Engystenopus palmipes Alcock & Anderson, 1894

Goy, Joseph W., 2010, A review of the genus Engystenopus (Crustacea: Decapoda: Stenopodidea) Juxtastenopus, gen. nov., a new combination for E. spinulatus Holthuis, 1946, and transfer of E. palmipes Alcock & Anderson, 1894 to the family Spongicolidae Schram, 1986 *, Zootaxa 2372, pp. 263-277 : 274-276

Engystenopus palmipes Alcock & Anderson, 1894

( Fig.6)

Engystenopus palmipes Alcock & Anderson, 1894: 149 , pl.9 fig. 1. — Alcock & Anderson 1896: pl.26 fig.3. — Alcock 1899: 33. — Alcock & McArdle 1901: pl.50, fig.5. — Alcock 1901: 144, pl, 2. — A. Milne-Edwards & Bouvier 1909: 264. — Holthuis 1946: 45; 1955: 144, fig. 103. — Burukovsky 1974: 92, fig.91. — de Saint-Laurent & Cleva 1981: 161, figs. 4, 5, 6. — Burukovsky 1983: 131, fig.17; 1991: 41. — Holthuis 1993: 313, fig.308.

Engystenopus cf. palmipes Poore , et al. 2008: 92.

Material examined. (i) 1 male, 1 female, cls 7.2, 7.4, MUSORSTOM I, Sta. 3, Philippines, 14 o 01.7’ N 120 o 16.0’E, 194– 180 m, “ Vauban ”, 19. III.1976, beam trawl, MNHN Na 2908. (ii) 1male, cl 9.2, MUSORSTOM I, Sta. 25, Philippines, 14 o 02.7’N, 120 o 20.3’E, 200– 191 m, “ Vauban ”, 22.III.1976, beam trawl, MNHN Na 2910. (iii) 2 males, 1 female, cls 8.6, 8.7, 9.0, MUSORSTOM I, Sta. 30, Philippines, 14 o 01.3’N, 120 o 18.7’E, 186– 177 m, “ Vauban ”, 22.III.1976, beam trawl, MNHN Na 2911. (iv) 1 male, 1 ov. female, cls 10.2, 9.1, MUSORSTOM I, Sta. 31, Philippines, 14 o 00.0’N, 120 o 16.0’E, 187– 175 m, “ Vauban ”, 22.III.1976, beam trawl, MNHN Na 2912. (v) 1 female, cl 8.0, MUSORSTOM I, Sta. 32, Philippines, 14 o 02.2’N. 120 o 17.7’E, 193– 183 m, “ Vauban ”, 23. III. 1976, beam trawl, MNHN Na 2913. (vi) 1 male, cl 9.5, MUSORSTOM I, Sta. 50, Philippines, 13 o 49.2’N 120 o 01.8’E, 415–560 m, “ Vauban ”, 25. III. 1976, beam trawl, MNHN Na 2914. (vii) 1 ov. female, cl 10.0, MUSORSTOM I, Sta. 64, Philippines, 14 o 00.5’N, 120 o 16.3’E, 195– 194 m, “ Vauban ”, 27.III.1976, beam trawl, MNHN Na 2915. (viii) 1 male, 1 ov. female, cls 9.2, 6.6, MUSORSTOM I, Sta. 71, Philippines, 14 o 09.3’N 120 o 26.2’E, 174–204m, “ Vauban ”, 28. III. 1976, beam trawl, MNHN Na 2916. (ix) 1male, cl 9.2, MUSORSTOM II, Sta. 13, Philippines, 14 o 00.5’N 120 o 20.7’E, 200– 193m, “ Coriolis ”, 21. XI. 1980, beam trawl, MNHN Na 3896. (x) 1male, cl 9.2, MUSORSTOM II, Sta. 75, Philippines, 13 o 50.5’N 120 o 30.3’E, 300–330m, “ Coriolis ”, 1. XII. 1980, beam trawl, MNHN Na 3897. (xi) 1male, cl 9.0, MUSORSTOM III, Sta. CP 103, Philippines, 14 o 00’N 120 o 18’E, 193–200m, “ Coriolis ”, 1. VI . 1985, beam trawl, MNHN. (xii) 1female, cl 8.7, KARUBAR, Sta. CP 59, Indonesia, Ile Tanimbar, 08 o 20’S, 132 o 11’E, 405– 399 m, “ Baruna Jaya 1”, 31.X.1991, beam trawl, MNHN .

(xiii) 1 male, cl 12.2, Madagascar, 22 o 18’S, 43 o 04.7’E, 400 m, Chalutage 94, 27.XI.1973, leg. A. Crosnier, MNHN Na 3516, (xiv) 1 ov. female, cl 12.4, EAMBRO, St. Cr 330, Indian Ocean , 7 o 15’S, 39 o 44’E to 7 o 12’S 39 0 43.3’E, 274 m, FRV “Manihine”, 15.IX.1971, leg, P. Sandhu, NTM-CR00330. (xv) 2 males, cls 7.5, 9.6, Australia, off Cairns, N. E. Queensland, 17 o 06’S, 150 o 52’E, 606–610 m, R / V “Soela” Cruise 6, Station 81, 12. VI .1985 leg. P. Davie, QM-W16088. (xvi) 1 male, cl 9.8, MUSORSTOM I, Sta. 10, Philippines, 13 o 59’48”N, 120 o 18’12”E, 187–205 m, “Vauban”, 19.III.1976, beam trawl, USNM 181655 . (xvii) third pereiopod only, Western Australia, off Ningaloo South , 22 o 04’S, 400 m, leg. G. Poore, NMV 5545 .

Diagnosis. As for the genus.

Supplemental Description. The species was adequately described and illustrated by de Saint-Laurent & Cleva (1981), so only some comments on variation within the species is provided here. The entire body ( Fig. 6A) is somewhat depressed, very smooth and polished with only large supraorbital spines and a few pterygostomial spinules on the carapace. The rostrum is laterally compressed with 7–12 dorsal, 1 or 2 ventral, and 1–3 lateral teeth. Pleon smooth, rounded with posterior borders of pleura finely toothed in males, but only on the fourth and fifth pleura of females. Antennal scale a little more than two times as long as wide, armed with 3–6 teeth distally on outer margin. Third pereiopod ( Fig. 6B) very distinctive with merus and carpus long, slender bearing numerous teeth on outer margins, and carpus inflated distally. Dactylus serrated on dorsal margin with scattered spinules on face; palm compressed, dorsal margin serrated, ventral margin with serration extending onto fixed finger, few spinules on dorsal face, distinct row of spinules below cutting edge of fixed finger. Dactylar cutting edge with large triangular proximal tooth merging into chitinous ridge; propodal cutting edge with two proximal opposing subrectangular teeth merging distally into scalloped chitinous ridge. Fourth and fifth pereiopods with 6 carpal and 5 propodal subsegments, sometimes indistinct, propodi with 0–6 ventral movable spines. Outer margin of uropodal exopodite with 4–8 teeth, endopodite margin smooth.

Measurements. (mm) Postorbital carapace length: females 6.6–12.4, males 7.0–12.2; carapace and rostrum length: females 7.8–15.3, males 9.2–15.8; tl: females 21.2–38.4, males 21.0–37.5; length of third pereiopod, 32.7–58.0. Ovigerous females range in size from 6.6–12.4 postorbital carapace length, 21.2–38.4 total length, and carried 34– 156 eggs. Eggs at blatula stage with undifferentiated yolk cells measured 0.42 × 0.45 mm in size.

Colour pattern. Body salmon-red, flecked slightly with white; third pereiopods with white nodes and salmon-pink internodes ( Alcock & Anderson 1894).

Distribution. Indian Ocean, Philippines, Madagascar, Indonesia, and NW and NE Australia; 174– 640 m. The holotype was collected in the Bay of Bengal but the species was not found again until 1976 with the addition of 15 specimens from the Philippines (de Saint Laurent & Cleva 1981). The present study adds another 3 specimens from the Philippines, 1 from Madagascar, 1 from Tanimbar Island, Indonesia, and 2 from off Queensland, Australia. The distinctive third cheliped was recorded off Western Australia ( Poore et al. 2008) and Burukovsky (1991) reported a female specimen from the southwest Indian Ocean, near Madagascar.