Liocoryphe, Serov & Wilson, 1995

Serov, Peter A. & Wilson, George D. F., 1995, A review of the Stenetriidae (Crustacea: Isopoda: Asellota), Records of the Australian Museum 47 (1), pp. 39-82 : 73-76

Liocoryphe n.gen.

Figs 1G,H , 3D

Type species. Liocoryphe minocula ( Menzies & Glynn, 1968) .

Species included. See Table 1 .

Etymology. Liocoryphe is derived from the Greek words "lius" meaning smooth, and "coryphe" meaning crown of the head. The name refers to the smooth head of this genus which lacks spines or lateral fields. The gender is feminine.

Diagnosis. Head dorsal surface smoothly rounded and frontal margin with no lateral spines, antennal spines rounded and much reduced, shorter than rostrum. Rostrum short, broad, rounded; eyes reduced to small rounded, anterolateral group of ocelli. Antennular flagellum with 4-6 articles. Antennal article 1 without lateral spines. Maxilliped endopodite distal margin with 4 fan setae. Pereonite lateral margins blunt to rounded; double coxal extensions visible on pereonites 2-4, single extensions on pereonites 5-6. Male pereopod I dactylus shorter than propodal palm; propodal palm serrate; carpus ventral margin with large, broad, blunt extension; male pereopod covered in long, dense setae from ischium to propodus. Male pleopod 11 protopod with small pointed apical extension; exopod subapical; appendix masculina elongate with blunt distal tip and subapical row of short, proximally directed cuticular hairs, distal tip narrowed slightly. Pleotelson with 2 free pleonites. Pleotelson longer than wide, smoothly truncated to posterolateral spine then smoothly rounded with no telsonic projection between uropods.

Remarks. Liocoryphe is closely related to Hansenium and is distinguished by the males having an extended carpus. This genus gains separate generic status by lacking lateral spines on the head, having a small round group of ocelli, a short blunt rostrum, and a large blunt extension on the carpus that does not participate in grasping with the dactylus.

Figures

Fig. 1. Stenetriid genera showing body form and male pleopod H. A,B, Stenetrium Haswell sensu stricto . C,D, Tristenium n.gen. (after Muller, 1991c, figs 1, 13). E,F, Hansenium n.gen. ( after Menzies & Glynn, 1968, fig. 34). G,H, Liocoryphe n.gen. (after Muller, 1990, figs 1, 14).