Dairoides margaritatus Stebbing, 1920

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 : 23

Dairoides margaritatus Stebbing, 1920

( Figure 8B )

Material examined. M07, Stn. 84, 129m, ♀ 39.7× 26.1mm (IEO-CD-MZ07/1911), 16S ( MZ 424932 ), COI ( MZ 434778 ) .

Habitat and distribution. It could be an endemism of southern Africa, distributed from KwaZulu-Natal to Mozambique ( Stebbing 1920; Barnard 1950; Guinot 1967a,b; Kensley 1981; Emmerson 2016b,c) at depths between 20 to 180m ( Kensley 1981).

Results and remarks. One female specimen of Dairoides margaritatus was collected in M07 at 129m. The keys by Guinot (1967b) were used for identification.

Colouration observed. Pictures of the fresh specimen are not available.

DNA barcodes. There are not 16S and COI sequences of this species on any public database, and therefore, these are the first ones. In Genbank there are only one 16S ( HM 637979 ) and one COI ( HM 638030 ) sequences available for Dairoides kusei based in one specimen ( ULLZ 9183) from Hawaii obtained by Lai et al. (2014). The 16S sequence differs in three mutations (in 533 bp, 99.43% similarity) that could be in the intrageneric range, as well as in the case of the COI sequence varying in 58 positions (in 588 bp). The results (especially for COI sequence) of the BLAST and BOLD searches also suggest the affinity of Dairoides with Parthenopidae , as already pointed out by Lai et al. (2014).

Figures

FIGURE 8. A, Platepistoma guezei, ♀ IEO-CD-MOZ07/279; B, Dairoides margaritatus, ♀ IEO-CD-MZ07/1911 (preserved); C, Carcinoplax ischurodous, ♂ IEO-CD-MZ08/1824; D, Carcinoplax longimanus, ♂ IEO-CD-MZ08/1787; E, Carcinoplax longimanus, ♀ IEO-CD-MZ08/1851; F, Tanaoa pustulosus, ♀ IEO-CD-MZ08/1776; G, Euclosiana exquisita, ♀ IEO-CD- MZ08/1757. Scale bars: 1cm.