Neoarcturus longispinus (Kensley, 1984) Poore, 2003

Poore, G. C. B., 2003, Revision of Holidoteidae, an endemic southern African family of Crustacea, and re-appraisal of taxa previously included in its three genera (Isopoda: Valvifera), Journal of Natural History 37, pp. 1805-1846 : 1827-1828

Neoarcturus longispinus (Kensley, 1984) comb. nov.

(figure 6G, H)

Microarcturus longispinus Kensley, 1984: 245–248 , figure 16a–f.

Material examined Holotype female, SAM A17810 ; paratype male, SAM A17811 .

Diagnosis

Eyes pigmented. Dorsum scarcely tuberculate, with dominant pairs of submedial spines on head (two pairs), pereonites 1–7 and pleonites 1–3 (one pair on each) and dorsolateral spines on pereonites 1–3 (especially female). Pereonites 2 and 3 of female with prominent lateral wings, each with anterior and posterior spines; pereonites 4–7 and pleonites with similar but smaller lateral wings (male with shorter less spinose wings). Pleotelson apex strongly apically produced as spine, posterolateral margins with well-defined spines. Male pleonite 2 strongly elevated as paired dorsolateral bosses, pleonite 3 with lower dorsomedial boss. Posteroventral margin of pereonite 4 of male with bilobed flat plate. Male to 6.5 mm; female to 6.2 mm.

Remarks

This is the only species with a long produced pleotelsonic apex. The species is found in the East London area, south-eastern South Africa, at 650–775 m depth.