Carangolioides, Sittrop & Serejo & Souza-Filho & Senna, 2014

Sittrop, Daniela J. P., Serejo, Cristiana S., Souza-Filho, Jesser F. & Senna, André R., 2014, New genera and species of Urothoidae (Amphipoda) from the Brazilian deep sea, with the re-assignment of Pseudurothoe and Urothopsis to Phoxocephalopsidae, Journal of Natural History 49 (9), pp. 527-552 : 531-533

Carangolioides gen. nov.

Diagnosis

Body globular. Eyes absent. Antenna 1 accessory flagellum 3-articulate. Mandible molar present; lacinia mobilis present; incisor smooth. Upper lip distal margin truncated. Lower lip outer lobe with distolateral projection. Maxilla 1 palp article 1 longer than article 2. Gnathopods 1–2 subchelate. Pereopod 5 coxa posterior lobe present. Epimeral plate 3 without ornamentations. Uropods 1–2 styliform. Uropod 3 short, inner ramus shorter than outer ramus article 1, which is two to four times the article 2 length.

Type species

Carangolioides castellatus gen. nov. et sp. nov.

Composition

The genus Carangolioides gen. nov. groups two species: Carangolioides castellatus gen. nov. et sp. nov. and Carangolioides hamatus gen. nov. et sp. nov.

Etymology

The name Carangolioides refers to the morphological similarity of this genus to Carangolia . Gender masculine.

Remarks

Carangolioides gen. nov. differs from the other genera previously described in the family by the upper lip with distal margin truncated and lower lip with distolateral projection on the outer lobe.

The new genus is similar to Carangolia by the globular shape of the body, pereopods 3 and 4 similar to each other, with marginal and facial stout setae on carpus and propodus, and the extremely enlarged mandible with incisor strongly developed. However, in Carangolioides gen. nov. the accessory flagellum on antenna 1 is short, but well developed, molar and lacinia mobilis are present, and the telson is longer than wide.

The studies of Barnard (1961) and Bellan-Santini and Ledoyer (1986) do not present complete descriptions and illustrations of the type materials, besides the lack of details of their mouthparts, which makes it difficult to determine the character variations of the mouthparts of Urothoidae . To establish the states of those characters, the studies of Barnard (1962) and Jaume and Sorbe (2001) were used, with complete descriptions of the type species Carangolia mandibularis Barnard, 1961 and the holotype of Carangolia barnardi Jaume and Sorbe, 2001 respectively.