Decapoda - Brachyura - Aethridae - Osachila

Osachila antillensis Rathbun, 1916

World Distribution
Poupin (1994, Etudes & Thèses). Western Atlantic. Cuba, Lesser Antilles (St Croix, Montserrat, Guadeloupe, Dominica, Martinique, St Vincent, Barbados, Grenada), Brazil (Alagoas). 80-300 m.
Felder et al. (2009) - 80-300 m. Ber, GMx, Antil, Brz

Environnement : Marine - Substrat/Association : Hard bottom (rock and rubbles)

Vertical range : Shallow to deep-waters (e.g. 10-190 m) - Min-Max observed: 80-300 m

Lesser Antilles data
Distribution: WA, Bermuda, Gulf of Mexico, Antilles, Brazil. Lesser Antilles, VGI (St Croix), ICA (Montserrat, Guadeloupe, Dominica, Martinique, St Vincent, Barbados, Grenada). 80-300 m.
Osachila antillensis - Rathbun, 1933: 104, St Croix. - Rathbun, 1937: 251, St Croix, Montserrat, Dominica, Barbados, Grenada. - Poupin, 1994: 41, Guadeloupe [R/V Polka, 250 m, det. M. Tavares (MNHN)].
Osachila antillensis - Guadeloupe, Karubenthos 2012, det. J. Poupin October 2013, 1 F 18.1x20.1 mm, st. GN22, 16 May 2012, 16°25'N, 61°33'W, 120 m (no MNHN, lot JL879, probably the same as MNHN-IU-2013-14513 at GN27); st. GN16, 11 May 2012, 16°05.18'N, 61°46.71'W, 75 m, MNHN IU-2013-4545, lot JL333 [det. E. Macpherson, Besse 2013, as O. tuberosa, re-det. Poupin October 2013 as O. antillensis]; also listed in Paris collection, August 2016, MNHN-IU-2013-14513, st. GN27, 120 m.
Osachila antillensis - Guadeloupe, Karubenthos II 2015, field det. J. Poupin, st. DW4579, 17 June 2015, 16°19.2'N, 60°54.12'W, 264-228 m, MNHN-IU-2013-18975.
Comment: this species was already collected during Karubenthos 2012 between 75-120 m with new minimum depth set at 75 m instead of 80 m previously. Osachilla antillensis is very similar to Osachila tuberosa Stimpson, 1871 also present in Guadeloupe. The distinction between the two species in Rathbun (1924: 248, pl. 77, fig. 2-3) is made according to the aspect of the carapace either 'wholly eroded' (O. antillensis) or 'partly eroded' (O. tuberosa). Otherwise these two species are very similar and perhaps conspecific.

Comment(s) on data
Based on the eroded/not much eroded aspect of carapace, it seems that both O. antillensis/O. tuberosa are present in Guadeloupe, and that some lots have been confused, i.e. MNHN-IU-2013-4545, det. Besse, mars 2013, GN14, JL333, as O. tuberosa, has an eroded carapace and is probably O. antillensis.

References : PDF list, 214 pp (1.4 Mo)

This species in Worms Database