Waldeckia orchospina ( Hirayama, 1986 ) Hirayama, 1986

Lowry, J. K. & Kilgallen, N. M., 2014, A revision of the lysianassid genus Waldeckia with the description of four new species (Crustacea, Amphipoda, Lysianassidae, Waldeckiinae subfam. nov.), Zootaxa 3784 (4), pp. 301-345 : 333

Waldeckia orchospina ( Hirayama, 1986) comb. nov.

( Fig. 25 d)

Orchomene orchospina Hirayama, 1986: 16 , figs 207–208.― Barnard & Karaman, 1991: 509.

Types. Holotype,? female, 3.0 mm, AMBL-Amph. 89.

Type locality. Tomioka Bay, Amakusa Island, Kyushu, Japan.

Diagnostic description. Head lateral cephalic lobe large, broadly rounded. Antenna 1 peduncular article 1 without anterodistal projection. Labrum, epistome and upper lip not known. Mandible palp article 2 anterodistal margin asetose; article 3 with apical setae. Labium with apical stylets on each lobe. Gnathopod 1 parachelate; basis anterior margin with few slender setae; propodus posterior margin smooth. Gnathopod 2 minutely chelate; carpus long; propodus palm obtuse, straight; dactylus fitting palm. Pereopod 6 basis posteroventral margin rounded. Pereopod 7 basis posterior margin almost straight, smooth, posteroventral margin rounded. Epimeron 3 posterior ventral corner produced, subacute. Urosomites 1–3 dorsally smooth. Uropod 1 rami subequal in length; uropod 2 rami subequal in length; uropod 3 inner ramus shorter than outer ramus, not reaching article 2 of outer ramus.

Depth range. Depth unknown.

Remarks. Hirayama (1986) probably based his description of this species on a juvenile. Waldeckia orchospina appears to be very similar to W. tomiokaensis and shares the same known distribution. They differ in the shape of the posterior margin of pereopod 7 (straight in W. orchospina and slightly rounded in W. tomiokaensis ) and in the labium which has apical stylets in W. orchospina .

Distribution. Japan: Amakusa Island, Tomioka Bay.

Figures

FIGURE 25. Distribution records for Waldeckia spp. Stars indicate type locality. (a) W. nitens (Haswell, 1879 a), (b) W. nudum (Imbach, 1967), (c) W. obesa (Chevreux, 1905), (d) W. orchospina (Hirayama, 1986), (e) W. selayarensis sp. nov., (f) W. tangaroa sp. nov.