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Wilson, 1950

Short Description:

Euchirella grandicornis is an aetideid calanoid copepod known after female (5.97-6.80 mm in length) from the Pacific Ocean.

Taxonomic Description:

Female. Total length 5.97-6.80 mm. Cephalothorax 4.0-4.6 times longer than abdomen. Anterior part of cephalon with low, rounded crest (lateral view). Rostrum small, pointed. Th5 laterally widely rounded. Length and width of genital segment are nearly the same, segment asymmetrical, with small projection on back side in posterior half of the segment on the left (dorsal and lateral view). Posterior borders of Abd1-3 with minute spinules. A1 23-segmented, reaching the posterior margin of caudal rami. Re A2 2.6 times longer than Ri, Ri2 A2 with 6 setae on each lobe. Ri2 Md with 9 setae. Mx1 with 3 setae on posterior gnathobase surface, and with 4 and 2 (Tanaka and Omori (1969) mentioned 3 setae) setae on second and third internal lobes respectively, protopodite near the Ri base with 3 setae, Ri with 4 (Tanaka and Omori (1969) mentioned 3), Re with 11, and external lobe with 7-8 setae. Mx2 and Mxp, as P1-P4 typical of the genus. P4 coxopodite with 1 spine.

Vertical distribution:

The species was found in total hauls from 549-4600 m (Wilson, 1950; Tanaka and Omori, 1969a; Von Vaupel Klein, 1984) and in haul 153- 500 m (Markhaseva, 1996).

Geographical distribution:

The species was found in the north-eastern part of the Pacific Ocean from the region 14°N 132°W (Markhaseva, 1996) and off the area between Peru and Galapagos Isles (Wilson, 1950; Tanaka and Omori, 1969a; Von Vaupel Klein, 1984).

Type locality: between Peru and Galapagos Isles ( Wilson, 1950).

Material examined:

2 females from sample 203. See examined samples module.

Euchirella grandicornis