Pseudotanais, G. O. Sars, 1882

Bird, Graham J., 2019, Tanaidacea (Crustacea: Peracarida) from the Southern French Polynesia Expedition, 2014. I. Tanaidomorpha, Zootaxa 4548 (1), pp. 1-75 : 45

Pseudotanais sp. FP#1

( Fig. 22 )

Material examined. One non-ov. ♀ (?), 1.0 mm, one ov. ♀, 1.5 mm, P. 102327, Stn 28-61.

Distribution. Anarua Bay, Rapa Iti, Austral Islands, coral rubble, 16.5– 17 m.

Remarks. Species-identification of these two small specimens (one in poor condition and partly covered with detritus) was not possible, although they have non-forcipate chelae ( Fig. 22A ), setose pereopod-1 basis ( Fig. 22B ), and pereopods 2–3 propodal setation of a “ non-affinis ” group, i.e. with the inferodistal (and anaxial) spine Fig. 22C ) clearly shorter than the claw (dactylus and unguis), rather than being as long as or nearly as long ( Bird & Holdich 1989). The cephalothorax is about as long as pereonites 1–3 combined and the length ratio of pereonites 1–3 is 6:10:15. The pereopods are slender, as are the uropods ( Fig. 22D ). Additional material of this species is needed to clarify its taxonomy.

Figures

FIGURE 22. Pseudotanais sp. FP#1. Ovigerous female (P.102327). A, right chela; B, pereopod-1; C, pereopod-2; D, uropod. Scale bars: 0.1 mm.