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The Hawaiian islands are recognized as a hotspot of biodiversity, including both surface and subsurface habitats. Recent studies of Hawaiian lava tube fauna have continued to reveal new species. Here, a new species of cave dwelling talitroid amphipod in the genus Spelaeorchestia is described from lava tubes on the island of Hawai i. It is compared with the only other known cave amphipod from the Hawaiian archipelago and with a closely related cave talitroid from Japan in the genus Minamitalitrus.
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Revision of the coral reef crab genus Tweedieia Ward, 1935 (Decapoda: Brachyura: Xanthidae)
Abstract Xanthid crabs of the genus TweedieiaWard, 1935, are among the most beautiful decapod cryptofauna in Indo-West Pacific coral reefs, with an ornate arrangement of granules and setae, in combination with an eye-catching color pattern. The genus and three recognised species (T. odhneri (Gordon, 1934), T. laysani (Rathbun, 1906), and T. brevidactylaDai & Yang, 1998) are revised, and new diagnoses and figures are provided. The COI barcoding gene of 38 specimens was sequenced and used to generate maximum likelihood and neighbor-joining trees. Tweeedieia brevidactyla is here synonymized with T. odhneri. Tweedieia now comprises only two species, differentiated by morphological characters and sequence data. Tweedieia odhneri ranges from the western Indian Ocean to the Hawaiian Islands and French Polynesia, while the rare T. laysani is only recorded from the Hawaiian Islands. These crabs appear to favor clear, oligotrophic, oceanic waters and are common on oceanic islands and rare around continents and large islands of Australasia.
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- Award ID(s):
- 1756440
- PAR ID:
- 10321096
- Date Published:
- Journal Name:
- Journal of Crustacean Biology
- Volume:
- 42
- Issue:
- 1
- ISSN:
- 0278-0372
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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- Free Publicly Accessible Full Text
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Accepted Manuscript1.0
- Journal Article:
- https://doi.org/10.1093/jcbiol/ruab081
