Camatopsis valida, Ng, Peter K. L. & Castro, Peter, 2016

Ng, Peter K. L. & Castro, Peter, 2016, Revision of the family Chasmocarcinidae Serène, 1964 (Crustacea, Brachyura, Goneplacoidea), Zootaxa 4209 (1), pp. 1-182 : 45

publication ID

https://doi.org/ 10.11646/zootaxa.4209.1.1

publication LSID

lsid:zoobank.org:pub:849BAB5C-464A-4B4A-A586-5742411EDC01

DOI

https://doi.org/10.5281/zenodo.5617109

persistent identifier

https://treatment.plazi.org/id/F16BFB33-FF8F-FFD7-FF6A-FD99FCFAF9F7

treatment provided by

Plazi

scientific name

Camatopsis valida
status

sp. nov.

Camatopsis valida View in CoL n. sp.

( Figs. 7 View FIGURE 7 G, H; 23H; 39I, J; 51E; 58E; 69G‒K; 90E)

Type material. Holotype male (3.6 × 4.9 mm) (MNHN-IU-2013-9067), Fiji, south of Viti Levu , MUSORSTOM 10, stn DW1362, 18°11.7’S, 178°35.5’E, 80‒89 m, 14.08.1998 GoogleMaps .

Paratypes. 1 female (3.5 × 4.3 mm) (MNHN-IU-2013-9467), MUSORSTOM 10, Fiji, Bligh Water , stn CP1323, 17°16.10’S, 177°45.75’E, 143‒173 m, 0 7.08.1998. GoogleMaps

Diagnosis. Carapace ( Fig. 7 View FIGURE 7 G, H) subtrapezoidal, 1.2‒1.3 wider than long; front bilobed, with shallow median cleft; anterolateral margins arcuate, minutely granular with granules higher along lateral margins, without distinct lobes or teeth. Eye peduncle ( Fig. 23 View FIGURE 23 H) filling orbit, short, slightly mobile; cornea reduced, with reduced pigmentation. Epistome ( Fig. 23 View FIGURE 23 H), semicircular median lobe with deep median fissure, semicircular lateral margins. Third maxilliped ( Fig. 69 View FIGURE 69 G) merus circular, ischium subquadrate, slightly longer than merus. Proportionally short ambulatory legs ( Fig. 7 View FIGURE 7 G, H); P5 merus 0.7 cl. Chelipeds ( Figs. 7 View FIGURE 7 G, H; 39I, J) subequal in length, heteromorphic in males. Major chela of holotype male ( Fig. 39 View FIGURE 39 I) with thick propodus, nearly triangular in dorsal view, cutting margins without distinct teeth except distal end of pollex overlapping dactylus. Minor chela of both sexes ( Fig. 39 View FIGURE 39 J) with cutting margin of pollex having few teeth. Inner margin of cheliped carpus smooth. Fused thoracic sternites 1, 2 ( Fig. 51 View FIGURE 51 E) triangular, proportionally narrow, long. Male pleon ( Figs. 51 View FIGURE 51 E; 58E) with proportionally short telson. G1 ( Fig. 69 View FIGURE 69 H‒J) conspicuously short, stout, distal segment curved outwards with short to long spinules. G2 ( Fig. 69 View FIGURE 69 K) about 3/4 G1 length, slightly curved, slender, short, straight distal segment. Female pleon with lateral margins of somites strongly convex; telson proportionally short. Sterno-pleonal cavity of female ( Fig. 90 View FIGURE 90 E) moderately deep, vulvae relatively close together.

Etymology. The name is derived from the Latin validus for “stout” alluding to the relatively stocky G1 of the species.

Remarks. In addition to the characteristic G1 and distinctive male chela, the new species can be easily distinguished from C. leptomerus and C. rubida (which are also found in Fiji) by having a different carapace form: it is proportionately broader, and the gastric and branchial regions are lower and relatively less convex ( Fig. 7 View FIGURE 7 G, H vs. Figs. 6 View FIGURE 6 ; 8A–F). The carapace characters can easily distinguish between females, even if the G1 and cheliped characters cannot be used.

Distribution. Known only from Fiji. Depth: 80‒ 173 m.

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