Munidopsis parfaiti ( Filhol, 1885 )

Macpherson, Enrique & Segonzac, Michel, 2005, Species of the genus Munidopsis (Crustacea, Decapoda, Galatheidae) from the deep Atlantic Ocean, including cold-seep and hydrothermal vent areas, Zootaxa 1095 (1), pp. 1-60 : 37-41

Munidopsis parfaiti ( Filhol, 1885) ( Figs 10 , 11 )

Elasmonotus Parfaiti Filhol, 1885 : pl. 7.— Perrier, 1886: 295, 324.

Orophorhynchus Parfaiti. —A. Milne­Edwards & Bouvier, 1894: 287, fig. 4, 13, 34; 1899: 85; 1900: 336, pl. 3: fig. 1, pl. 31: figs 11–13.— Nobre, 1931: 188 (cite); 1936: 117 (cite).

Munidopsis parfaiti .— Benedict, 1902: 324 (list).— Doflein & Balss, 1913: 177 (list).— Gordon, 1955: 244 (list).—Zariquiey­Alvarez, 1968: 271.— Türkay, 1975: 67.—de Saint Laurent, 1985: 475.—Udekem d’Acoz, 1999: 168.

Material examined. NE Atlantic, NORATLANTE, Stn 115­B17, 43º13’N, 05º30’W, 4700 m, 29.10.1969: 1 female 24.6 mm.—Stn 116­B18, 46°40.2’N, 10°05.8’W, 4690 m, 30.10.1969: 1 female 15.8 mm. Bay of Biscay , BIACORES, Stn 249, 45°50’N, 17°32.5’W, 4650 m, 16.11.1971: 1 female 28.2 mm. Bay of Biscay , BIOGAS 3, Stn CV28 , 47º25’N, 09º36’W, 4023 m, 28.08.1973: 1 male 29.7 mm. Bay of Biscay , BIOGAS 5, Stn CP 04, 47º35’N, 09º31’W, 4200 m, 18.06.1974: 1 male 31.9 mm. Bay of Biscay, BIOGAS 6, Stn CP 14, 47º32’N, 09º35.9’W, 4237 m, 25.10.1974: 2 males 28.3–32.5 mm.— Stn CP 19, 44º25’N, 04º51’W, 4434 m, 28.10.1974: 1 male 22.3 mm.— Stn CP 20, 44º23’N, 04º51’W, 4459 m, 29.10.1974: 2 males 22.5–30.1 mm, 1 female 30.8 mm, 1 juv. 8.0 mm. Off Ireland, INCAL, Stn CP 07, 55°03.4’N, 12°46.2’W, 2895 m, 20.07.1976: 1 male 29.2 mm, 1 female 33.1 mm. Off South Africa / Namibia, WALVIS, Stn CP 05, 33°23'S, 02°36'E, 4500 m, 30.12.1978: 1 male 29.6 mm, 1 female 29.3 mm.— Stn CP 06, 33°22.5’S, 02°35.9’E, 4550 m, 30.12.1978: 1 male (broken), 2 females 13.1–31.0 mm.— Stn CP 08, 27°00’S, 01°07’E, 5210 m, 05.01.1979: 1 ovig. female 30.4 mm, 1 female 28.7 mm. NE Atlantic, ABYPLAINE, Stn CP 03, 36°49.4’N, 19°09.8’W, 4900 m, 20.05.1981: 1 male 32.2 mm.— Stn CP 14, 39°59.2'N, 15°02.1'W, 5330 m, 08.06.1981: 1 male 23.1 mm, 1 female 25.9 mm. — Stn CP 22, 44°41.8’W, 18°01.8’W, 4990 m, 21.07.1981: 2 males 30.0– 31.2 mm. NE Atlantic, BENGAL 2, Stn 13078/6, 48º44.55’N, 16º32.77’W, 4838 m, 30.03.1997: 1 male 31.9 mm. NE Atlantic, BENGAL 3, Stn 13200/84, 48º47.95’N, 16º33.28’W, 4842 m, 23.07.1997: 2 males 29.7–32.2 mm.— Stn 13200/93, 48º50.55’N, 16º25.30’W, 4846 m, 25.07.1997: 1 female 34.1 mm.— Stn 13200/94, 48º50.99’N, 16º26.03’W, 4847 m, 25.07.1997: 2 males 32.7–34.6 mm. NE Atlantic, BENGAL 5, Stn 13368/48, 48°49.6’N, 16°30.1’W, 4843 m, 17.03.1998: 3 males, 27.4–31.9 mm, 6 females 18.8–32.0 mm.— Stn 13368/52, 48º48.30’N, 16º25.97’W, 4839 m, 19.03.1998: 1 male 29.1 mm, 1 female 33.9 mm. NE Atlantic, BENGAL 6, 13627/11, 48º47.82’N, 16º40.37’W, 4847 m, 01.10.1998: 1 male 32.1 mm, 1 female 34.0 mm.— Stn 13627/24, 48º50.47’N, 16º44.37’W, 4839 m, 05.10.1998: 1 male 34.7 mm .

Diagnosis. Carapace, abdomen, chelipeds and walking legs spineless, covered with tubercles. Carapace nearly devoid of setae, areas well delineated and convex. Lateral margins convex on hepatic regions, subparallel on branchial regions. Rostrum very broadly triangular, about 1/3 as long as remaining carapace, weakly carinated dorsally, carina not continued onto anterior half gastric region. Abdominal segments 2–4 each with blunt, low median process; posterolateral lobes of segment 6 distinct, and clearly overreaching nearly straight transverse posteromedian margin. Telson divided into 8 plates, posterior plates combined more than twice as broad as long. Ocular peduncles not movable, distally ending in blunt process; cornea lateral. Chelipeds slightly longer than carapace in both sexes, few small spines on mesial and distal borders of merus and carpus; fingers as long as palm, distally hoof­shaped, fixed finger sometimes with low denticulate carina on distolateral margin, movable finger slightly shorter than fixed finger. Walking legs subcylindrical, relatively stout; each dactylus nearly 3/4 as long as propodus, distally

curving, ending in strong spine, flexor margin with 8–10 teeth (each with accompanying seta­like spine) diminishing toward base of article, ultimate tooth slightly remote from end of dactylus and much closer to end than to penultimate tooth; propodi and often carpi with plumose setae on dorsal face. First walking legs overreaching distal end of chelipeds. Epipods on chelipeds, absent on walking legs.

Distribution. The holotype of M. parfaiti was collected from the Azores Islands (one male, LC= 25 mm, Talisman expedition, Stn 136, 44º20’N, 19º31’W, 4255 m, 26.08.1883) and is apparently lost. The species was later collected between the Azores and the coast of Portugal at 4360 m (A. Milne­Edwards & Bouvier 1894, 1899, 1900), Bay of Biscay, 3992–4510 m (de Saint­Laurent 1985), Iberian coast, 5260­5275 m ( Türkay 1975). The present material was collected between the northeast Atlantic (off Ireland, 55º03’N) and southeast Atlantic (off South Africa, 33º23’S), at depths between 2895 and 5330 m. The species has not been found in hydrothermal vents or cold seep areas ( Table 2).

Figures

FIGURE 10. Munidopsis parfaiti (Filhol, 1885), female (15.8 mm), NE Atlantic, NORATLANTE, Stn 116­ B18. A, carapace and abdomen, lateral. B, same, dorsal. Scale: 4 mm.

FIGURE 11. Munidopsis parfaiti (Filhol, 1885), male (31.9 mm), NE Atlantic, BENGAL 2, Stn 13078/6. A, right antennule, antenna and ocular peduncle, ventral. B, anterior part of sternal plastron. C, endopod of right third maxilliped, lateral. D, right cheliped, lateral. E, right second pereiopod, lateral. Scale: A–C = 2 mm, D–E = 4 mm.