Ambicholestes Just, 1998

Just, Jean, 2017, A fresh look at the higher classification of the Siphonoecetini Just, 1983 (Crustacea, Amphipoda, Ischyroceridae) 12: with a key to all taxa, Zootaxa 4320 (2), pp. 321-338 : 332

Ambicholestes Just, 1998 , stat. nov.

Ambicholestes (Ambicholestes) Just, 1998: 32 .

Type species. Caribboecetes magellani Just, 1984a .

Diagnosis. Caribboecetina with mandibular palp blunt, with small second article, not overreaching mandible body. Inner ramus of uropod 1 at most 1/2 length of outer ramus, flattened, with robust setae on margin (except Concholestes , longer, cylindrical). Inner lobes of lower lip complexly lobate ( Fig. 4 C ). Ocular field of eye lobes inflated. Male antenna 2 at most as long as cephalon and pereon combined. Basis of pereopod 7 with marginal setae and midlateral, longitudinal row of setae ( Fig. 4 E 1 ). Uropod 3 without ramus.

Component species. Ambicholestes crassicornis ( Just, 1984a) ; A. cygnatratus Just, 1998 ; A. magellani ( Just, 1984a) ; A. nanshaensis ( Ren, 2006) comb. nov.; A. poorei Just, 1998 ; A. squamiferus ( Just, 1984a) ; A. trilobatus Just, 1998 .

Figures

FIGURE 1. A. The relationship among the proposed tribes in the subfamily Ischyrocerinae based on clades identified by Lowry & Berents (1996). B. Subtribes in tribe Siphonoecetini as established here. (Illustrated: A, Cephaloecetes schioettei Just, 2017, in abode; B, Rhinoecetes coclearis Just, 2012 a, abode aggregation).

FIGURE 4. A, lateral and dorsal views of heads of Rhinoecetes spp.; B, lateral view of head with pseudorostrum; C, complexly lobate lower lip; D, simple lower lip; E, pereopod 7; F, rami of uropod 1 of Rhinoecetes spp., G, uropod 3 with rounded ramus; H, natatory antenna 2 of Australoecetes sellicki.