Huysia bahamensis Jaume, Boxshall, & Iliffe, 1998
Taxonomic Characterization: Huysia bahamensis is the only described species of this genus. The genus Huysia is characterized by "the unique combination of a derived 2-segmented endopod in leg 1 and a plesiomorphic 1-segmented endopod in leg 5 of both sexes" (Jaume, Boxshall, and Iliffe, 1998). This genus/species has the following characteristics:
Ecological Classification: Stygobitic
Size: Adult females' length range from 0.60 to 0.62 mm. The adult male allotype was 0.50 mm long.
Number of Species in Genus: One
Species Range: Known only from Norman's Pond Cave, Norman's Pond Cay,
Exuma Cays, Great Bahama Bank, Bahamas
Closest Related Species: It is the only species within the genus. Huysia is very closely related to three other genera - Speleophria, Speleophriopsis, and Protospeleophria. The most closely related genus/species is Protospeleophria lucayae Jaume, Boxshall & Iliffe, 1998. It was also discovered in Norman's Pond Cave and was described with H. bahamensis.
Habitat: Anchialine limestone cave
Ecology: Fully marine salinity waters (35-37 g/l). Found free swimming in the water column at a depth of 10-25 m. Certain morphologic characteristics are indicative of taxa that temporarily burrow into loose sediments. These characteristics include a "laterally compressed prosome, the lobe on the proximal part of the antennules, the modified articulations between the posterior abdominal somites. . .and the stout distal setae on the swimming legs" (Jaume, Boxshall, and Iliffe, 1998).
Life History: Not known. Four copepodids were collected but not described.
Evolutionary Origins: Misophrioid copepods are believed to be composed of two ancestral lineages - Archimisophria and Misophira (Boxshall, 1989). The taxonomic characteristics of the loss of the aesthetasc from the ancestral antennulary segment XVIII and the loss of one inner seta from the second endopodal segment of leg one indicates that H. bahamensis is of the Archimisophria lineage. However, H. bahamensis retention of its biramous fifth legs is characteristic of the Misophira lineage.
Conservation Status: Restricted to a single cave in the Exuma Cays.
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