Clada (Clada) obesa, Zahradnik, Petr & ryzna, Milos, 2018

Zahradnik, Petr & ryzna, Milos, 2018, Nine new species of Clada from Madagascar (Coleoptera, Ptinidae), ZooKeys 806, pp. 121-140 : 121

Clada (Clada) obesa sp. n. Figs 8, 17, 26

Type material.

Holotype female: Madagascar, Mahajanga prov., Ampatika env., Mahajamba riv., 10.-12.xii.1996, I. Jeniš lgt. (FGMRI).

Differential diagnosis.

Differs from other African species by the shape of the body, which is very arched. For differences from other Madagascan species, see key.

Description.

Female (holotype). Short, elongate-elliptical, extremely strongly transversally convex (any other species from genus Clada Pascoe, 1887 is not so convex). Body length 8.0 mm, maximum width 4.4 mm (Figure 8). Ratio length:width of elytra 1.6. Body dark brown, pronotum piceous-black, legs dark brown, antennae and maxillary and labial palpi lighter, brown. Pubescence yellowish white.

Head matt; dense, coarse, umbilicate punctation, with long recumbent or semi-erect dense pubescence, with sparse long erect setae, inclined more or less forwards, only on vertex partly inclined to middle or backwards. Clypeus with deep transversal furrow, frons flattened. Eyes large, globular with short erect sparse brown pubescence. Frons wide, 2.9 times as wide as diameter of eye (from dorsal view). Antennae consisting of eleven antennomeres, serrate (Figure 26). 1st antennomere robust, twice as long as wide, with dense long erect hairs; 2nd small, as wide as 1st, only one-half of their length, as long as wide. 3rd slightly serrate, 1.5 times as long as wide. Antennomeres 4th to 10th serrate; 4th 1.1 times as long as wide, 5th 1.5 times as long as wide; 6th 1.3 times as long as wide, 7th to 10th 1.6 times as long as wide, 11th oblong oval, 2.6 times as long as wide. Apical maxillary palpomere long, spindle shaped.

Pronotum convex, matt shining, transverse (ratio length:width of pronotum 0.7), widest in last third. Base of pronotum finely bordered. Middle of pronotum at base with high blunt swelling, on their sides shallow, almost invisible rounded depression. Surface of pronotum coarsely, densely, umbilicate punctate, distance between punctures smaller than their diameter, almost touching. Pubescence short, recumbent or semi-erect, inclined largely backwards, on sides inclined obliquely backward, on anterior margin inclined from sides to middle; from anterior margin to swelling in middle arranged to narrow strip.

Scutellum large, almost triangular (on top slightly rounded), 1.2 times as long as wide. Surface distinct with dense and coarse umbilicate punctation, with short, dense, recumbent pubescence inclined backwards.

Elytra short oval, transversally strongly convex, shining, with distinct humeri. Each elytron slightly irregular bent, with fifth costae, which are only slightly visible (especially from lateral view). Surface of elytra with double punctation. One very coarse, dense, umbilicate, irregular, diameter between punctures smaller than their diameter. Other one relatively fine, dense; punctures almost touching. Pubescence short, sparse, inclined backwards.

Legs stout, with short and dense recumbent pubescence. All tarsi robust, same length as tibia. 1st metatarsomere as long as 2nd and 3rd together, same width, slightly emarginate on top, 4th slightly shorter than previous, more emarginate, almost to 2/3 of their length. 5th is same length as 3rd and 4th together, rectangular, wider on the top, with two large claws, without teeth.

Male. Unknown.

Name derivation.

Derived from the shape of body, from the Latin obesus for plump.

Biology.

Unknown.

Distribution.

This species is found in the northwestern part of Madagascar (Figure 17).