New Amphipod Species Research Articles

Syntopy in rare marine interstitial crustaceans (Amphipoda, Ingolfiellidae) from small coral islands in the Molucca Sea, Indonesia

Ingolfiella botoi, a new species of ingolfiellid amphipod, is described in syntopy with the recently described I. moluccensis from the coarse coral sand interstitial medium of the Gura Ici Islands (Molucca Sea, Indonesia). The new taxon is unique among ingolfiellideans in the display of a multidenticulate unguis on P5–P6. The new species shares most character state resemblances with I. quadridentata Stock 1979, from coarse sublittoral sands up to 4 m depth in Curacao (Leeward Antilles). This is the third record of syntopy among members of this elusive group of stygobiont amphipods.

A new species of Socarnes Boeck, 1871 (Crustacea, Amphipoda, Lysianassidae) from Korean waters

A new species of lysianassid amphipod belonging to the genus Socarnes Boeck was collected from Korean coastal waters. This is the first record of the genus Socarnes from Korea. The new species is fully illustrated and extensively compared with related species. A key to Socarnes speciesis provided.

A new species of freshwater amphipod (Dogielinotidae, Hyalella) from Southeastern Brazil

To the present 57 species of Hyalella were described for Americas, 15 of them found in Brazil, which is among the most diverse countries for this genus. This work aims to describe a new Hyalella species with benthic habits which is found in a water source on Southeastern Brazil. It is mainly characterized by a wide truncated process formed near the dactylus insertion on gnathopod 2, besides both coxal and sternall gills present on pereonits 2 to 7. This work improves the knowledge on biodiversity about Hyalella species.

The Caprellidea (Crustacea: Peracarida: Amphipoda) from the Gulf of Mexico with a description of a new species of <i>Paracaprella</i>

A new species of caprellid amphipod of the genus Paracaprella is described and illustrated in detail. All the material reported was collected from coral rubble samples from the Arrecife Tuxpan/Lobos Protected Natural Area, off Veracruz State, Mexico, WSW Gulf of Mexico. The new species is characterized by large eyes; article 2 of peduncle of antenna 2 with a distoventral process; body dorsally setose; large subrectangular projection on the anteroventral margin of pereonite 2; basis of gnathopod 2 elongate and thin with a proximal knob on posterior margin, propodus longer than broad, with a robust grasping spine, and a large and robust tooth distally; and pereopods 5, 6 and 7 with several long plumose setae. The new species increases the numbers of Paracaprella species recorded around the world to 8, and the caprellid species from the Gulf of Mexico to 16. All caprellid amphipod species documented from this gulf inhabit the coastal zone and six in the deep sea. In addition, the number of caprellid species decreases along the bathymetric gradient: 15 species on the littoral zone, 6 on the continental shelf, 5 on the continental slope, and 3 on the abyssal plain.

Gammarus baysali sp. nov., a new freshwater amphipod species from Turkey (Amphipoda: Gammaridae)

A new species of freshwater amphipod, Gammarus baysali sp. nov., collected from Cumayanı Cave (Zonguldak Province, Turkey) is described and illustrated. The new species belongs to the Gammarus pulex-group. The most discriminant characters of this species are the minute eyes, densely setose fifth peduncle and flagellar segments of antenna 2, elongated pereopods, and setose anterior margins of pereopod 5 to 7. Additionally, the palp of right maxilla 1 has 4 setae along its outer margin. A detailed morphological description and illustrations of the new species are provided, and differences from related species are discussed.

Metopelloides paguri sp. nov., a new species of symbiotic stenothoid amphipod (Crustacea: Amphipoda: Stenothoidae) associated with sublittoral hermit crabs from the Russian coasts of the Sea of Japan

Metopelloides paguri sp. nov., a new species of symbiotic stenothoid amphipod (Crustacea: Amphipoda: Stenothoidae) associated with sublittoral hermit crabs from the Russian coasts of the Sea of Japan

First records of peracarid crustaceans from the Cayo Matias Ocean Blue Hole, SW Cuba, with the description of two new species

First records of peracarid crustaceans obtained from the Cayo Matías Ocean Blue Hole, southwestern Cuba, aredocumented. In addition, two new species of isopod and amphipod are herein described. Gnathia micheli n. sp. (Isopoda,Gnathiidae) and Boca normae n. sp. (Amphipoda, Aristiidae) were associated with filamentous algae at a depth of 20 m.Both represent the first report for a blue hole and the amphipod constitutes the first record of the genus for Cuba and theCaribbean Sea. Three other isopods, i.e. Gnathostenetroides sp., Cirolana parva, and Cirolana crenulitelson, and the cumacean Procampylaspis sp. are documented for the first time from the same blue hole.

Sinocorophium hangangense sp. n. (Crustacea, Amphipoda, Corophiidae), a new species from Korea, with a key to the genus Sinocorophium

A new species of the corophiid gammaridean amphipod belonging to the genus Sinocorophium Bousfield & Hoover was collected from the lower reaches of the Han River in Gyeonggi-do, Korea. A relatively large body size and morphology of the uropods 1 and 3 are the major characteristics which serve to distinguish the new species from its congeners. The new species is fully illustrated and extensively compared with related species. A key to the species of (Sinocorophium is also provided.

Metopelloides paguri sp. nov., a new species of symbiotic stenothoid amphipod (Crustacea: Amphipoda: Stenothoidae) associated with sublittoral hermit crabs from the Russian coasts of the Sea of Japan

A new species of amphipod from the genus Metopelloides Gurjanova, 1938 (Crustacea: Amphipoda: Stenothoidae) asso-ciated with two species of sublittoral hermit crab species, Pagurus pectinatus (Stimpson, 1858) and Elassochirus cavi-manus (Miers, 1879) (Crustacea: Decapoda: Paguridae), is described from the Russian coasts of the Sea of Japan. The newspecies clearly differs from the congeners by the combination of morphological features such as telson without lateralspines, an elongated mandibular palp with single apical setae, the structures of distoventral palmar margins of subchelaon gnathopods I and II in females, bright white-red body coloration. Thus, the record of Metopelloides paguri sp. nov.represents the second record of the family Stenothoidae in the association with sublittoral hermit crabs from the Sea of Japan.

A new freshwater amphipod species, Gammarus katagani sp. nov., from Turkey

A new species of freshwater Amphipod, Gammarus katagani sp. n., collected from Domaniç in Kütahya province, Turkey, is described and illustrated. The new species belongs to the Gammarus balcanicus-group. The presence of an additional row of setae on the last two meta-some segments in both sexes is the most diagnostic character for the species. A detailed morphological description and illustrations of the new species are given and differences from related species are discussed.

A new freshwater amphipod species, Gammarus obruki sp. nov., from Turkey (Amphipoda: Gammaridae)

A new species of freshwater amphipod, Gammarus obruki sp. nov., collected from İnderesi Cave, Bartın Province, Turkey, is described and illustrated. The new species belongs to the Gammarus pulex group. The most discriminant characters of this species are the presence of prolonged extremities, a very long antenna 1 (up to 52 segmented flagellum), densely setose fifth peduncle and flagellar segments of antenna 2, and a fourth peduncle segment that has no long setae. A detailed morphological description and illustrations of the new species are provided and differences from related species are discussed.

A new species of amphipod, Megamphopus katagani sp. nov. (Crustacea: Peracarida: Photidae) from the Sea of Marmara (Turkey), with a key to the species of Megamphopus in the North Atlantic, Mediterranean and associated Seas

A new species of amphipod, Megamphopus katagani sp. nov. (Crustacea: Peracarida: Photidae) from the Sea of Marmara (Turkey), with a key to the species of Megamphopus in the North Atlantic, Mediterranean and associated Seas

Exitomelita sigynae gen. et sp. nov.: a new amphipod from the Arctic Loki Castle vent field with potential gill ectosymbionts

The newly discovered deep-sea hydrothermal vent field ''Loki's Castle'' at 2,350 m depth at 70N on the Knipovich Ridge north of the island Jan Mayen is the only known black smoker field from the Arctic Ridge system. This vent field holds a unique fauna clearly distinct from vent sites along the Mid-Atlantic Ridge south of Iceland. In addition to numerous maldanid and ampharetid polychae- tes one animal of particular interest at this vent site, is a new genus and species of melitid amphipod. This new species is found in cracks and crevices on vent chimneys as well as in areas where diffuse venting is common such as the base of vent chimneys. Here, we present a formal morphological description of this new melitid species and hypothesize about the main form of its nutrition using stable isotope and molecular data.

Bogidiella veneris, a New Species of Subterranean Amphipoda (Bogidiellidae) from Australia, with Remarks on the Systematics and Biogeography

Abstract A new species of subterranean amphipod, Bogidiella veneris, from Venus Bay, South Australia is described. The species was found in a groundwater observation well drilled in an aeolianite limestone formation only 500 m from the seashore. The discovery of the new bogidiellid amphipod is one of the outcomes of a three year stygofauna survey in South Australia. Bogidiella veneris is the fourth species of Bogidiellidae from the Australian region.

A new species of amphipod, Megamphopus katagani sp. nov. (Crustacea: Peracarida: Photidae) from the Sea of Marmara (Turkey), with a key to the species of Megamphopus in the North Atlantic, Mediterranean and associated Seas

A new species of amphipod, Megamphopus katagani sp. nov., is described from the sea of Marmara (Turkey). A key to the species of Megamphopus known from the North-East Atlantic, Mediterranean and associated seas is provided.

First South American Phreatogammarid, with Comments on the Arrangement of Coxal and Sternal Gills, and on the Biramous Condition of the Seventh Pereiopod in Amphipods

Abstract Ruffia patagonica, a new genus and species of phreatogammarid amphipod, is described from a coastal cave on Madre de Dios Island (Chilean Patagonia). This is the first record of the family outside continental waters of New Zealand and New Caledonia. The new taxon displays some of the more distinctive features of the family, such as gnathopods with the palm margin lined with numerous unicuspid robust setae and with a denticulated inner margin of the dactylus; fifth pereiopod clearly smaller than pereiopod six and seven; “coxal gill” ( = exopod) absent from the seventh pereiopod; oostegites broadened; urosomites with posterodorsal robust setae; and third uropod equiramous with an elongated peduncle and with unsegmented cylindrical rami, the latter provided with numerous robust setae. In addition, the sternites of all pereionites, pleonites, and urosomites show a portion of integument delimited by hyaline frill that is presumably osmoregulatory in function, and is equivalent to the pair of sternal ...

Gammarus kesanensis sp. nov., a new blind amphipod species from Turkey (Amphipoda, Gammaridae), with a key to eyeless Gammarus species of Europe

A new blind species of freshwater amphipod, Gammarus kesanensis sp. nov., collected from Erikli Fountain, Keşan, Turkey, is described and illustrated. The new species belongs to Gammarus pulex- group and is the fourth blind species of the group reported from Europe and Turkey. A detailed morphological description and illustrations of the new species are given and differences from related species are discussed. In addition, a key to the blind/eyeless species of Gammarus genus of Europe is presented.

Melitidae, the Eriopisella group

A new species of eriopisellid amphipod, belonging to the genus Netamelita Barnard, 1962, is described. This is the first and only amphipod from the Eriopisella group reported from the Great Barrier Reef.

Lysianopsis adelae, new species of amphipod (Gammaridea: Lysianassidae) from the Veracruz Coral Reef System, SW Gulf of Mexico

A new species of amphipod of the genus Lysianopsis from the Veracruz Coral Reef System, SW Gulf of Mexico is described. Lysianopsis adelae n. sp., was collected in the sediments at the base of the sponge Aplysina fistularis at a depth of 10 m. The differences among L. alba, L. hummelincki, and L. ozona, recorded from Gulf of Mexico and Caribbean Sea are pointed out and they are compared with the new species.

Especie nueva de anfípodo comensal (Amphipoda: Gammaridea: Leucothoidae) del Parque Nacional Sistema Arrecifal Veracruzano, SO del golfo de México

A new species of commensal amphipod of the genus Leucothoe (Leucothoidae) is described from the Veracruz coral reef system, Veracruz, in the SW Gulf of Mexico. The specimens were collected from the sponge Aplysina fistularis at a depth of 10 m. The new species is compared to other closely related species of Leucothoe . Coxa 2 with acute anterior corner; propodus of gnathopod 2 with 7 long subapical setae, 27-28 thick medial setae arranged in 1 row, and 7 short submarginal setae; segment 2 of mandible palp with 5 setae and distal margin serrate; last segment of maxilliped palp with distal nail and inner margin covered with small spinules; telson triangular, trifid distally, including 2 apical setae and 2 pairs of medial pairs of plumose setae, are the main characteristics of Leucothoe hortapugai .