Nototanaidae Sieg 1976

• Main Authors: Esquete, Patricia, Bamber, Roger, Aldea, Cristian
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Malacostraca; Tanaidacea; Nototanaidae; Antarc*; antarcticus
• Online Access: https://doi.org/10.5281/zenodo.5658960; http://treatment.plazi.org/id/DE4D87DFFFBCFFFBD3D2E133A054FAEF

Family NOTOTANAIDAE Sieg, 1976 Genus Nototanais Richardson, 1906 Nototanais dimorphus (Beddard, 1886) Figs 9–10 Paratanais dimorphus Beddard, 1886a, p.119; 1886b, pp.130–132. pl. XVIII, figs. 1–8. Nototanais dimorphus Richardson, 1906, p.187; 1908, pp.1–3, Fig. 1 Nototanais australis Richardson, 1908, p. 1, fig. 1. Nototanais australis Vanhöffen, 1914, p. 470. Notototanais magellanicus Monod, 1925, p. 296; 1926, p. 10, fig. 1. Nototanais dimorphus Shiino, 1970, PP. 85-91, figs. 6-10. Nototanais australis Lang, 1973, p. 222. Nototanais dimorphus Sieg, 1980b, pp.54-60, figs. 6, 8–9 and 11. Material examined: 1 female, 51º04.08ʹS 74º08.49ʹW, rocky bottom, 5–15 m, 27 January 2010; 18 neuters and females, 50º50.74ʹS 74º01.58ʹW, rocky bottom, 5–15 m, 28 January 2010; 1 female, 48º40.48ʹS 74º27.46ʹW, rocks with red algae, 5–15 m, 22 March 2010. All coll. R. Barría, E. Newcombe, M. Hune, T. Césped. M. Palacios, C. Cárdenas, A. Montiel, M. Hune and C. Aldea. Nototanais dimorphus is, as its specific name suggests, a strongly dimorphic species. Only juveniles and females were found in BONP. Consequently, the diagnosis proposed herein obviates sexual dimorphic characters, but is valid for both genders. Drawings of the specimens from BONP are included to complete previous descriptions (i.e. Beddard, 1886; Shiino, 1970) and revisions (Sieg, 1980b). Diagnosis: Nototanais with body relatively narrow; maxillular palp bearing two long, terminal setae; pereopods 4 to 6 merus bearing long, straight, terminal spines. Remarks: Body length of specimens from BONP: 2.2–2.7 mm. In our specimens, the spines on the carpus of pereopods 4 to 6 are long and straight (Figs 10 D, F), reaching (at least two of them) half of the length of the propodus. Although Shiino (1970) illustrates these spines as being significantly shorter, our specimens agree with Sieg (1980b), who considered them as a diagnostic character that differentiates N. dimorphus from N. antarcticus (with short, finely plumose spines). Shiino (1970) observed three spines on the ...