Coelometopon kilimanjaro, 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 kilimanjaro new species

(Figures 51, 52, 86)

Type Material. Holotype (male): Tanzania: Kilimanjaro, Marangu , 1550 m., residu de foret de transition, J. Leleup. Deposited in the MRAC . Paratypes: Kenya: SE Loitokitok (= Oloit.), 1800m, Narumora rv., [ca. 2° 56' S, 37° 30' E], 11 January 1994, H. Zettel (3) — (13 NMW) .

Diagnosis. Recogized by the large size (ca. 3.11 mm), the comparatively large clypeus and small labrum, and the very wide pronotal lateral depressions. Larger than C. cavifrons , differently colored, and with the pronotum more granulate bordering the median groove. Females are additionally recognized by the apical callosity on each elytron, and the humped pronotal disc.

Description. Size (length/width, mm x 100) holotype: body (length to elytral apices) 311/148, head 67/85, pronotum 70/122, elytra 215/148. Dorsum black.

Frons granulate except non­granulate and shining on each side of midlongitudinal band or row of granules on disc. Granules of frons and pronotum similar in size, clypeus non­granulate or granules minute. Labrum small, margin reflexed in form of two small triangular lobes. Maxillary palpus slightly shorter than width of anterior margin of clypeus, last three palpomeres length ratios as 1/0.8/1, maximum widths similar. Mentum weakly produced apicomedially; depressed on each side of midline near base, depressions separated by midlongitudinal ridge.

Pronotum with non­granulate areas on disc; lateral depressions with granules much finer and sparser than those on disc; disc transversely quite convex; sides angulate at midlength, straight in front of and emarginate behind angulation.

Elytral intervals: 2nd and 4th each with three raised subcostate sections, those of 4th opposite non­raised portions of 2nd; odd numbered intervals each with unilinear row of very small, widely spaced granules; lateral margin in dorsal aspect formed by granules of 8th interval (pseudoepipleuron).

Prosternum with midlongitudinal carina. Metasternum with large oval depression. Sixth ventrite weakly concave between sublateral rounded ridges.

Aedeagus length 1.04 mm; mainpiece wider at base and distally than in midlength; distal area enlarged, very complex; parameres joined near base of mainpiece, attaining proximal part of enlarged complex distal area (Fig. 52).

Females with pronotal discal foveae much deeper than those of males, center of disc distinctively humped; each elytron with prominent apical callosity; sixth ventrite transversely moderately convex, with posterior margin arcuate; last tergite posterior margin arcuate, bearing fringe of short, strong, closely spaced spines.

Etymology. Named in reference to the geographical distribution.

Distribution. Currently known only from Mount Kilimanjaro (Fig. 86).