Cyrtomaia gaillardi Guinot & Richer de Forges, 1982

Muñoz, Isabel, García-Isarch, Eva & Cuesta, Jose A., 2021, Annotated and updated checklist of marine crabs (Decapoda: Brachyura) of Mozambique supported by morphological and molecular data from shelf and slope species of the “ MOZAMBIQUE ” surveys, Zootaxa 5056 (1), pp. 1-67 : 34-35

Cyrtomaia gaillardi Guinot & Richer de Forges, 1982

( Figures 9E,F )

Material examined. M07, Stn. 52, 556m, ♀ 67.5× 60mm ( CW × PRL) (IEO-CD-MZ07/1925) ; M08, Stn. 39, 631m, ♂ 62× 59.9mm (IEO-CD-MZ08/1788); M09, Stn. 27, 543m, ♂ 66× 64.5mm (IEO-CD-MZ09/1807); M09, Stn. 32, 529m, ♂ 63× 57.3mm (IEO-CD-MZ09/1808), 16S ( MZ 424952 ) .

Habitat and distribution. This species is distributed in Madagascar, Nicobar Island and Indonesia ( Guinot & Richer de Forges 1982a).

Results and remarks. The specimens were identified following the key of Guinot & Richer de Forges (1982a,b, 1984, 1986). Four specimens of Cyrtomaia gaillardi were studied, that had been collected during the three surveys (M07, M08 and M09), at depths between 529 and 631m. Although this species was recorded off Madagascar ( Guinot & Richer de Forges 1982a), it is not registered in any checklist of the area ( WIO) ( Barnard, 1950; Emmerson 2016b,c; Kensley 1981; Poupin 2010, 2018), being C. murrayi Miers the only species of this genus cited in the area. Therefore, these specimens are the first record of C. gaillardi in Mozambique waters. Subsequently, in April 2009, one specimen was collected during the MB-exp ( GBIF.org 2021, unpublished record).

Colouration observed. Specimens were light orange, with whitish finger tips, dactylus and proximal region of the merus.

DNA barcodes. There are not 16S sequences available for this genus in Genbank, except for a short sequence of 164 bp of Cyrtomaia owstoni deposited by Komai et al. (2019) that fits 100% with the 16S sequence (552 bp) of C. gaillardi . Considering the short length of the sequence and the low number of mutations expected at congeneric level nothing could be concluded. According to Guinot & Richer de Forges (1982a), C. owstoni has long branchial spines, these being the longest of the dorsal side of carapace, while protogastric spines are the longest in C. gaillardi . These clear morpholofical features make it difficult to confuse both species. Unfortunately, not COI sequence was obtained, although in any case there is not any COI sequence available in Genbank or BOLD for comparison.

Figures

FIGURE 9. A, Oxypleurodon difficilis, ♂ IEO-CD-MZ08/1774; B, Naxioides robillardi, ♀ IEO-CD-MZ07/1892; C, Samadinia galathea, ♂ IEO-CD-MZ09/1802-1; D, Samadinia pulchra, ♂ IEO-CD-MZ07/1893; E,F, Cyrtomaia gaillardi, ♂ IEO-CD- MZ08/1788; G, Platymaia alcocki, ♂ IEO-CD-MZ08/1789. Scale bars: 1cm.