Munidopsis hamata Faxon, 1893

Guzman, Guillermo L. & Sellanes, Javier, 2015, A review of the Munidopsidae Ortmann, 1898 (Decapoda, Galatheoidea) in Chilean waters, including new records for the Southeastern Pacific, Zootaxa 4021 (2), pp. 282-306 : 292

Munidopsis hamata Faxon, 1893

( Fig. 6 )

Restricted synonymy:

Munidopsis hamata Faxon, 1893: 187 .— Luke, 1977: 28 (list).— Wicksten, 1989: 315 (list).— Baba, 2005, 159–152, 289, fig. 66.

Not Munidopsis hamata, Retamal 1981: 23 . The material deposited MZUC-CCC 31734, belongs to M. barrerai (see below)

Type locality. Gulf of Panama (07°21.00’N, 79°35.007’W, 935 m).

Distributional range. Baja California, Mexico, to the Gulf of Panama ( Wicksten 1989) and Chile.

Bathymetric range. 390–1337 m

New record. MUAP (CD)-0308, 2 specimens, stn 8 “ PNUD /Chi/87” (18°24’S, 70°45’W), 390 m. One of the two specimens in MZUC-CCC 31734 belongs to M. hamata , collected in Iquique, with no other data available.

Description. Rostrum long, about half carapace length, slightly curved upward, armed with row of minute lateral and submarginal spines. Carapace almost rectangular, densely covered by minute spines; antennal spine absent; anterolateral spines short, not reaching anterior margin of carapace; cervical groove strong depressed; gastric and cardiac area of similar height, gastric with a longitudinal row of spines; cardiac region with strong medial spine projecting anteriorly; posterior margin with strong medial spine flanked by row of minor spines ( Fig. 6 a). Second to third abdominal segments with medial spine-like tubercle flanked by minor spines ( Fig. 6 b). Telson with nine plates ( Fig. 6 c). Chelipeds equals in size and shape, palm almost twice length of fixed finger, armed with sparse spines and tubercles ( Fig. 6 d). Carpus and merus armed with spines on both dorsal and ventral margins ( Fig. 6 e, f). Pereiopods armed with sparse spines and tubercles ( Fig. 6 g); dactyl armed only on ventral margin, with 8 or 9 spines ( Fig. 6 h).

Remarks. The diagnostic characters of the analyzed specimens are well matched with those of the Baba (2005) and the original description in Faxon (1893). Almost no morphological variations were observed in the three specimens analyzed.

The record cited by Retamal (1981, 2000) as M. hamata , collected from Rada Chigualoco, 31°44'S, 71°41'W, Chile, is erroneous. The material is deposited in the Museum of Zoology, Universidad de Concepción (MZUC- CCC 31604), and belongs to M. barrerai .

Despite Retamal’s record, this is the first valid record of the species for Chile.

Figures

FIGURE 6. Munidopsis hamata Faxon, 1893 MUAP (CD) - 0308: a, lateral view of carapace; b, lateral view of first to fifth abdominal somites; c, telson, dorsal view; d, right cheliped; e, merus of cheliped; f, carpus of cheliped; g, third right pereiopod; h, detail of dactyl of third pereiopod. Scale = 1 mm.