Pilumnidae

Belongs within: Heterotremata. The Pilumnidae are a family of benthic crabs commonly known as hairy crabs, due to many species bearing a covering of long setae. One less hairy subgroup, the Eumedoninae, lives as symbionts of echinoderms such as sea urchins. Characters (from Davie 2002): Carapace hexagonal, transversely rectangular or transversely ovate; dorsal surface convex,… Continue reading Pilumnidae

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Categorised as Decapoda

Menippidae

Belongs within: Heterotremata. The Menippidae are a family of marine crabs found in habitats ranging from coastal mangrove swamps to depths of over 800 m (Davie 2002). Characters (from Davie 2002): Carapace xanthoid in shape, hexagonal to transversely oval or subrectangular; dorsal surface with regions moderately distinct or indistinct; granular or smooth, sometimes with distinct… Continue reading Menippidae

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Categorised as Decapoda

Parathelphusidae

Belongs within: Gecarcinucidae. The Parathelphusidae are a family of freshwater crabs found from southern Asia to New Guinea. A crab out of water Published 23 October 2015 Crabs are, of course, one of the most instantly recognisable groups of crustaceans. We all know what they look like, and we all know where can find them:… Continue reading Parathelphusidae

Trapeziidae

Belongs within: Heterotremata. The Trapeziidae are a family of small crabs that live as symbionts of cnidarians, usually corals. They feed on mucus from the coral, as well as detritus and zooplankton captured by the host. Characters (from Schwietzer 2005): Carapace cordate, not much wider than long, length averaging about 86% maximum carapace width, position… Continue reading Trapeziidae

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Categorised as Decapoda

Euphausiacea

Belongs within: Eumalacostraca. The Euphausiacea, krill, are reasonably sized (generally some centimetres long) pelagic, shrimp-like crustaceans. They are best known for their role in the marine ecosystem as food for larger animals, due to their habit of forming large swarms. Characters (from Ax 2000): Carapace fused to first eight thoracomeres, forming cephalothorax (lateral folds of… Continue reading Euphausiacea

Amphipoda

Belongs within: Eumalacostraca.Contains: Ingolfiellidae, Physocephalata, Physosomata, Pardaliscoidea, Phoxocephaloidea, Ampelisca, Oedicerotidae, Dexaminidae, Cyproideidae, Haustoroidea, Synopioidea, Eusiridae, Paramphithoidae, Melphidippoidea, Senticaudata, Leucothoidea, Liljeborgioidea, Lysianassidae, Stegocephalidae, Acanthonotozomatidae. The Amphipoda are a large group of crustaceans found in both marine and fresh water with a relatively small number of terrestrial species. Most species are strongly laterally compressed and the legs… Continue reading Amphipoda

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Categorised as Amphipoda

Mysidacea

Belongs within: Eumalacostraca.Contains: Mysida. The Mysidacea are small, mostly marine shrimp-like crustaceans with an extensive carapace covering part of the first thorax section but originally connected to only one thoracic segment. There is some doubt as to whether the two major living groups, the Lophogastrida and Mysida, actually form a monophyletic unit. Lophogastrida differ from… Continue reading Mysidacea

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Categorised as Mysidacea

Liljeborgioidea

Belongs within: Amphipoda. The Liljeborgioidea are a group of mainly marine and brackish-water amphipods, with some species found in freshwater hypogean habitats. Characters (from Bousfield 1983): Mandibular left lacinia mobilis basically 5-(rarely 4-)dentate; sternal gills (when present) single, mid-ventral; gnathopods usually weakly or not sexually dimorphic, dactyls with elongate unguis. <==Liljeborgioidea |–SebidaeR86 | |–Seborgia Bousfield… Continue reading Liljeborgioidea

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Categorised as Amphipoda

Acanthonotozomatidae

Belongs within: Amphipoda. The Acanthonotozomatidae are a family of marine amphipods, particularly common in the Antarctic region. Many acanthonotozomatids are relatively large and spinose. Characters (from Hurley 1954): Integument more or less indurated, processiferous. Head rostrate. Side-plates well developed, 1st-4th usually acuminate. Eyes well developed. Antennae I and II seldom elongate or very different in… Continue reading Acanthonotozomatidae

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Categorised as Amphipoda

Hadziida

Belongs within: Senticaudata.Contains: Eriopisidae, Cheirocratidae, Calliopiidae, Pontogeneiidae, Metacrangonyctidae, Hadziidae, Melitidae, Maera. The Melitoidea are a group of gammaroid amphipods found mostly in marine and brackish water. Characters (from Bousfield 1977, as Melitoidea): Body not carinate or rostrate, toothed on abdomen only (rarely on peraeon); urosome dorsal spine groups weak or lacking; sexual dimorphism strongly expressed… Continue reading Hadziida

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Categorised as Amphipoda