Dere shavrini, Barševskis & Saulīte, 2020

Barševskis, Arvīds & Saulīte, Daiga, 2020, Five new species of the genus Dere Fahraeus, 1872 (Coleoptera: Cerambycidae) from the Philippines, Baltic Journal of Coleopterology 20 (2), pp. 211-219 : 213-214

Dere shavrini sp. nov.

( Fig. 3)

Type material. HOLOTYPUS, male: Philippines / Palawan isl., Roxas , 08. 2020 / local collector leg. [printed white label] . HOLOTYPUS: / Dere / shavrini sp. nov. / A.Barševskis, D. Saulīte descr. 2020 [red handwritten label] ( DUBC) .

PARATYPUS, female: Philippines / Palawan isl., Roxas, 08. 2020 / local collector leg. [printed white label]; ex Prof. A.Barševskis coll. [printed white label] . PARATYPUS: / Dere / shavrini sp. nov. / A.Barševskis, D. Saulīte descr. 2020 [red handwritten label] ( DUBC) .

General distribution: Palawan Isl., Philippines.

Description. Body black, elongated, narrow, dorsal surface of elytra flattened, with coarse and dense punctation, wrinkles and metallic reflection. Length: 6.8 - 6.9 mm, maximal width: 1.7 – 2.0 mm; length/width ratio: 3.3 – 3.5.

Head flattened, with square frontal part and convex, bilobate eyes. Dorsal surface of head with coarse punctation and with short, impressed longitudinal line between extended antennal bases. Labrum dark-brown, slightly pubescent, shiny. Clypeus dark-brown, transverse, shiny. Mandibles brown, with darker apex, sharp, Elytra almost parallel-sided, black, from middle slightly widened apically, flattened, with indistinctly raised shoulders hump. Elytra shiny, with metallic reflection. Punctation very dense, not arranged in longitudinal rows. Apical margin of elytra with two sharp extensions: smaller on apical edge near suture and largest and very sharp latero-apical extension.

Ventral surface of body laterally covered with grey pubescence. Legs black, covered with very fine pubescence, inner margin of tibia with dense silver pubescence, with small oval spot of silver-grey pubescence near apex.

Differential diagnosis. Regarding the shape of the body, the new species is similar to D. telnovi sp. n., but differs from it by unicoloured body, smaller size (<7.0 mm, while D. telnovi sp. nov. > 7.7 mm), different length/width ratio (3.3–3.5, while D. telnovi sp. nov. is 4.1-4.8). Lateral extensions on apical margins of elytra of new species longer than that in D. telnovi sp. nov.

massive, wide, shiny, relatively short, with sparse short pubescence on lateral portions. Cheeks with very sparse, short, dark pubescence. Antennae slender. Male antennae slightly shorter than body, not reaching apex of elytra. Female antennae shorter, reaching slightly behind middle of elytra. Antennomeres covered with coarse punctation and fine, sparse pubescence; antennomeres 1–5 thickened apically, black.

Pronotum black, cylindrical, elongated, slightly narrowed in apical and basal portions. Surface with very dense and coarse punctures and short wrinkles.

Scutellum small, with slightly rounded apex. Pars stridens almost completely covered with pronotum.

Etymology. This species is named after my friend and colleague Dr. Alexey Shavrin (Daugavpils, Latvia) in appreciation of cooperation, and in gratitude for his contributions to the knowledge of Staphylinidae .