Paraliomera dispar ( Stimpson, 1871a )

In, First Published, 2022, Brachyuran crabs (Crustacea, Decapoda) from the remote oceanic Archipelago Trindade and Martin Vaz, South Atlantic Ocean, Zootaxa 5146, pp. 1-129 : 74

Paraliomera dispar ( Stimpson, 1871a)

( Fig. 41A, B )

Chlorodius dispar Stimpson, 1871a: 140 [Type locality: reef at Cruz del Padre , Cuba].

Trindade and Martin Vaz specimens. 2 males, 2 females ( MZUSP 41283 ), Brazil, off Espírito Santo, Trindade Island , Parcel das Tartarugas, 20º31’01.3”S, 29º17’56.9”W, J.B. Mendonça coll., 11.vii.2012, 14.5 m . 5 males ( MZUSP 41068 ), ibidem, 26.vi.2012, 9.5 m . 1 male ( MZUSP 41287 ), ibidem, 20º30’29.5”S, 29º18’37.0”W, J.B. Mendonça coll., 20.vi.2016, 8.2 m . 1 male ( MZUSP 41288 ), ( MZUSP 40829 ), ibidem, Praia do M, 20º30’50.71”S, 29º20’21.91”W, J.B. Mendonça coll., 13.ii.2019, tide pool, 0.5 m . 2 males ( MZUSP 41289 ), ibidem, Enseada da Cachoeira, Farrilhões , 20º31’22.4”S, 29º19’52.0”W, J.B. Mendonça coll., 4.iv.2014, 12.2 m . 4 males, 1 female ( MZUSP 41049 ), ibidem, 4.vii.2012, 17.9 m . 1 ovigerous female ( MZUSP 41290 ), J.B. Mendonça coll., 9.vii.2013, 10.4 m . 1 male ( MZUSP 41298 ), ibidem, Enseada Praia do Príncipe, Ilha Sul , 20º31’34.32”S, 29º19’27.98”W, J.B. Mendonça coll., 6.xi. 2014, 17.6 m . 1 male ( MZUSP 40839 ), ibidem, Praia do Noroeste , 20º29’46.4”S, 29º20’35.4”W, J.B. Mendonça coll., 30.vii.2018, 9 m . 1 male ( MZUSP 41301 ), ibidem, 20.xi.2017, 9.4 m . 1 male ( MZUSP 41303 ), ibidem, 20º29’32.3”S, 29º20’32.6”W, J.B. Mendonça coll., 22.vi.2012, 14.9 m . 10 males, 10 females (3 ovigerous) ( MZUSP 40941 ), ibidem, 20º29’48.14”S, 29º20’35.21”W, J.B. Mendonça coll., 13.ii.2019, 4 m . 1 female ( MZUSP 41324 ), ibidem, 20º30’18.72”S, 29º18’31.67”W, J.B. Mendonça coll., 26.x.2014, 9.9 m . 1 male ( MZUSP 40566 ), ibidem, 20º29’48.14”S, 29º30’35.21”W, J.B. Mendonça coll., 13.ii.2019, 4 m . 3 females ( MZUSP 41043 ) ibidem, Laje, Enseada Noroeste , 20º29’57.8”S, 29º20’39.2”W, J.B. Mendonça coll., 9.vii.2012, 17.7 m . 3 males, 1 female ( MZUSP 41050 ) , 1 female, 4 juveniles ( MZUSP 41408 ), Martin Vaz Archipelago , 20º30’45.7”S, 29º18’21.9”W, J.B. Mendonça coll., 24.vii.2013, 12.3 m .

Size of largest male: cl 4.9 mm, cw 6.9 mm; largest female: cl 5.1 mm, cw 7.5 mm.

Comparative material examined. None.

Distribution. Bermuda, Bahamas, Florida Keys, Gulf of Mexico, Antilles, Colombia, Venezuela and Brazil (Trindade and Martin Vaz, this study) ( Rathbun 1930; Garth 1978; Lemaitre 1981; Felder et al. 2009). Kempf (1970) listed Paraliomera dispar from the circalittoral zone of the northeastern Brazilian coast without further specifics. This species has not been mentioned from Brazil subsequently until now.

Ecological notes. Paraliomera dispar has been reported from coral reefs, rock pools, rubble, sand, shell, grass and mud bottoms to depths of 154 m ( Rathbun 1930; Garth 1978; Lemaitre 1981; Felder et al. 2009). In Trindade and Martin Vaz, where females have been found to be ovigerous already at cl 3.1 mm, cw 4.9 mm, P. dispar was found associated with calcareous algae and in rocky tide pools to depths of 17 m. This species is parasitized by the isopod Cancricepon choprae (see Rathbun 1924b; Markham 1979)

Remarks. The carapace is almost smooth dorsally, shining. The chelipeds are remarkably unequal; the major cheliped is provided with dense setae on the distomesial and mesioproximal surfaces of propodus and fingers, respectively; the black color of the cheliped fixed finger runs back a little on the ventral surface of the propodus ( Fig. 41A, B ). The carapace anterolateral margin is almost entire in the adult, whereas slightly toothed in the juveniles.

Figures

FIGURE 41. A, B, Paraliomera dispar (Stimpson, 1871), habitus dorsal and ventral views, respectively, male cl 4.9 mm, cw 6.9 mm (MZUSP 41301). Note in (B) dense pilose area on the mesial side of the major chelipede (arrow). C, D, Xanthias inornatus (Rathbun 1898), habitus dorsal and ventral views, respectively, female, cl 12 mm, cw 15.5 mm (MZUSP 39692). Photographs by A. Pol.