Raoulia calva, 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 : 35

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.4909778
persistent identifier	https://treatment.plazi.org/id/03E287AE-5467-E219-8A9D-45AEFC8E0A3F
treatment provided by	Felipe
scientific name	Raoulia calva
status	sp. nov.

Treatment

Raoulia calva sp. nov.

( Figs. 5G View FIGURE 5 , 22 View FIGURE 22 , 23 View FIGURE 23 , 41B View FIGURE 41 )

Material examined. Holotype: male (6.6 × 5.2 mm) ( ZRC 2013.1721 View Materials ), station BMOO-08601, BIZ-138, Moorea, Society Is., Gump Reef, French Polynesia, 17.4901°S 149.8263°W, silty fringing reef wall, under rubble and rocks, 10–20 m, brushing, coll. S. McPherson, 9 November 2009 GoogleMaps . Paratype: French Polynesia: 1 female (6.5 × 5.1 mm) ( ZRC 2013.1722 View Materials ), station BMOO-07884, BIZ-089, in front of Gump Station , near dock, Moorea, Society Is., 17.4908°S 149.8261°W, silty fringing reef wall, under silty rocks, 3–15 m, coll. S. McPherson & G. Paulay, 1 November 2009 GoogleMaps .

Diagnosis. Carapace width 1.3 times length ( Fig. 22A View FIGURE 22 ). Junction between frontal, supraorbital margins appears almost right-angled in frontal view ( Fig. 22C View FIGURE 22 ). Third maxilliped merus short, less than half length of ischium; ischium subquadrate, 1.3 as long as broad ( Figs. 5G View FIGURE 5 , 23B View FIGURE 23 ). Ambulatory legs short; merus of last ambulatory legs about 2.8 times as long as broad ( Fig. 22A View FIGURE 22 ). G1 with distal half distinctly curving laterally outwards in situ, distal part dilated ( Fig. 23C–F View FIGURE 23 ).

Colour. In life, the carapaces of the specimens are dirty white, with the pereopods light brown, and the setae reddish-brown ( Fig. 41B View FIGURE 41 ).

Etymology. From the Latin calvus for “smooth” and “bald”, alluding to the smooth carapace and chelae, without setae and tubercles

Remarks. Raoulia calva sp. nov. shares with R. piroculata a relatively elongated ischium of the third maxilliped (length to width ratio about 1.3), but their carapaces are different, with that of R. calva sp. nov. proportionately less broad with the front margin more or less straight ( Fig. 22C View FIGURE 22 ) while in R. piroculata , the front margin is widely triangular ( Fig. 17C View FIGURE 17 ). Most importantly, while the G1 of R. calva sp. nov. is curved like R. limosa and R. galea sp. nov., its distal part is distinctly dilated ( Fig. 23C–F View FIGURE 23 ) whereas it is tapering in the other taxa ( Figs. 16D–G View FIGURE 16 , 19H–K View FIGURE 19 ).