The alpheid shrimp genus Leptalpheus Williams, 1965, in the Tropical Western Pacific, with descriptions of two new species (Crustacea: Decapoda: Caridea)

Two new species of the alpheid shrimp genus Leptalpheus Williams, 1965, are described from the tropical western Pacifi c. Leptalpheus denticulatus, new species, is described on the basis of several specimens collected in Nhatrang Bay, Vietnam (type locality); Panglao, off Bohol, the Philippines; and Yaqara Bay, Viti Levu, Fiji. Leptalpheus dworschaki, new species, is described on the basis of two specimens collected in Panglao. All specimens were collected from burrows of callianassid ghost shrimps, including Glypturus cf. armatus (A. Milne-Edwards, 1870) and Neocallichirus calmani (Nobili, 1904). Both L. denticulatus, new species, and L. dworschaki, new species, are closely related to L. pacifi cus Banner & Banner, 1974, from Hawaii, differing from the latter species in subtle morphological details.