Amblyops tenuicauda W.M. Tattersall, 1911

Wittmann, Karl J., 2020, Lophogastrida and Mysida (Crustacea) of the “ DIVA- 1 ” deep-sea expedition to the Angola Basin (SE-Atlantic), European Journal of Taxonomy 628, pp. 1-43 : 16-17

Amblyops tenuicauda W.M. Tattersall, 1911

Amblyops tenuicauda W.M. Tattersall 1911: 43–45 , pl. 2 fig. 2, pl. 6 figs 2–8.

Amblyops tenuicauda – Illig 1930: 572 (in key). — Tattersall & Tattersall 1951: 253, fig. 59. — Mauchline & Murano 1977: 46, table 1. — Frutos & Sorbe 2008: online table. — San Vicente et al. 2012: 769.

Amblyops tenuicaudus [invalid subsequent emendation] – San Vicente 2017: 160, 178, fig. 4.

Nomenclatorial note

W.M. Tattersall (1911) did not explicitly state a derivatio nominis, however he noted on page 45 “From the type it differs rather markedly in the form of the telson...”. This suggests that he derived the species name from the narrow telson. Be that as it may, ‘ cauda ’ is a Classical Latin noun, while the respective adjective would be ‘ caudalis ’. Therefore, the species name ‘ tenuicauda ’ is to be treated as an amalgamated noun in apposition rather than an adjective. According to Article 31.2.1 of the Nomenclatorial Code ( ICZN 1999), a noun in apposition is to be retained, with gender ending unchanged.

Material examined (non-types only) ANGOLA BASIN • 7 juvs (BL = 1.8–2.6 mm); 22°19.914′ S, 3°17.956′ E to 22°20.049′ S, 3°17.957′ E;

bottom depth 5161–5162 m; 10 Jul. 2000; DIVA-1 exped., #320; ZMH 58258 • 1 imm. (BL = 5.4 mm); 16°16.989′ S, 5°27.279′ E to 16°19.280′ S, 5°27.205′ E; bottom depth 5430–5433 m; 28 Jul. 2000; DIVA-1 exped., #348; supranet of epibenthic sledge; ZMH 58257 .

Type locality

Not stated by W.M. Tattersall (1911). Upon first description, he reported materials from six stations off Ireland, NE-Atlantic, 50– 52° N, 11– 12° W, depth 447–770 fathoms (817–1408 m). One additional sample was stated by him on page 44, but accidentally omitted from the station data on page 69, finally indirectly quoted by Tattersall & Tattersall (1951) as pertaining to the samples from the Faroe Islands.

Distribution

Previously reported from the NE-Atlantic in the range of 44– 60° N, 5– 12° W, depth 450–1408 m ( Tattersall & Tattersall 1951; Frutos & Sorbe 2008; San Vicente 2017). The here documented records in the SE-Atlantic at 16– 22° S, 3– 5° E, depth 5161–5433 m, represent large extensions of the known geographical as well as bathymetrical ranges (see also Discussion).