Decapoda - Brachyura - Euryplacidae - Frevillea

Frevillea barbata A. Milne-Edwards, 1880

World Distribution
Castro & Ng (2010, Zootaxa) - Western Atlantic from the Gulf of Mexico and Florida to Grenada, West Indies. Depth: subtidal to 300 m. 55-201 m in Felder et al. (2009). 300 m extented to 379/428 m with present observations.

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

Vertical range : Shallow to deep-waters (e.g. 10-190 m) - Min-Max observed: 1-300 m

Lesser Antilles data
Distribution (Castro & Ng, 2010): WA, Florida and Gulf of Mexico. Lesser Antilles, ICA (Guadeloupe, Barbados, Grenada). ?subtital/55-300 m.
Goneplax barbata - Rathbun, 1918: 26, Grenada [R/V Blake, st. 262, off Grenada, 92 fathoms]. - Rathbun, 1921: 75, Barbados [Barbados-Antigua Expedition 1918].
Frevillea barbata - Poupin, 1994: 48, Guadeloupe [R/V Polka, 95 m, det. M. Tavares (MNHN), this entry attributed to F. hirstuta in Castro & Ng (2010: 53), without justification; see Comment]. - Castro & Ng, 2010: 53, synonymie, distribution.
Frevillea barbata - Guadeloupe, Karubenthos 2012, det. J. Poupin October 2013, st. GN20, 15 May 2012, 16°25'N, 61°34'W, 258 m, MNHN-IU-2013-14499 (as F. hirsuta, JL812, 1 F ov. 15.4x21.1 mm).
Frevillea barbata - Guadeloupe, Karubenthos II 2015, field det. J. Poupin, st. CP4517, 9 June 2015, 16°24.4'N, 61°34'W, 178–185 m, MNHN-IU-2013-18821; st. CP4624, 26 June 2015, 15°56.23'N, 61°30.67'W, 242–243 m, MNHN-IU-2013-19111; st. DW4630, 27 June 2015, 15°48.07'N, 61°28.81'W, 428–379 m, MNHN-IU-2013-19097 [this specimen out of previous depth range and with reduced coloration on fingers of chelae; perhaps a juvenile].
Comment: Castro & Ng (2010: 53) have discussed the similarities between Frevillea barbata, Frevillea hirsuta (Borradaile, 1916) and Frevillea rosaea A. Milne-Edwards, 1880. They indicate that the 'supposed' diagnostic characters for these species are ambiguous and that additional material is needed to clarify their taxonomic status. Based on their morphology and coloration the specimens collected around Guadeloupe during Karubenthos 2012 (258 m) and 2015 are obviously conspecifics. As the three Frevillea species are currently without confident diagnoses these specimens are attributed herein to F. barbata because that species will have priority if the three Fevillea species are ultimately considered as synonyms.
Guinot et al., 2013: 284, Frevillea barbata A. Milne-Edwards, 1880, male cw 5.9 mm, “cotype”, Gulf of Mexico, Blake, (MNHN-B8733); males 16.6 × 24.9 mm, 15.5 × 23.3 mm, Guadeloupe (MNHN-B30601)

Comment(s) on data
Frevillea babarta and F. hirsuta are 2 species that cannot be confidently separated by using the key given by Rathbun (1918: 25), according to Castro & Ng (2010: 53, Zootaxa). These authors do not indicate additional characters that can be used to separate these 2 species with similar morphology (especially setation on carpus of cheliped and proximal part of outer face of palm). Morphological characters used to attribute specimen from Guadeloupe Island to F. hirsuta instead of F. barbata (first id. in Poupin, 1994) need to be clarified. Castro & Ng (2010: 53) indicate - The length of the tomentum, and even its presence, is a variable character among many species of euryplacids so the use of this to separate species is questionable. The collection of additional material, particularly of F. rosaea, should clarify the status of all three putative species of Frevillea. As such, no diagnoses are given below for each of the three species of Frevillea given the ambiguous character of their supposed diagnostic characters -

References : PDF list, 214 pp (1.4 Mo)

This species in Worms Database