Paramunida scabra ( Henderson, 1885 )

Cabezas, P. E., 2010, Taxonomic revision of the genus Paramunida Baba, 1988 (Crustacea: Decapoda: Galatheidae): a morphological and molecular approach, Zootaxa 2712, pp. 1-60 : 42-43

Paramunida scabra ( Henderson, 1885)

( Figs. 15B, 18D)

Munida scabra Henderson, 1885: 409 (off the Kei Islands, 236 m); 1888: 134, pl. 15, figs 4, 4a, 4b (off Little Kei Islands, 256 m). — Yokoya 1933: 63 (S of Inuboe-zaki, Sagami Bay, E of Miyazaki, W of Muroto-zaki, Bungo Strait, vicinity of Goto I., E of Chejudo, S of Tsushima, 106–393 m). — Yanagita 1943: 30, figs 9, 10 (off Miya, Aichi Prefecture, 360 m). — Miyake & Baba 1967: 242, fig. 13 (East China Sea, 100–158 m). — Baba 1969: 49 (East China Sea, 310 m). — Kim 1973: 178 (no record). — Miyake 1982: 149, pl. 50, fig. 2 (E of Koshiki-jima, Kagoshima, 300–350 m). — Baba in Baba et al. 1986: 175, 292, fig. 125 (Okinawa Trough and Tosa Bay, 150–550 m).

Paramunida scabra Baba 1988: 180 (off NE Borneo, Balabac Strait off N Borneo, Sulu Archipelago, off N Mindanao, off Pacific coast of S Luzon, South China Sea off SW Luzon, off Hong Kong and off SW Formosa, 70–1630 m). — Baba 1990: fig. 15a (reexamination of type material). — Macpherson 1993: 462, fig. 8 (in part, Philippines and Indonesia, 143–1075 m). — Baba 1994: 19 (off Central Queensland, 497–503 m). — Komai 2000: 360 (list). — Davie 2002: 66 (no record). — Baba 2005: 199, 303 (key, synonymies, Japan and Kei Islands, 180–325 m). — Baba et al. 2008: 174 (list of occurrences). — Baba et al. 2009: 281, figs. 257–258 ( Taiwan, 520–640 m).

Not Paramunida scabra Wu et al. 1998: 145 , figs 41, 42G (Taiwan) — Macpherson 1993: 462 (in part) (= P. tricarinata ( Alcock, 1894)) .

Dubious identity:

Munida scabra var. longipes Borradaile 1900: 422 (type locality: Talili Bay , New Britain Talili Bay, New Britain; 3 syntypes not located).

Paramunida scabra Tirmizi & Javed 1993: 131 , figs 58, 59 (off Tanzania and off Mozambique, 100–347 m).

Material examined. Taiwan. Dasi fishing port, Yilan County, 03 December 1984: 1 ov. F 10.8 mm. — 09 November 1995, 1 M 8.0 mm. — Stn CP 120, 24º51.79’N, 122º02.54’E, 31 July 2001, 520– 640 m: 1 M 5.2 mm ( NTOU) .

Philippines. PANGLAO. Stn CP 2343, 09º26.6’N, 123º51.3’E, 23 May 2005, 309– 356 m: 7 M 10.4–12.2 mm, 2 ov. F 11.2–11.8 mm .

Indonesia. Kei Islands . KARUBAR. Stn DW 49, 08°00'S, 132°59'E, 29 October 1991, 206– 210 m: 1 M 11.9 mm. — Stn CP 82, 09°32'S, 131°02'E, 04 November 1991, 215– 219 m: 2 M 9.8–10.6 mm, 1 ov. F 12.2 mm, 3 F 10.9–11.7 mm. — Stn 86, 09°26'S, 131°13'E, 04 November 1991, 223– 225 m: 3 M 8.5–10.4 mm, 1 ov. F 11.0 mm, 2 F 9.7–10.0 mm (MNHN-Ga3454) .

Diagnosis. Rostrum spiniform, larger than supraocular spines, with thin dorsal carina; margin between rostral and supraocular spines straight or slightly concave. Spinules on gastric and hepatic regions forming groups arising from scale-like striae and with few short uniramous setae. Mesogastric region with well developed median spine. Cardiac region with 3 median well-developed spines in midline. Few and short setae along anterior branch of cervical groove. Sternal plastron with numerous striae on sternites 4–7. Lateral margin of antennular segment 1 with distal slender portion about half as long as proximal inflated portion. Antennal peduncle with anterior prolongation of segment 1 spiniform; segment 2 nearly twice longer than broad, distomesial spine spiniform, exceeding segment 3, distolateral spine not reaching end of segment 3; segment 3 about 1.5 times longer than broad, base of P1 carpus without bundle of setae. P2 propodus about 8 times as long as wide, and 1.2–1.4 times dactylus length.

Remarks. Paramunida scabra is closely related to P. cristata from Fiji, Vanuatu, and Taiwan. The two species differ in several constant characters. The longitudinal carina on the rostral spine is clearly thicker in P. cristata than in P. scabra . Furthermore, the distomesial spine of the antennal segment 2 slightly overreaches the antennal peduncle in P. cristata , whereas this spine only exceeds the segment 3 in P. scabra . The genetic divergences between the two species were 4.45% (16S rRNA) and 13.33% (ND1).

Paramunida scabra also resembles P. mozambica n. sp. from Mozambique, from which it is distinguished by:

— The mesogastric region has 1 (rarely 2) spine in P. scabra , instead of a row of 3 or 4 distinct spines in P. mozambica .

— The sternal plastron has numerous striae on the sternites 4–7 in P. scabra , rather than a few striae on each side of the sternites 5–7.

The genetic divergences between P. scabra and P. mozambica were 5.49% (16S rRNA) and 9.05% (ND1).

Paramunida scabra also resembles P. crinita n. sp. from the Philippines. The two species can be differentiated by the presence of numerous tufts of long and dense setae along the anterior branch of the cervical groove in P. crinita , whereas these tufts are absent in P. scabra . The genetic divergences between P. crinita and P. scabra were 7.72% (16S rRNA) and 10.23% (ND1).

Finally, P. scabra is also related to P. evexa from Indonesia. These species can be easily distinguished by the distomesial spine of the antennal segment 2, which is spiniform in P. scabra and blunty produced in P.

evexa (see also Macpherson 1993). The genetic divergences between P. evexa and P. scabra were 3.21% (16S

rRNA) and 8.26% (ND1).

Distribution. Hong Kong, East and South China Sea (Dongsha), Indonesia, Philippines, Taiwan, Japan, and Australia (off Central Queensland), between 70 and 1630 m. The occurrences along the Eastern Africa (off Tanzania and off Mozambique) are questionable and therefore require confirmation.