Siphonoecetes, Kroyer, 1845, Kroyer, 1845

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

Siphonoecetina

1. With ordinary, strong to weak rostrum ( Fig. 4 A–B ).......................................................... 2

- Without rostrum; pseudorostrum projecting from frons ( Fig. 4 C )............................................... 4

2. Distal margin of peduncle of uropod 3 with few simple setae ( Fig. 4 G 2 ). Male peduncle of uropod 1 with ordinary convex corona ( Fig. 3 E 1 )............................................................. Siphonoecetes Krøyer, 1845 A

- Distal margin of peduncle of uropod 3 with row of long, pectinate setae ( Fig. 4 G 1 ) Male with bulbous ventroapical projection on peduncle of uropod 1 ( Fig. 3 F 2 )................................................. Centraloecetes Just, 1983 B

4. Antenna 2 peduncle articles 4 and 5 with many long, plumose, natatory setae ventrally; abodes made of light plant material........................................................................ Australoecetes sellicki ( Sheard, 1936)

- Antenna 2 peduncle articles 4 and 5 with normal siphonoecetid simple setae; abodes of empty micromolluscs, polychaete tubes and similar items furnished with sand and shell tube................................... Stebbingoecetes Just,1985 C

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 3. A, coxal plate 2 (and 3); B, distal parts of pereopod 5 (and 6); C 1, Siphonoecetina urosome, C 2 and C 3, Bubocorophina urosomes, C 4, Caribboecetina urosome; D, sternal papillae on pereonite 7. E, antenna 2 flagellum, 1 – 3 articles 1 – 3; F, uropod 1, vv ventral view, lv lateral view, (refers to keys below).

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.