Caribboecetina

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 : 333

Caribboecetina

1. Rostrum bifid; eyes on lateral surface of head, not on projecting eyelobes; article 2 of mandible palp longer than wide at base; inner ramus of uropod 1 about as long as outer, cylindrical............................... Concholestes Giles, 1888

- Rostrum normal or absent; eyes on projecting lobes; article 2 of mandible palp vestigial or absent; inner ramus of uropod 1 at most half length of outer, flattened........................................................................ 2

2. Uropod 3 without ramus............................................................................... 3

- Uropod 3 with articulating ramus........................................... Africoecetes armatus ( Griffiths, 1974)

3. Pereopods 5–7 without accessory claw.................................................................... 4

- Pereopods 5–7 with accessory claw.......................................... Polynesoecetes kekeae Myers, 1989

4. Ocular field of eye lobes inflated; inner lobes of lower lip complexly lobate ( Fig. 4 C ); basis of pereopod 7 lateral surface with vertical row of long setae in middle ( Fig. 4 E 1 )............................................................. 5

- Ocular field of eye lobes not inflated; inner lobes of lower lip simple ( Fig. 4 D ); basis of pereopod 7 lateral surface without row of long setae in middle ( Fig. 4 E 2 )................................................... Caribboecetes Just,1983 J

5. Mandible palp 2-articulate, barely reaching beyond apex of incisor ( Fig. 2 2a ); male antenna 2 at most as long as head and pereon combined............................................................... Ambicholestes Just, 1998 K

- Mandible palp 1-articulate, pointed, overreaching incisor with at least 1/3 palp length ( Fig. 2 2b ); male antenna 2 at least as long as head, pereon and pleon combined............................................. Australolestes Just, 2011 L

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 2. A, Ericthonini; B, Cerapodini; C, Siphonoecetini. 1, antennae; 2, mandibles; 3, gnathopod 1; 4, gnathopod 2 (c 1 simple and c 2 subchelate forms); 5 a, pereopods 5 – 7; 5 b, pereonite 5 with coxa; 6, telson with uropod 3. (A 2 from Lowry & Berents 1996; A 6 from Lowry & Berents 2005; B 2 from Krapp-Schickel 2013.)

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.