Caribboecetes, Just, 1983

Just, Jean, 1998, Siphonoecetinae (Crustacea: Amphipoda: Ischyroceridae) 7: Australian Concholestids, Ambicholestes n. gen., with a Description of Six New Species, and a New, Restricted Diagnosis for Caribboecetes Just, 1983, Records of the Australian Museum 50 (1), pp. 27-54 : 28-29

publication ID

https://doi.org/ 10.3853/j.0067-1975.50.1998.1273

DOI

https://doi.org/10.5281/zenodo.4657183

persistent identifier

https://treatment.plazi.org/id/B128F865-0E27-E826-F9F0-FB62FCF7D2A1

treatment provided by

Felipe

scientific name

Caribboecetes
status

 

Review of Caribboecetes View in CoL

Caribboecetes Just, 1983 View in CoL , differs from other concholestids by having a short, flattened inner ramus on uropod 1 and no ramus on uropod 3. Concholestes Giles, 1888 has a long and cylindrical inner ramus on uropod 1 and no ramus on uropod 3, while Africoecetes Just, 1983 has one ramus on uropod 3. Following the discovery of several new

concholestids from Australia and a re-evaluation of the Caribboecetes species described by Just (1983, 1984a) it has become clear that Caribboecetes must be divided into two groups based primarily on the structure of the lower lip and the setation on pereopod 7. Caribboecetes barbadensis (type-species of the genus), c. jenikarpae , and C. intermedius have the inner lobes of the lower lip simple, more or less ovoid, while C. crassicornis , C. magellani , and C. squamiferus have uniquely and complexly lobate inner lobes ( Fig. 2 View Fig ) with a proximolateral backward curving projection on each lobe and the proximal lobe margin produced and set at an angle of up to 45 degrees with the inner lobe plane. The three last mentioned species have a midlateral, longitudinal row of setae on article 2 of pereopod 7 in addition to the normal marginal setae. The densely setose anterior lateral surfaces of coxal plate 7 and article 2 of pereopod 7 in C. jenikarpae are considered independently derived autapomorphisms.

On this basis a new genus, Ambicholestes , is established for C. crassicornis , C. magellani , C. squamiferus and the Australian concholestids described below. Diagnostic differences between Caribboecetes and Ambicholestes are summarised in Table 1 View Table 1 (p. 53).

The structure of the lower lip in Caribboecetes pterycornis is not known (lost during original dissection). In spite of several autapomorphic attributes, which set this species apart from other Caribboecetes , I tentatively retain it in that genus on account of the lack of a midlateral row of setae on article 2 of pereopod 7.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Amphipoda

Family

Ischyroceridae

Loc

Caribboecetes

Just, Jean 1998
1998
Loc

Caribboecetes

Just 1983
1983
Loc

Africoecetes

Just 1983
1983
Loc

Concholestes

Giles 1888
1888
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