Coelometopon coronatum, Perkins, 2005

Perkins, Philip D., 2005, A revision of the African hygropetric genus Coelometopon Janssens, and description of Oomtelecopon new genus (Coleoptera: Hydraenidae), Zootaxa 949 (1), pp. 1-103 : 1-103

Coelometopon coronatum new species

(Figures 23, 24, 77)

Type Material. Holotype (male): Lesotho: Mamathes , 5 mi. E. Tayateyaneng, SSAE 252, [29° 9' S, 27° 50' E], 29 March 1951, Brinck & Rudebeck; deposited in the LUM . Paratype: South Africa: Transvaal Prov. , Blouberg, 23° 5' S, 29° 0' E, 9 January 1955, C. Rudebeck — (1 male LUM) .

Diagnosis. Recognized among endroedyi group members by the cordiform pronotum which is not emarginate behind the anterior angles.

Description. Size (length/width, mm x 100) holotype: body (length to elytral apices) 252/111, head 56/63, pronotum 56/86, elytra 164/111. Dorsum black. Maxillary palpus slightly shorter than width of anterior margin of clypeus, last three palpomeres subequal in length, each slightly wider than preceding. Mentum weakly produced apicomedially; depressed on each side of midline near base. Granules of frons and pronotum very similar, finer and sparser on clypeus. Pronotum cordiform, sides rounded at midlength, not emarginate or very obsoletely so behind anterior angles.

Elytral intervals: 2nd subcostate in front of and behind weak saddle and irregularly over posterior declivity; 4th raised slightly in interrupted sections; 1st, 3rd and 5th each with unilinear row of granules, granules of a row separated by 1–3x granule diameter; 7th with non­interrupted unilinear row of granules. Metasternum with oval depression posteriorly rimmed. Females unknown.

Aedeagus length 0.74 mm; mainpiece markedly sinuate, ridged process large, angled such that it appears about same width in ventral and lateral views, apex rises above level of gonopore process tip; gonopore process angled toward left in ventral aspect, slightly longer than ridged process and nearly twice as long as membranous process (Fig. 24).

Etymology. Named in reference to the crown­shaped aedeagal apex.

Distribution. Currently known from two disjunct localities, one each in Lesotho and Transvaal Province (Fig. 77).