Caribboecetes Just 1983
Creators: name: Just, Jean
Publisher: name: Zenodo
Year: 1998
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Amphipoda
Ischyroceridae
Caribboecetes

description: Review of <i>Caribboecetes</i> <i>Caribboecetes</i> Just, 1983, differs from other concholestids by having a short, flattened inner ramus on uropod 1 and no ramus on uropod 3. <i>Concholestes</i> Giles, 1888 has a long and cylindrical inner ramus on uropod 1 and no ramus on uropod 3, while <i>Africoecetes</i> Just, 1983 has one ramus on uropod 3. Following the discovery of several new concholestids from Australia and a re-evaluation of the <i>Caribboecetes</i> species described by Just (1983, 1984a) it has become clear that <i>Caribboecetes</i> must be divided into two groups based primarily on the structure of the lower lip and the setation on pereopod 7. <i>Caribboecetes barbadensis</i> (type-species of the genus), c. <i>jenikarpae,</i> and C. <i>intermedius</i> have the inner lobes of the lower lip simple, more or less ovoid, while C. <i>crassicornis,</i> C. <i>magellani,</i> and C. <i>squamiferus</i> have uniquely and complexly lobate inner lobes (Fig. 2) 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. <i>jenikarpae</i> are considered independently derived autapomorphisms. On this basis a new genus, <i>Ambicholestes,</i> is established for C. <i>crassicornis,</i> C. <i>magellani,</i> C. <i>squamiferus</i> and the Australian concholestids described below. Diagnostic differences between <i>Caribboecetes</i> and <i>Ambicholestes</i> are summarised in Table 1 (p. 53). The structure of the lower lip in <i>Caribboecetes pterycornis</i> is not known (lost during original dissection). In spite of several autapomorphic attributes, which set this species apart from other <i>Caribboecetes,</i> I tentatively retain it in that genus on account of the lack of a midlateral row of setae on article 2 of pereopod 7.
description: Published as part of <i>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, pp. 27-54 in Records of the Australian Museum 50 (1)</i> on pages 28-29, DOI: 10.3853/j.0067-1975.50.1998.1273, http://zenodo.org/record/4656898
description: {"references": ["Just, J., 1983. Siphonoecetinae subfam. n. (Crustacea, Amphipoda, Corophiidae) 1: Classification. Steenstrupia 9 (6): 117 - l 35.", "Giles, G. M., 1888. Further notes on the Amphipoda of Indian waters. Natural History Notes from H. M. ' s Indian Marine Survey Steamer \" Investigator \". Journal of the Asiatic Society of Bengal 57, 2 (3): 220 - 255.", "Just, J., 1984 a. Siphonoecetinae (Crustacea, Amphipoda, Corophiidae) 2: Caribboecetes Just, 1983, with description of six new species. Steenstrupia 10 (2): 37 - 64."]}