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Stenopodidea
The Stenopodidea or boxer shrimps are a small group of decapod crustaceans. Often confused with Caridea shrimp or Dendrobranchiata prawns, they are neither, belonging to their own group. Anatomy They can be differentiated from the Dendrobranchiata prawns by their lack of branching gills, and by the fact that they brood their eggs instead of directly releasing them into the water. They differ from the Caridea shrimp by their greatly enlarged third pair of legs. Taxonomy Stenopodidea belongs to the order Decapoda, and is most closely related to the Caridea and Procarididea infraorders of shrimp. The cladogram below shows Stenopodidea's relationships to other relatives within Decapoda, from analysis by Wolfe ''et al.'', 2019. There are 71 extant species currently recognized within Stenopodidea, divided into 12 genera. Three fossil species are also recognized, each belonging to a separate genus. The earliest fossil assigned to the Stenopodidea is '' Devonostenopus pennsylvani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Macromaxillocarididae
''Macromaxillocaris bahamaensis'' is a species of Stenopodidea, stenopodidean shrimp, the only species in the family Macromaxillocarididae. It is a troglobite, known only from an anchialine pool in a cave in the Bahamas. It differs from other stenopodideans by the enlargement of its third maxilliped. Description The holotype of ''M. bahamaensis'' has a total length (TL) of (carapace length, CL, ); the paratype is smaller at TL , CL . In common with other troglobitic species, the body lacks pigments, and the eyes are vestigiality, vestigial. Like other stenopodideans, ''Macromaxillocaris'' has chela (organ), chelae (claws) on the first three pairs of pereiopods (walking legs); it differs from them by the size of the third maxilliped, which is greatly enlarged in ''Macromaxillocaris'', and is the strongest of all the animal's appendages. Distribution and habitat ''Macromaxillocaris bahamaensis'' is the first species discovered among the Stenopodidea to be adapted to a troglobite, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |