Biology
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The fact that large adults, but notably no specimens carrying eggs, have been found further from the sea coast than juveniles could indicate a dependence on anchialine/marine habitats for reproduction, and also that juveniles migrate inland to mature (3).
Nothing else is known of this Bermuda cave amphipod's biology.
Conservation
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There are currently no conservation measures underway targeting this species.
Description
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This is a colourless, eyeless amphipod that lacks a rostrum. The upper lip is broadly rounded and the lower lip has large inner lobes (2).
Habitat
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Found in a wide range of anchialine limestone cave and groundwater habitats throughout the entire salinity range, although most frequently in low salinity areas. Juveniles are found far closer (11-180 m) to the sea coast than adults (147-853 m) (2).
Range
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Recorded from wells, waterworks and cave waters in Hamilton, St. George's, Devonshire, Paget, Smith's and Warwick Parishes, Bermuda, including Church, Wonderland, Admiral's and Government Quarry Caves (2).
Status
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Classified as Critically Endangered (CR) on the IUCN Red List 2006 (1).
Threats
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The threats to this species are unknown.
Pseudoniphargus grandimanus
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Pseudoniphargus grandimanus: Brief Summary
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Pseudoniphargus grandimanus is a species of crustacean in family Hadziidae. It is endemic to Bermuda.
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