Paranthura seychellensis, Kensley & Schotte, 2000

Kensley, B. & Schotte, M., 2000, New species and records of anthuridean isopod crustaceans from the Indian Ocean, Journal of Natural History 34, pp. 2057-2121 : 2114-2116

Paranthura seychellensis sp. nov.

(Figure 39)

Type material. HOLOTYPE: USNM 253174 , ovigerous m 5.2 mm, sta J-SEY-2, coralline algae from reef crest, Mahe Beach , Mahe Is., Seychelles, 1±1.5 m, 30 April 1984 . PARATYPES: USNM 253175 , one l 4.8 mm, ®ve non-ovigerou s m 4.1±4.5 mm, eight juveniles, sta J-SEY-2, same data as holotype . USNM 253176 , one l 4.1 mm, two juveniles, sta K-SEY-7, coralline algae (mainly Amphiroa sp. ) on reef ¯at, Mahe Beach , Mahe Is., Seychelles, 30 April 1984 . USNM 253177 , one ovigerous m 4.8 mm, one non-ovigerous m 4.2 mm, two juveniles, sta K-SEY-22, algal turf on granite boulders, Anse Marie Louise , Mahe Is., Seychelles, 1 m, 25 March 1989 .

Other material examined. USNM 253178 , eight m, ®ve ovigerous m, eight nonovigerous m, ®ve juveniles, from 13 stations, rubble and algal turf, Mahe Is., Seychelles, 0.5±6 m.

Diagnosis. Female: Telson about 2.5 times longer than greatest width; posterior margin evenly rounded. Antennular ¯agellum of four articles. Antennal ¯agellum of single setose article. Pereopod 1, carpus triangular, with few distal setae; propodus expanded, with low proximal lobe, palm straight, with row of 17 subpalmar setae FIG. 39. Paranthura seychellensis sp. nov.: (A) m antennule; (B) lantennule; (C) antenna; (D) uropodal protopod and endopod; (E) uropodal exopod; (F) pleotelson; (G) pereopod 1; (H) lpleopod 2; (I) pleopod 1; (J) pereopod 7; (K) pereopod 2; (L) pereopod 3.

on mesial surface. Pereopods 2 and 3, carpus triangular, with three distal setae; propodi barely expanded, with ®ve sensory setae on posterior margin. Pereopod 7, carpus with anterior margin slightly shorter than posterior, with two sensory setae on posterior margin; propodus about three times longer than wide, with three sensory setae and several fringed scales on posterior margin. Pleopod 1, endopod slightly shorter than, and almost one-quarter width of exopod, with ten distal plumose marginal setae. Uropodal exopod elongate/ovate, distally subacute, lateral margin faintly crenulate; endopod distally rounded, setose, slightly longer than basal width.

Male: Antennular ¯agellum of six articles, aesthetascs on 2±5. Pleopod 2, copulatory stylet reaching well beyond ramus, club-shaped, apically hooked.

Etymology. The speci®c name derives from the type locality, the Seychelles Islands.