Hansenium expansum, Kensley & Schotte, 2002

Kensley, B & Schotte, M, 2002, New species and records of Asellota from the Indian Ocean (Crustacea: Peracarida: Isopoda), Journal of Natural History 36, pp. 1421-1461: 1445-1446

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Hansenium expansum

sp. nov.

Hansenium expansum   sp. nov.

(Žgure 14)

Type material. HOLOTYPE: USNM 253205 View Materials , 3.1 mm, sta JR-33 A, Nosy Bé , Madagascar, 1 m, 15 January 1964   . PARATYPES: USNM 253206 View Materials , two 2.8–3.1 mm, four ovigerous 2.9–3.0 mm, four juveniles, same data as holotype   ; USNM 253207 View Materials , two 2.8 mm, three, sta   JR-29 A, Nosy Bé , Madagascar, 1.5 m, 11 January 1964   .

Other material. ZMUC, two, one ovigerous, one, sta CRU-1893, coral from Murogo Reef , Zanzibar, 14 m, 20 September 1995   ; ZMUC, four, two ovigerous, two, Žve juveniles, sta CRU-1926, Murogo Reef , Zanzibar, 9 m, 20 September 1995   .

Diagnosis. Rostrum basally wider than long, tapering to truncate anterior margin. Pleotelson 1.2 times wider than midlength, lateral margin with single tooth. Eyes reniform. Pereopod 1 in male, carpus with lateral surface expanded into broad subcircular lobe bearing fringe of setae; propodus with proximal region of posterior margin expanded into broad setose lobe bearing single articulated robust seta, distinctly oVset from rest of palm, latter with four low triangular teeth; dactylus with row of 12 short serrate setae on posterior margin. Operculum of female shield-shaped, 1.5 times longer than greatest width.

Etymology. The speciŽc name refers to the expanded nature of the carpus of pereopod 1 in the male.


Zoological Museum, University of Copenhagen