Bahadzia setimana Stock, 1986
Taxonomic Characterization: Amphipod lacking eyes and pigment. B. setimana can be distinguished from other Bahadzia by the following characteristics by:
A key to the genus is presented in
Jaume & Wagner, 1998.
Disposition of Specimens: Zo÷logisch Museum Amsterdam collection
number ZMA Amphipod 107.882-3.
Ecological Classification: Stygobitic
Size: The female allotype is 7.2 mm and the male holotype is 5.5 mm.
Number of Species in Genus: Nine (8 anchialine and 1 freshwater), all stygobitic
Genus range for Bahadzia
Species Range: Known only from Stargate Blue Hole, South Andros Island,
Great Bahama Bank, Bahamas.
Closest Related Species: B. stocki. The genus Bahadzia is restricted to the West Indies and Mexico. All species are closely related, and it is unclear if they are distinct species or are subspecies (Stock, 1986). The only freshwater species, B. latipalpus, has the most distinct morphology, while the anchialine species more closely resemble each other.
Habitat: Anchialine limestone cave.
Ecology: Free-swimming at a depth of 35 m in brackish water (18 ppt) below the halocline. Bacterial growth at the halocline may provide a primary food resource for the associated cave fauna.
Life History: Unknown. Most amphipods carry their eggs and juveniles in a brood pouch. They do not have larvae or resting stages. These attributes affect their dispersal capacities and thus, contribute to their endemism.
Evolutionary Origins: The genus Bahadzia is phylogenetically with Mayaweckelia and Tuluweckelia. "It may be an ancient relict derived from an early hadziid fauna in the old Tethyan seaway" (Holsinger et al., 1986).
Conservation Status: Restricted to a single cave; only a single female and male specimen have been collected.
Contributor: John R. Holsinger, Old Dominion University, Norfolk, VA
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