Eisothistos andamanensi

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 : 2071-2072

Eisothistos andamanensi s sp. nov.

( Figures 9, 10)

Type material. HOLOTYPE: USNM 253129 , non-ovigerous m 6.0 mm, west coast of Thailand, Fifth Thai-Danish Expedition , January ± March 1966 . PARATYPES: USNM 253130 , six non-ovigerous m 3.9±5.2 mm (one with two manca in same serpulid tube), one immature female, same data as holotype .

Diagnosis. Non-ovigerous female: Body slender, integument other than of tailfan thin; pereonites 2±5 elongate, uropods and telson sclerotized; telson with posterolateral margins spinose, slight median ridge bearing longitudinal row of about nine or ten large spines plus several smaller spinules. Antennule with ¯agellum of seven articles. Antennal peduncle article 5 equal to articles 3 and 4 together; ¯agellum of six articles. Mandible thin, lamellate. Maxilla thin-walled, spines barely discernible distally. Pereopod 1 bearing several elongate setae on merus, ischium and basis; unguis of dactylus relatively short. Pereopod 2 with blunt tubercles on posterior surface of ischium and merus; propodus with row of short setae on posterior margin, short blunt posterodistal seta; unguis about one-®fth length of rest of dactylus. Pereopod 7 with elongate setae on merus, ischium and basis; carpus with posterior margin slightly shorter than anterior; propodus about 3.5 times longer than wide, with short setae on posterior margin, short blunt posterodistal seta; unguis about one-®fth length of rest of dactylus. Pereopod 7 with elongate setae on merus, ischium and basis; carpus with posterior margin slightly shorter than anterior; propodus about 3.5 times longer than wide, with short setae on posterior margin, short blunt posterodistal seta. Pleopod 1, rami fused for four-®fths of length of endopod; both rami having six distal plumose setae. Uropodal exopod with elongate spike on lateral margin; latter bluntly spinose; endopod ovate, distally acute, margins bluntly spinose.

Etymology. The speci®c name derives from the Andaman Sea.