Siphonoecetes Krøyer, 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 : 329-330

Siphonoecetes Krøyer, 1845

Siphonoecetes (Siphonoecetes) Krøyer, 1845: 481 .—By Just (1983: 124).

Type species. Siphonoecetes typicus Krøyer, 1845 .

Diagnosis. Siphonoecetina with rostrum present. Flagellum of antenna 2 article 2 with 1, article 3 with 2 distal robust setae ( Fig. 3 E 1 ). Pereopods 5–6 carpus with 1 long terminal and 1–3 short robust setae. Uropod 1 peduncle with ventroapical fimbriate or denticulate corona margin. Inner ramus of uropods l and 2 slender, subcylindrical, with a single robust seta in apical hollow. Uropod 3 peduncle distal margin naked or with a few short setae ( Fig. 3 G 2 ).

Component species. Siphonoecetes typicus Krøyer, 1845 ; S. smithianus Rathbun, 1905 ; S. sabatieri Rouville, 1894 (provisionally placed here).

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).