Haptocallisoma spinipoda ( Hendrycks & Conlan, 2003 ) Hendrycks & Conlan, 2003

Horton, Tammy & Thurston, Michael H., 2015, A revision of the genus Paracallisoma Chevreux, 1903 (Crustacea: Amphipoda: Scopelocheiridae: Paracallisominae) with a redescription of the type species of the genus Paracallisoma and the description of two new genera and two new species from the Atlantic Ocean, Zootaxa 3995 (1), pp. 91-132 : 121

Haptocallisoma spinipoda ( Hendrycks & Conlan, 2003) comb. nov.

Paracallisoma spinipoda Hendrycks & Conlan 2003: 2322 , figs 8–9.

Type material. Holotype —adult male, 10 mm, (appendages on one slide) ( CMNC 2002–0029), Station 216, cup #1, North-east Pacific off Point Conception, California, United States 34°47.94’N, 123°03.80’W, 3450 m, 24/06/ 1992.

Paratype. juvenile, sex unknown, 5.0 mm, CMNC 2002–0030, Station 621, cup #1, 34°50.88’N, 122°58.68’W, 4000 m, date unknown.

Remarks. Haptocallisoma spinipoda belongs in the new genus Haptocallisoma on account of the broadly expanded pereopod 5 basis and prehensile pereopods 3–7. The species can be distinguished from H. abyssi by differences in the shape of epimeron 3 (produced, with a concave posterior margin versus not produced and with a convex posterior margin in H. abyssi ), differences in the shape of the telson (in H. spinipoda , the lobes are slightly divergent distally, whereas they are closely appressed in H. abyssi ), and minor differences in setation of the mouthparts. The subrectangular pereopod 5 basis in H. lemarete sp. nov. differs markedly from the broadly rounded structure found in H. spinipoda . H. spinipoda is the first species in this genus to be described from the Pacific Ocean.

Depth range. 3450–4000 m.

Distribution. North-east Pacific off Point Conception, California, United States 34°47.94’N, 123°03.80’W.