Waldeckia selayarensis, Lowry, J. K. & Kilgallen, N. M., 2014

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 : 333-335

Waldeckia selayarensis sp. nov.

( Figs 21 , 25 e)

Waldeckia kroyeri kroyeri Pirlot, 1936: 268 , fig. 105C.

Types. Holotype, male, approximately 13.0 mm, ZMA.CRUS.P.9835–9847, Banda Sea, Indonesia (7°0.0’S 120°34.5’E), 120–400 m, pale grey mud to coralline sand, dredge, 1–2/05/1899, Siboga stn 65a.

Additional material examined. Western Australia: 5 specimens, AM P.55084, [01-B18-S] North West Shelf (20°1.2’S 116°57.5’E) 22/02/1983, epibenthic sled, coll. CSIRO North-West Shelf project on the FRV Soela.

Indonesia: 1 juvenile, ZMA. CRUS.P.9805–9809, Sailus Ketjil, Paternoster Islands [= Pulu Tenga, Indonesia, Bali Sea, approximately 7°30.0’S 117°30.0’E], to 27 m, coral and coral sand, dredge or Monaco-trap, 30–31 March 1899, Siboga stn 37; 2 specimens, ZMA. CRUS.P.9810–9811 and ZMA. CRUS.P.9812–9813, anchorage off Pulu Sarassa, Postillon Islands, [= Sabatana, Flores Sea, Indonesia, approx. 6°30.0’S 119°00.0’E], 36 m, coral, dredge, 4– 5 April, 1899, Siboga stn 43; 1 female, ZMA. CRUS.P.9814–9816, southern part of Molo Strait, [ Indonesia, approx. 9°00.0’N 120°00.0’E], 69–91 m, fine sand or hard sand with broken shells and stones, dredge and trawl, 19/04/1899, Siboga stn 51; 1 male, ZMA. CRUS.P.9817–9834, Banda Sea, Indonesia], 7°00.0’S 120°34.5’E, 120– 400 m, pale grey mud to coralline sand, dredge, 1–2/05/1899, Siboga stn 65a; 1 male, ZMA. CRUS.P.9848–9852, [north-west of Waigeo Island, Indonesia], 0°03.8’N 130°24.3’E, 141 m, fine and coarse sand with dead shells, dredge, 14 August 1899, Siboga stn 153.

Etymology. Named for the Selayar Islands, Indonesia, close to the type locality.

Diagnostic description. Head lateral cephalic lobe large, broadly rounded. Antenna 1 peduncular article 1 without anterodistal projection. Labrum, epistome and upper lip fused. Mandible palp article 2 anterodistal margin setose; article 3 with marginal and apical setae. Labium without apical stylets on each lobe. Gnathopod 1 parachelate; basis anterior margin with slender setae; propodus posterior margin smooth. Gnathopod 2 subchelate; carpus long; propodus palm transverse, concave; dactylus not fitting palm. Pereopod 6 basis posteroventral margin rounded. Pereopod 7 basis, posterior margin slightly rounded, serrate, posteroventral margin straight. Epimeron 3 posteroventral corner narrowly rounded. 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, reaching to article 2 of outer ramus.

Depth range. 27– 400 m.

Remarks. Pirlot (1936) originally recorded this species as Waldeckia kroyeri kroyeri . We have re-examined the material described by him and concluded that it in fact represents a distinct species. Although the differences between the taxa are subtle, W. selayarensis sp. nov. can be distinguished from W. kroyeri by the more rounded shape of the posteroventral margin of the pereopod 6 basis, the broader palm and larger, more slender dactylus of gnathopod 2, and the subequal lengths of the uropod 2 rami. The body size of W. selayarensis sp. nov. is also noticeably smaller than that of W. kroyeri .

Distribution. Australia: North West Shelf, Western Australia. Indonesia: Paternoster Islands; Postillon Islands; Molo Strait; Banda Sea; Waigeo Island.

Figures

FIGURE 21. Waldeckia selayarensis sp. nov. holotype male, ~ 13.0 mm, ZMA. CRUS. P. 9835 – 9847, Banda Sea, Indonesia (approx. 7 ° 0.0 ’ S 120 ° 34.5 ’ E). Scale bars: G 1, 2, P 5 – 7, 0.5 mm; U 1 – 3, 0.25 mm.

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.