Thrombasia J. L. Barnard 1966

• Main Authors: Kilgallen, N. M., Lowry, J. K.
• Format: Text
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Amphipoda; Lysianassidae; Thrombasia; Baja; Pacific; Seta; Lowry; South Atlantic Ocean
• Online Access: https://dx.doi.org/10.5281/zenodo.4909743; https://zenodo.org/record/4909743

Thrombasia J.L. Barnard, 1966 Thrombasia J.L. Barnard, 1966: 72.― Ledoyer, 1986: 810. Schisturella .― Barnard & Karaman, 1991: 526 (in part). Type species. Thrombasia tracalero J.L. Barnard, 1966, original designation. Included species. Thrombasia includes six species: T. evalina sp. nov. T. grabenis J.L. Barnard, 1967; T. rotundata (K.H. Barnard, 1926); T. saros sp. nov. T. tracalero J.L. Barnard, 1966; T. umina sp. nov. Diagnostic description. Antenna 1 flagellum article 1 lacking robust seta on distal margin; accessory flagellum forming cap. Antenna 2 flagellum articles 3–5 slender in female, article 3 enlarged in male; articles 3–5 with brush setae on the anterior margin. Mandibular incisor curved; molar a reduced column with convex triturating surface or proximally setose and distally triturating; palp attached midway. Maxilla 1 ST-7 serrate along the distomedial medial margin; ST-D slender, apically cuspidate. Maxilliped outer plate apical robust setae present. Gnathopod 1 subchelate; coxa slightly to greatly shorter than coxa 2, tapering distally; carpus slightly longer than propodus; propodus palm acute, straight. Pereopod 4 coxa with well developed posteroventral lobe. Uropod 2 inner ramus constricted. Uropod 3 rami plumose setae absent in female, present occasionally in adult male. Telson moderately cleft. Remarks. The genus Thrombasia was established by Barnard (1966) for T. tracalero , and was subsequently placed in the synonymy of Schisturella by Barnard & Karaman (1991). However, we consider Thrombasia to be distinct from Schisturella based on the gnathopod 1 coxa, which is tapering and slightly reduced, not vestigial as in Schisturella. There are four other genera in the Tryphosa group with a gnathopod 1 coxa that is not vestigial. Of these, Thrombasia may be separated from Gronella by the gnathopod 1 carpus, which is longer than the propodus, from Tryphosa and Bruunosa in the tapering gnathopod 1 coxa, and from Glorieusella in the subchelate gnathopod 1. Distribution. Pacific Ocean, South Atlantic Ocean. : Published as part of Kilgallen, N. M. & Lowry, J. K., 2014, The Tryphosa group (Crustacea: Amphipoda: Lysianassoidea: Lysianassidae: Tryphosinae), pp. 501-545 in Zootaxa 3768 (5) on page 525, DOI: 10.11646/zootaxa.3768.5.1, http://zenodo.org/record/4909684 : {"references": ["Barnard, J. L. (1966) Submarine canyons of southern California. Part V. Systematics: Amphipoda. Allan Hancock Pacific Expeditions, 27, 1 - 166.", "Ledoyer, M. (1986) Crustaces Amphipodes Gammariens. Familles des Haustoriidae a Vitjazianidae. Faune de Madagascar, 59, 599 - 1112.", "Barnard, J. L. & Karaman, G. S. (1991) The families and genera of marine gammaridean Amphipoda (except marine gammaroids). Records of the Australian Museum, Supplement, 13, 1 - 866. http: // dx. doi. org / 10.3853 / j. 0812 - 7387.13.1991.367", "Barnard, J. L. (1967) Bathyal and abyssal gammaridean Amphipoda of Cedros Trench, Baja California. Bulletin of the United States National Museum, 260, 1 - 205. http: // dx. doi. org / 10.5479 / si. 03629236.260.1"]}