Caecopilumnus loculatus, Ng & Rahayu, 2014

Ng, Peter K. L. & Rahayu, Dwi Listyo, 2014, Revision of the family Acidopsidae Števčić, 2005, and the systematic position of Typhlocarcinodes Alcock, 1900, Caecopilumnus Borradaile, 1902, and Raoulia Ng, 1987, with descriptions of two new genera and five new species (Crustacea: Brachyura: Goneplacoidea), Zootaxa 3773 (1), pp. 1-63 : 47-50

publication ID	https://doi.org/ 10.11646/zootaxa.3773.1.1
publication LSID	lsid:zoobank.org:pub:19F28753-B2D0-4D1F-9D47-88886F7333FD
DOI	https://doi.org/10.5281/zenodo.4909784
persistent identifier	https://treatment.plazi.org/id/03E287AE-546B-E20A-8A9D-4145FC810D06
treatment provided by	Felipe
scientific name	Caecopilumnus loculatus
status	sp. nov.

Treatment

Caecopilumnus loculatus sp. nov.

( Figs. 5J View FIGURE 5 , 32 View FIGURE 32 , 33 View FIGURE 33 , 41D–F View FIGURE 41 )

Material examined. Holotype: male (8.0 × 6.7 mm) ( ZRC 2013.1723 View Materials ), station BMOO-15292, BIZ-589, intertidal, 0.5 m, west of entrance to Opunohu Bay , small beach with rocks, corals, rubble, exposed reef, 17.4968S 149.86306W, Moorea, Society Is., French Polynesia, coll. A. Anker & D. Ueno, 16 November 2010 GoogleMaps . Paratypes: French Polynesia: 1 female (9.4 × 7.7 mm) ( ZRC 2013.1724 View Materials ), station BMOO-15753, BIZ-626, reef flat with rocks and rubble, 0.5 m, south of Nihimaru , 17.4968S 149.905W, Moorea, Society Is., coll. A. Anker, 21 November 2010 GoogleMaps ; 1 female (15.7 × 13.6 mm) ( ZRC 2013.1725 View Materials ), station BMOO-16119, BIZ-677, sand flat, deep under rocks, 1 m, Motu I. channel, 17.4892S 149.91314W, Moorea, Society Is., coll. A. Anker, 2 December 2010 GoogleMaps .

Diagnosis. Carapace subquadrate; dorsal surface finely granular; regions separated by shallow grooves ( Fig. 32A View FIGURE 32 ). Anterolateral margin arcuate, hirsute, with 2 or 3 low, broad granuliform lobes ( Fig. 32A View FIGURE 32 ). Merus of third maxilliped rounded ( Figs. 5J View FIGURE 5 , 33B View FIGURE 33 ). Merus of last ambulatory leg 2.0 times as long as broad; propodus as long as broad ( Fig. 32A View FIGURE 32 ). Male abdomen relatively wide; a1 with lateral margins gently convex; a3–5 proportionately wide, a6 distinctly wider than long ( Fig. 33A View FIGURE 33 ). Gl stout, sinuous, proximally dilated, distal half slightly more slender than proximal, tip narrow, lateral and mesial margin with row of spinules, mesial margin with several spinules medially ( Fig. 33C–F View FIGURE 33 ). G2 slightly longer than G1, distal segment half length of basal segment ( Fig. 33G View FIGURE 33 ).

Colour. In life, the body and pereopods are dirty white with pale brown patches on the dorsal surface of the carapace. The setae are brown ( Fig. 41D–F View FIGURE 41 ).

Etymology. From the Latin loculatus for “box,” alluding to the quadrate box-like carapace characteristic of the species.

Remarks. Caecopilumnus loculatus sp. nov. most closely resembles C. crassipes in the form of the carapace (with low granulation and shallow grooves) and the shorter propodus of the last ambulatory leg. It differs from C. crassipes in its more quadrate carapace ( Fig. 32A View FIGURE 32 ; Figs. 28A View FIGURE 28 , 29A View FIGURE 29 , 30 View FIGURE 30 for C. crassipes ), proportionately longer ambulatory meri (ratio for last leg 2.0, Fig. 32A View FIGURE 32 ; 1.5 View FIGURE 1 for C. crassipes , Fig. 28A View FIGURE 28 ), proportionately wider male abdomen ( Fig. 33A View FIGURE 33 ; Fig. 31A View FIGURE 31 for C. crassipes ), and the more sinuous G1 ( Fig. 33C, D View FIGURE 33 ; Fig. 31D View FIGURE 31 for C. crassipes ). It can be separated from C. hirsutus by its shorter last ambulatory propodus ( Fig. 32A View FIGURE 32 ; 27B, C View FIGURE 27 for C. hirsutus ), proportionately wider a6 ( Fig. 33A View FIGURE 33 ; 27A View FIGURE 27 for C. hirsutus ), and the more sinuous G1 ( Fig. 33C, D View FIGURE 33 ; Figs. 25C View FIGURE 25 , 26C View FIGURE 26 for C. hirsutus ).