Stylomesus Wolff, 1956

Merrin, K. L. & Poore, G. C. B., 2003, Four new species of Ischnomesidae (Crustacea: Isopoda: Asellota) from off south-eastern Australia, Memoirs of Museum Victoria 60 (2), pp. 285-307 : 300-301

Stylomesus Wolff

Stylomesus Wolff, 1956: 97 .— Birstein, 1960: 15.— Menzies, 1962: 123.— Wolff, 1962: 83.— Birstein, 1971: 204.— Kussakin, 1988: 437.

Gomphomesus . — Wolff, 1962: 84.

Helomesus . — Wolff, 1962: 84.

Type species. Rhabdomesus inermis Vanhöffen, 1914 (by monotypy).

Diagnosis. At least pereonite 7 fused with pleon. Antenna 1 with 6 articles. Antenna 2 supported by anterolateral projections extending from head. Mandibular palp absent. Maxilliped basis endite large, wider than palp, palp articles 2 and 3 not expanded. Pereopod 1 carpus width usually subequal throughout length. Stylet of male pleopod 2 not extending past distal margin of sympod. Uropod long and of 2 articles.

Remarks. The fusion of at least pereonite 7 to the pleotelson and the autapomorphy of the presence of anterolateral projections extending from the head and supporting the antennae is a modification of Wolff’s original description but agrees with that given by Kussakin (1988).