Decapoda - Brachyura - Epialtidae - Hyastenus
| Hyastenus uncifer Calman, 1900 |
World Distribution
Griffin & Tranter (1986 : 137) - Indonesia, Banda, Sumatra, Timor and Christmas Island. Also Comoros (Mayotte), ?French Polynesia (Marquesas) pre-det from photo only.
Emmerson (2016, vol. 3, 462) - Mozambique, subtidal to 300 m
Environnement : Marine - Substrat/Association : Hard bottom (rock and rubbles)
Vertical range : Deep (more than 100 m) - Min-Max observed: 1-300 m
Mayotte data
Hyastenus uncifer Calman, 1900
Material examined — Mayotte KUW 2009, st. 12c, reef Prévoyante by night, 6-12 m, 1 F rostre compris 21,6 (with rostral horns) x 5,9 mm, MNHN B32558, MNHN-IU-2009-1318; st. 20b, Ilot M'tzamboro, platier Ouest, 10-15 m, 2 MM 16.1 x 5.1 mm and 18.2 x 5.7 mm, 1 F 17.6 x 5.9 mm, MNHN B32559, MNHN-IU-2009-1319; st. 23, Choizil pass, "Patate à Teddy", 15-30 m, 1 M 10.5 x 3.7 mm, MNHN B32560, MNHN-IU-2009-1320; st. 24, Ilot Handrema, Nord, 6-12 m, 1 M 30.5 x 7.9 mm, MNHN B32561, MNHN-IU-2009-1321; st. 25, south Islet M'tzamboro, 15-20 m, 1 M 20.9 x 5.9 mm, MNHN B32562, MNHN-IU-2009-1322.
Remarks — Mayotte specimens have long horns a characteristic of the Hyastenus crabs belonging to the borradailei group including H. borradailei (Rathbun, 1907), H. brockii de Man, 1887, and H. uncifer Calman, 1909. They are attributed to H. unciger because of the presence of a long intestinal spine on posterior carapace. In the nearby Seychelles, Serène (1977: 48) as reported H. borradailei.
Geographic and depth ranges — IWP, Mozambique, Mayotte (this work) to Indonesia, Christmas Island; subtidal to 300 m (Mozambique and 300 m from Griffin, 1974, cited in Emmerson, 2016).
Réunion data
Hyastenus uncifer - Réunion. Photo A. Diringer, 2010. Det J. Poupin from photo only. - Coll. BIOLAVE, 27/11/2011, shallow-waters, divers 10-30 m, det. J. Poupin 25/01/2013 (strong intestinal spine present).
Central Pacific data (Wallis & Futuna, Polynesia, Clipperton, Easter Island)
Hyastenus aff. uncifer - AAMP, Marquesas, 2012, Leg 2, St. 2, Nuku Hiva, 20 m, coll. Evans, sample 0036, 1 female 11.7x8.1 mm, 1 male 12x8.4 mm; Leg 3, St. MQ2-GR, Nuku Hiva, 20-23 m, coll. Stamer et al., sample LC2 (photo), LC4, LC15 (photo ?), LC19, St. MQ19-B, Hiva Oa, 10-25 m, coll. Albenga et al., sample LC217; pre-det. J. Poupin based on long intestinal spine (near median posterior margin of carapace).
References : PDF list, 214 pp (1.4 Mo)This species in Worms Database