Dromia bollorei Forest, 1974

Souza-Filho, Jesser Fidelis De, 2017, Deep sea decapod crustaceans of São Pedro and São Paulo Archipelago, Equatorial Atlantic, Brazil, Zootaxa 4324 (2), pp. 331-347 : 336-339

Dromia bollorei Forest, 1974

( Figure 4 )

Dromia bollorei Forest, 1974: 91 , fig. 1d, 2, 3d, 5, 6b, 7c, d; pl. 2, fig. 1,2; pl. 3, fig. 4; pl. (5, lig. 1).— Maning & Holthuis, 1981: 11.— McLay, 1993: 151 (key).— Guinot & Tavares, 2003: 94: fig. 27b.— Cleva et al., 2007: 240 , fig. 8c.—Ng et al., 2008: 33.

Material examined. Nine specimens ( Table 4; 6♀ / 3♂), MOUFPE 15258 , São Pedro e São Paulo Archipelago (0°54'787''N e 29°21' 451''W), 420 and 546 m, December 2013.

Diagnosis. Carapace and pereopods pilose. Carapace front with two strong triangular teeth apically blunt; mesobranchial region with two humps, the innermost being particularly prominent. Anterolateral edge with four strong teeth, three of which are regularly conic: the first and the third slightly larger and the fourth shorter and wider than the previous ones, with a very lateral orientation; the second tooth is also conical, with its posterior margin with obsolete projection, corresponding to the accessory tooth. Chelipeds relatively strong and very elongated in large males specimens, with merus exceeding at least half of the length of the anterolateral edge of the carapace. Palm elongated, with its height in the middle portion ranging from 2.6 to 3 times total length; fixed finger strongly deflected in males, weaker in females. Second and third pereopod rather long and slender. Pereopod 2 propodus with ratio of the length and height close to 3. Pereopods 4 and 5 short, especially in large males. Pereopod 5 folded laterally on the shell, and far from reaching the tooth. Female sternal grooves end together between sternite 5.

Distribution. Known only from Mauritania and Ivory Coast, at 100 m ( Manning & Holthuis, 1989). This is the first record of this species for the São Pedro e São Paulo Archipelago, increasing their range in the equatorial region.

Remarks. The specimens analyzed in this study showed the main diagnostic characters described by Forrest (1974), such as: frontal teeth triangular and strong, mesobranchial region with two humps, first, second and forth anterolateral teeth conic and strong, the third and females with sternal grooves which end together between sternite 5 (figure 5). However, comparing our material with photographs of the types series, holotype female - MNHN-IU- 2008-11166, paratypes: 1 female MNHN-IU-2008-11162, 1 male MNHN-IU-2008-11163, (available on line at http://coldb.mnhn.fr/catalognumber/mnhn/iu/2008-11166), the lateral spines of carapace are less acute.

Nine individuals were collected, three of them being male and six female. The carapace length ranged from 51.6 to 68.5 mm, and the width from 63.1 to 83.7 mm. All specimens were covered with marine sponges, a characteristic of the species, which is, for this reason, known as "sponge crab".

Figures

FIGURE 4. Dromia bollorei (Forest, 1974), female collected off São Pedro e São Paulo Archipelago, Brazil, MOUFPE 15258. Scale bars 10 mm