Munidopsis bairdii ( Smith, 1884 )

Wang, Chunsheng, 2017, Three squat lobsters (Crustacea: Decapoda: Anomura) from tropical West Pacific seamounts, with description of a new species of Uroptychus Henderson, 1888, Zootaxa 4311 (3), pp. 389-398 : 393-394

Munidopsis bairdii ( Smith, 1884)

( Figs. 3 A, 4B, 5A)

Galacantha bairdii Smith, 1884: 356 (type locality: offShore of DelaWare Bay , WeStern Atlantic; 2738 m).

Munidopsis bairdii .— Faxon, 1895: 83.— Benedict, 1902: 317, fig. 47.— Khodkina, 1975: 262, fig. 2-2.— Ambler, 1980: 18.— Wenner, 1982: 367.— Baba, 2005: 285 (liSt of SynonymieS and referenceS).— MacpherSon & Segonzac, 2005: 17 , fig. 4.— MacpherSon, 2007: 43.— OSaWa & Takeda, 2007: 139, fig. 4A, B.— Baba et al., 2008: 133 (compilation).

Material examined. St. DV 78, slope of the Pallada Guyot , East Mariana Basin, 155.199°E, 15.9076°N, depth 2280 m, associated with unknown coral, coll. Dr. Bo Lu in Jiaolong manned submersible, R/ V Xiangyanghong 9, 21 July 2014, 1 male (PCL 8.4 mm).

Coloration. Entirely white.

Habitat. In present study, commensal with unknown coral; Guyot slope.

Distribution. Western Pacific: Okinawa Through, East Mariana Basin; East Pacific: Gulf of Panama, off Mazatlan and off San Quintin, Baja California, off Ecuador, off Oregon; Atlantic Ocean: offshore of Delaware Bay, off New England and Middle Atlantic Bight, Bay of Biscay, off Ireland; Indian Ocean: west of Sri Lanka; depths of 1900–4260 m.

Remarks. The present specimen has the mesial eyespines directed forward and weakly anterolaterally, corresponding well with the descriptions and figures from Macpherson & Segonzac (2005) and Osawa & Takeda (2007). The submedian spines on the carapace are arranged 2, 1, 2, 1, 2, 1 on the epigastric, protogastric, mesogastric, anterior cardiac, posterior cardiac, and intestinal regions, respectiVely. The posterior carapace marginal ridge is armed with 5 spines. The present specimen differs slightly from preVious reports in lacking a distodorsal spine on the article 3 of antennal peduncle, which maybe an intraspecific character.

The present species was obserVed for the first time associated with a cnidarian species ( Fig. 5A ).

Figures

FIGURE 3. Munidopsis bairdii (Smith, 1884), male, PCL 8.4 mm (A); Munidopsis kensmithi JoneS & MacpherSon, 2007, male, PCL 8.5 mm (B, C). A, B, carapace, dorSal vieW; C, dactyluS of left pereopod 3, lateral vieW. ScaleS equal 1.0 mm.

FIGURE 5. A, in Situ photo of Munidopsis bairdii (Smith, 1884) aSSociated With unknoWn coral, Slope of Pallada Guyot, depth 2280 m; B, in Situ photo of poSSible Munidopsis kensmithi JoneS & MacpherSon, 2007 beSide artificial rubbiSh, polymetallic noduleS Seabed, baSe of Lamont Guyot, depth 4833 m.