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Polycheles Nanus
''Polycheles'' is a genus of decapods within the family Polychelidae, with 9 current species assigned to it. Members of this genus are found in oceans worldwide at depths of 665 to 938 meters. Species * ''Polycheles amemiyai'' * ''Polycheles baccatus'' * ''Polycheles coccifer'' * ''Polycheles enthrix'' * ''Polycheles kermadecensis'' * ''Polycheles martini'' * ''Polycheles perarmatus'' * ''Polycheles tanneri'' * ''Polycheles typhlops ''Polycheles typhlops'' is a species of blindness, blind, deep water Decapoda, decapod crustacean with a cosmopolitan distribution. It is "one of the dominant and most characteristic crustaceans in deep-sea communities of the Mediterranean Sea". ...'' References {{Taxonbar, from=Q4486925 Polychelida Decapod genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polycheles Typhlops
''Polycheles typhlops'' is a species of blindness, blind, deep water Decapoda, decapod crustacean with a cosmopolitan distribution. It is "one of the dominant and most characteristic crustaceans in deep-sea communities of the Mediterranean Sea". Description Adult ''P. typhlops'' reach a total length of , from the tip of the rostrum (anatomy), rostrum to the end of the telson. This excludes the greatly elongated first pair of pereiopods which are normally held with the first three segments close to the side of the thorax, and the remainder held horizontal above the level of the animal's body, with the tips of the claws not exceeding the tip of the rostrum. This is thought to be an adaptation to predator, predation while partly buried in the sediment. The usual colour of the exoskeleton is whitish, orange or yellow, with the fertilised egg (biology), eggs matching the colour of the pleon where they are brooded. As in other Polychelidae, polychelids, and as implied by the generic na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decapoda
The Decapoda or decapods, from Ancient Greek δεκάς (''dekás''), meaning "ten", and πούς (''poús''), meaning "foot", is a large order of crustaceans within the class Malacostraca, and includes crabs, lobsters, crayfish, shrimp, and prawns. Most decapods are scavengers. The order is estimated to contain nearly 15,000 extant species in around 2,700 genera, with around 3,300 fossil species. Nearly half of these species are crabs, with the shrimp (about 3,000 species) and Anomura including hermit crabs, king crabs, porcelain crabs, squat lobsters (about 2500 species) making up the bulk of the remainder. The earliest fossils of the group date to the Devonian. Anatomy Decapods can have as many as 38 appendages, arranged in one pair per body segment. As the name Decapoda (from the Greek , ', "ten", and , '' -pod'', "foot") implies, ten of these appendages are considered legs. They are the pereiopods, found on the last five thoracic segments. In many decapods, one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychelidae
The family Polychelidae contains thirty-eight extant species of blind, benthic lobster-like crustaceans. They are found throughout the world's tropical, sub-tropical and temperate oceans, including the Mediterranean Sea and the Irish Sea. Anatomy The family Polychelidae is notable for the number of chelate (clawed) limbs, with either four or all five pairs of pereiopods bearing claws. This gives rise to the scientific names ''Polycheles'' (many-clawed) and ''Pentacheles'' (five claws). The first pair of periopods are greatly elongated, but often become broken off while specimens are being brought to the surface. The rostrum is very short or absent, and, although eyestalks are present, the eyes are absent. This family can be seen as evidence of the transition from shrimp-like animals to lobster-like animals, since they possess a number of primitive characters (plesiomorphies), such as the pointed telson, in contrast to the rounded telson in lobsters. Discovery Although apparent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polycheles Amemiyai
''Polycheles'' is a genus of decapods within the family Polychelidae, with 9 current species assigned to it. Members of this genus are found in oceans worldwide at depths of 665 to 938 meters. Species * '' Polycheles amemiyai'' * '' Polycheles baccatus'' * '' Polycheles coccifer'' * '' Polycheles enthrix'' * '' Polycheles kermadecensis'' * '' Polycheles martini'' * '' Polycheles perarmatus'' * '' Polycheles tanneri'' * ''Polycheles typhlops ''Polycheles typhlops'' is a species of blindness, blind, deep water Decapoda, decapod crustacean with a cosmopolitan distribution. It is "one of the dominant and most characteristic crustaceans in deep-sea communities of the Mediterranean Sea". ...'' References {{Taxonbar, from=Q4486925 Polychelida Decapod genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polychelida
Polychelida is an infraorder of decapod crustaceans. Fossil representatives are known dating from as far back as the Upper Triassic. A total of 38 extant species, all in the family Polychelidae, and 55 fossil species have been described. History Polychelida had traditionally been included in the infraorder Palinura, alongside the spiny lobsters and slipper lobsters (now in the infraorder Achelata). In 1995, Gerhard Scholtz and Stefan Richter of the carried out a phylogenetic study of the " Reptantia", and concluded that "Palinura" was paraphyletic. They therefore abandoned that taxon and introduced instead the new clade Polychelida. Classification Polychelida belongs to the group Reptantia, which consists of the walking/crawling decapods (lobsters and crabs). Polychelida is the sister clade to the infraorder Astacidea, which contains the "true" lobsters and crayfish. The cladogram below shows Polychelida's placement within the larger order Decapoda, from analysis by Wolf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
