger species from the Mid-Atlantic Ridge

A new species of the deep-sea scavenging genus Hirondellea (Crustacea: Amphipoda) is described from bathyal depths in the Azores region and on the Mid-Atlantic Ridge. The new species belongs to a group of Hirondellea species which possess an incised inner ramus of uropod 2 and an anteriorly directed spine on epimeron 1. It can be distinguished from other members of this group by a combination of characters: the gnathopod 1 and 2 palm shape; the broadly rounded epimeron 3; the longer telson and broadly rounded head lobe; and the broadly rounded epistome. The species most closely resembles H. wolfendeni, from which it can be distinguished by the shape of the propod of gnathopod 2 and the length of the pereopod 7 propodus. An updated key to the genus Hirondellea is provided.

Iphinotus lisaen. sp. (Crustacea, Amphipoda, Phliantidae) from Western Australia

The new species Iphinotus lisae is described from Western Australia. It is similar to Iphinotus typicus (Thomson, 1882) which predominately occurs on the coast of New Zealand and around the Aukland Islands. The new species can be discriminated from Iphinotus typicus by its elongate antenna 1, the rounded basis lobe of pereopod 7 and lacking ramus of uropod 3. (© 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

A Phylogeny and Classification of the Senticaudata subord. nov. Crustacea: Amphipoda)

The Amphipoda includes a large clade defined by the presence of a previously unrecognised synapomorphy, apical robust setae on the rami of uropods 1-2. We term this clade the Senticaudata subord. nov. (Latin: sentis = thorn). It includes almost all freshwater species as well as a number of marine benthic taxa, formerly part of the 'Gammaridea'. The phylog-eny of the senticaudates was determined by cladistic analysis of morphological characters and character states. Within the suborder Senticaudata there are six infraorders: Carangoliopsida, Talitrida, Hadziida, Corophiida, Bogidiellida and Gam-marida. A classification is provided and all the senticaudate families are diagnosed. We introduce for the first time in am-phipod classification, the level parvorder between infraorder and superfamily. Four new families are described: Kairosidae; Eriopisidae; Nuuanuidae and Kergueleniolidae.

The first hypothelminorheic Crustacea (Amphipoda, Dogielinotidae, Hyalella) from South America.

Most of known troglobiotic species occur in caves and subterranean environments from great depths. However, recently more attention has been given to other subterranean environments, such as the hypothelminorheic habitats. It comprises the most superficial among all subterranean habitats. This kind of environment is characterized by the constant presence of wet spots, absence of light and very particular abiotic characteristics, comprising unique species. The first hypothelminorheic Amphipoda from South America is here described, a new species of the genus Hyalella which occurs in a wetland on Southern Brazil. The new species differs from other troglobiotics of the genus by the presence of a curved seta on the inner ramus of uropod 1 and elongation of appendices, as the first pair of antennae and peraeopods 6 and 7. However, human impacts in the area where the new species occurs have changed heavily their habitat, which may have led the species to a critical level of threat or even extinction, demonstrating the fragility of this environment.

Austromesocypris bluffensis sp. n. (Crustacea, Ostracoda, Cypridoidea, Scottiinae) from subterranean aquatic habitats in Tasmania, with a key to world species of the subfamily

Austromesocypris bluffensis sp. n. is described and we report another species, Austromesocypris sp., both collected from subterranean aquatic habitats in Tasmania. This discovery adds a major taxonomic group to the already diverse invertebrate cave fauna of Tasmania, and is of interest because, globally, obligate subterranean aquatic species (stygobites) are poorly represented within the family Cyprididae. The genus Austromesocypris Martens, De Deckker & Rossetti, 2004 is otherwise known to comprise entirely “terrestrial or semi-terrestrial” species. The second species is not described because only juvenile specimens were collected. Both species stand apart from their congeners by the carapace shape, which is rectangular in Austromesocypris bluffensis and triangular and asymmetrical in the unnamed species. Another unique feature of the new species is the almost symmetrical uropodal rami. We also identify some broader systematic issues within the Scottiinae including the position of two New Zealand species, Scottia audax (Chapman, 1961) and Scottia insularis Chapman, 1963 in the genus, and point out their closer relationship to the Gondwana genera of Scottiinae, Austromesocypris and Mesocypris Daday, 1910, than to the Palearctic genus Scottia Brady & Norman, 1889, based on the morphology of the maxillula and mandibula. The identity of the Australian records of Scottia audax (Chapman, 1961), Austromesocypris australiensis (De Deckker, 1983) and the Boreal records of Scottia pseudobrowniana Kempf, 1971 are all considered doubtful. A key to the world species of Scottiinae is provided.

A new species of Kamaka (Amphipoda: Kamakidae) from Lake Tonle Sap, Cambodia

Kamaka tonlensis sp. nov. is described from Lake Tonle Sap, Cambodia. This species is peculiar in having no marginal setae onthe outer ramus of uropod 2 and relatively elongate dactylus of male gnathopod 1. It brings the number of species of Kamaka up to 13.Keywords. Crustacea, Amphipoda, Kamakidae, Kamaka tonlensis, new species, Cambodia, Lake Tonle Sap

First record of Mothocya melanosticta Schioedte and Meinert, 1884 (Isopoda: Cymothoidae) from Egyptian pinecone soldierfish with special reference to its infestation status

Cymothoidae are cosmopolitan, ubiquitous, and nonspecific parasites of fish of different biotopes causing a significant economic loss to fisheries either by killing and stunting or simply by damaging their hosts. This study represents the first record of Mothocya melanosticta from the Red Sea, with a new host record in Myripristis murdjan (pinecone soldierfish), the other resident species of the fish-parasitic isopod family Cymothoidae in Egypt. The recovered Mothocya melanosticta was of moderate body size (17.7 × 8.2 mm) and had a cephalon with widely truncated rostrum, short pleotelson with uropod rami not extending beyond the telson, and the presence of a small rounded protrusion ranging in size from 0.3 to 0.5 mm on the lateral side of pereonite II. The overall prevalence was 31.25% and it was only found in the branchial cavity. The monthly and seasonal variation in infestation is reported.

First Record of Gammarus koreanus (Crustacea, Amphipoda, Gammaroidea) from Japan, Based on Morphology and 28S rRNA Gene Sequences

Gammarus koreanus Ueno, 1940, which was originally described from the Korean Peninsula, is recorded from freshwaters of the Goto Islands, Japan. This is the first record of its occurrence in Japan. Molecular analyses using partial sequences of the 28S rRNA gene strongly support the identity of Japanese populations with G. koreanus. The Japanese specimens differ from the original description of this species in the following features: antenna 2 lacking calceoli, inner margins of inner and outer rami of uropod 3 with plumose setae, and outer margin of outer ramus of uropod 3 without plumose setae. These differences are regarded as intraspecific variation.

Taxonomic Studies on the Talitridae (Crustacea: Amphipoda) of Taiwan. V. The Genus Brevitalitrus Bousfield, 1971

[The terrestrial amphipod genus Brevitalitrus Bousfield, 1971 (Talitridae) is represented by seven previously described species. In this study, two species of the genus are reported for the first time from Taiwan: B. hortulanus (Calman, 1912) collected from the terrestrial habitat of Green Island (=Lu Tao) and B. kumanoi sp. nov. from the coastal areas of Nan Bay of the mainland and Lanyu Island. Among its congeners, this latter species is most similar to B. nesius (Barnard, 1960) and B. toli (Barnard, 1960) in lacking marginal spines on the outer rami of uropods 1 and 2 and in having the propodus of pereopod 6 subequal in length to the basis. It differs from B. nesius in having the posterodistal lobe of the basis of pereopod 7 hardly incised at junction, the posterior margin of epimeral plate 3 gently convex, and the distolateral spine of uropod 1 simple, and from B. toli by the distally narrowing basis of pereopod 7, the rami of pleopod 2 that are shorter than the peduncle, and the triarticulate rami of pleopod 3. Brevitalitrus kumanoi sp. nov. also differs from B. hortulanus in having the peduncle of pleopod 3 subequal in width to those of pleopods 1 and 2 and the outer rami of uropods 1 and 2 without marginal spines. Special attention is paid to the armature of the dactyli of pereopods 3-7 and the sub-categories of the cuspidactylate state. The terms uni-cuspidactylate and bi-cuspidactylate are proposed to better express the relationship of species in the genus. An identification key to all known species of the family Talitridae from Taiwan is provided., The terrestrial amphipod genus Brevitalitrus Bousfield, 1971 (Talitridae) is represented by seven previously described species. In this study, two species of the genus are reported for the first time from Taiwan: B. hortulanus (Calman, 1912) collected from the terrestrial habitat of Green Island (=Lu Tao) and B. kumanoi sp. nov. from the coastal areas of Nan Bay of the mainland and Lanyu Island. Among its congeners, this latter species is most similar to B. nesius (Barnard, 1960) and B. toli (Barnard, 1960) in lacking marginal spines on the outer rami of uropods 1 and 2 and in having the propodus of pereopod 6 subequal in length to the basis. It differs from B. nesius in having the posterodistal lobe of the basis of pereopod 7 hardly incised at junction, the posterior margin of epimeral plate 3 gently convex, and the distolateral spine of uropod 1 simple, and from B. toli by the distally narrowing basis of pereopod 7, the rami of pleopod 2 that are shorter than the peduncle, and the tri-articulate rami of pleopod 3. Brevitalitrus kumanoi sp. nov. also differs from B. hortulanus in having the peduncle of pleopod 3 subequal in width to those of pleopods 1 and 2 and the outer rami of uropods 1 and 2 without marginal spines. Special attention is paid to the armature of the dactyli of pereopods 3–7 and the sub-categories of the cuspidactylate state. The terms uni-cuspidactylate and bi-cuspidactylate are proposed to better express the relationship of species in the genus. An identification key to all known species of the family Talitridae from Taiwan is provided.]

Two new species of cirolanid isopods (Crustacea: Isopoda: Cirolanidae) from Qeshm and Kish Islands in the Persian Gulf

Two new species of cirolanid isopods, Baharilana kiabii sp. nov. from the western coasts of Qeshm Island and Cirolana tarahomii sp. nov. from the northern cost of Kish Island and the western coasts of Qeshm Island in the Persian Gulf are described. Baharilana kiabii sp. nov. is characterized by pleonite 5 with a median projection and a pleotelson with two longitudinal, parallel ridges and small tubercles on the dorsal surface. Cirolana tarahomii sp. nov. is distinguished by a lateral margins of the frontal lamina converging slightly towards the base, the distal margin is extended with a narrowly rounded apex; appendix masculina distally acute with bifid apex, pleotelson with a broadly rounded apex and 8 marginal robust setae, uropodal rami not deeply bifid.

A new species of Pseudharpinia (Amphipoda: Haustorioidea: Phoxocephalidae) from Southeastern Brazilian continental shelf

A new species of the amphipod family Phoxocephalidae Sars, 1895, Pseudharpinia tupinamba sp. nov., is described from southeastern Brazilian continental shelf. The new species is closely related to the type-species of the genus, P. dentata Schellenberg, 1931 described from Magellan Province, and was misidentified as the latter species by some authors in the past. Pseudharpinia tupinamba sp. nov. differs from P. dentata by the number of articles in the accessory flagellum of antenna 1, ratio of length and width of the propodus of pereopod 6, size of the posteroventral lobe of the basis of pereopod 7, presence of slender setae in posterior margin of epimeral plate 3, presence of a corona of cuticular spines in dorsodistal margin of peduncle of uropod 2, ratio of length of the inner ramus and the first article of outer ramus of uropod 3, ratio of length and width of the telson, and presence of slender setae on the lateral margins of telson. The new described species is the unique of this genus known from the Brazilian continental shelf.

A New Species of the Genus Ingolfiella Hansen, 1903 (Peracarida, Amphipoda) From The Ogasawara Islands, Southern Japan

A new ingolfiellid amphipod, Ingolfiella ogasawarensis n. sp. is described from shallow water off the Ogasawara Islands, southern Japan. The new species differs from its congeners primarily by having a moderately thick body; pereionites 2-7, pleonites 1-3, and urosomites 1-3 each bearing a pair of dorsal setae; a broad dorsal crest on the basis of gnathopod 1; 6 minute teeth, 1 long stout palmar angle spine, 1 short stout seta, and 8 slender simple setae on the ventral margin of the carpus of gnathopod 2; propodi of pereiopods 3 and 4 longer than the carpi; uropod 1 shorter than uropod 2; and the first spine on the inner ramus of uropod 1 larger than the following three spines.