Amboplax peresi

Ng, Peter K. L. & Castro, Peter, 2016, Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea), Zootaxa 4209 (1), pp. 1-182 : 28-30

Amboplax peresi (Rodrigues da Costa, 1968)

( Figs. 5 A, B; 22F, G; 28H; 37E, F; 50G; 57D; 66D‒F; 85C; 89I)

Chasmocarcinus peresi Rodrigues da Costa 1968: 335, unnumb. pl., figs. 1‒4 [type localilty: Brazil, Bahia].— Coelho & Ramos 1972: 195 [in list].— Gomes-Corrêa 1972: 11 [in list].— Melo 1996: 419 [in key], 421, unnumb. fig. [ Brazil] ; 1998: 494 [in list].—Coelho & Coelho 1998: 801, 812, 813 [Brazil].— Coelho et al. 2008: 12 [in list].—Ng et al. 2008: 76 [in list].

Chasmocarcinus sp. B— Coelho et al. 1980: tables XII, XIV, appendix II [in lists; Brazil]; 1986: 94 [in list; Brazil]; Barreto et al. 1991: 291 [in list]; 1993: 651 [in list] (see Coelho & Coelho 1998: 812).

Type material (not examined). Lectotype male (DOUFPE 561) (M. Tavares, personal communication) Brazil, Bahia, off Abrolhos Bank , 17°56.9’S, 38°40.9’W, 19 m.

Paralectotypes. 8 males, 8 females (see Melo et al. 2003: 431), Calypso , stn 1816, 17°56’S, 38°40'W (MZUSP 8230; see Melo et al. 2003: 431); 3 paralectotype males, 5 paralectotype females (MZUSP 8747), Calypso , stn 1815, 17°56’S, 38°40'W.

Material examined. Brazil. 1 male (5.1 × 6.4 mm), 1 ovigerous female (4.9 × 6.2 mm) ( ZRC 2015.217 , ex MZUSP 32380 ), 19°33’S, 39°34’W, 34 m, bottom with dead shells, stn 52/CB 90, TAAF MD 55/ Brésil 1987, Expedition Museúm Paris-USU/ Rio de Janeiro, 29.05.1987.

Diagnosis. As for genus.

Remarks. According to Coelho & Coelho (1998: 800), some of the type material used by Rodrigues da Costa (1968) to describe Chasmocacinus peresi actually belonged to C. arcuatus Coelho & Coelho, 1998 .

The male specimen drawn by Rodrigues da Costa (1968: unnumb. pl., figs. 1‒4) is of an unknown specimen (no legend). The characters shown in the drawing, particularly the stout G1, are nevertheless characteristic of the species . No holotype was designated. De Melo et al. (2003: 431) designated several paralectotypes . A lectotype does exist at DOUFPE (M. Tavares, personal communication).

Rodrigues da Costa (1968: 335) described preserved specimens as having bright-red bands on the meri and carpi of the second to fifth ambulatory legs, the rest (of the legs?) being white (Les specimens, fixés dans l'alcool, présentent des bandes rouge vif sur le mérus et le carpus des pattes II-V, le reste blanc. ”).Traces of color were observed on the walking legs of some of the preserved specimens that were examined, particularly on the distal third of the meri of the second ambulatory legs of a female specimen.

Distribution. Brazil (Amapá to Bahia). Depth: 15–25 m ( Melo 1998).

Figures

FIGURE 5. Overall dorsal view of species of Chasmocarcinus, Amboplax n. gen. and Deltopelta n. gen. A, Amboplax peresi, Brazil: male 5.1 × 6.4 mm (ZRC 2015.217); B, Amboplax peresi, Brazil: ovigerous female 4.9 × 6.2 mm (ZRC 2015.217); C, Chasmocarcinus gemmatus n. sp., Costa Rica: male 7.7 × 11.6 mm (SIO C 1205); D, Chasmocarcinus latipes, Ecuador: male 10.5 × 14.5 mm (AMNH 1941 - 10668); E, Deltopelta obliquus, A, Bahamas: holotype male 5.2 × 5.1 mm (USNM 20509); F, Deltopelta obliquus, Belize: female 10.7 × 13.0 mm (PMNH, holotype of Hephthopelta superba); G, Deltopelta obliquus, Belize: female 10.7 × 13.0 mm (PMNH, holotype of Hephthopelta superba, after Boone 1927: fig. 5).