Tetraserica allomengeana, Fabrizi, Silvia, Dalstein, Vivian & Ahrens, Dirk, 2019

Fabrizi, Silvia, Dalstein, Vivian & Ahrens, Dirk, 2019, A monograph on the genus Tetraserica from the Indochinese region (Coleoptera, Scarabaeidae, Sericini), ZooKeys 837, pp. 1-155 : 34

Tetraserica allomengeana sp. n. Figures 11, 46

Type material examined.

Holotype: ♂ "NE-Laos: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.)- 20°12'N, 104°01'E, 11.iv.-15.v.2012, 1300-1900 m leg. C. Holzschuh - ZFMK Ankauf 2012/ sp 34 Silvia" (ZFMK). Paratypes: 4 ♂♂ "NE-Laos: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.)- 20°12'N, 104°01'E, 11.iv.-15.v.2012, 1300-1900 m leg. C. Holzschuh - ZFMK Ankauf 2012" (ZFMK), 1 ♂ "NE-Laos: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.)- 20°12'N, 104°01'E, 11.iv.-15.v.2012, 1300-1900 m, leg. C. Holzschuh ZFMK Ankauf 2012/13" (ZFMK), 1 ♂ "NE-Laos: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 11.iv.-15.v.2012, 1300-1900 m, leg. C. Holzschuh - ZFMK Ankauf 2012/2013/ sp 88 Silvia" (ZFMK), 6 ♂♂ "NE-Laos: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, 1480-1510 m, Phou Pan (Mt.) 22.IV.- 14.V. 2008, Vit Kubáň leg." (ZFMK), 2 ♂♂ "NE-Laos: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, Phu Pane Mt., 1480-1510 m, 22.4.- 14.5.2008, Vit Kubáň leg." (ZFMK), 1 ♂ "Laos-NE, Houa Phan prov., 20°12-13.5'N, 103°59.5'-104°01'E, Ban Saleui- Phou Pane Mt. 1340-1870 m, 15.iv.-15.v.2008; Lao collectors leg./ 911 Sericini Asia spec. " (NHMB), 1 ♂ "Laos, 24-30.iv.1999, Louangphrabang pr., 20°33-4'N, 102°14'E, Ban Song Cha (5km W), 1200m, Vít Kubáň leg./ 202 Sericini Asia spec." (CPPB), 1 ♂ "Laos-NE, Houa Phan prov., 20°13'09-19"N, 103°59'54 ’’ - 104°00'03"E, 1480-1550 m, Phou Pane Mt., 1.-16.vi.2009, Zdeněk Kraus leg./ NHMB Basel, NMPC Prague Laos 2009 Expedition: M. Brancucci, M. Geiser, Z. Kraus, D. Hauck, V. Kubán” (NHMB).

Description.

Length of body: 8.9 mm; length of elytra: 6.6 mm; maximum width: 5.0 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes large, ratio of diameter/interocular width: 0.7. Ratio of length of metepisternum/metacoxa: 1/1.65. Metatibia moderately long and wide, ratio width/length: 1/3.36; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 11 F–H. Habitus: Fig. 11I.

Female unknown.

Variation.

Length of body: 8.1-9.1 mm; length of elytra: 5.6-6.9 mm; maximum width: 4.8-5.3 mm.

Diagnosis.

The shape of aedeagus of T. allomengeana sp. n. is very similar to that of T. mengeana Liu et al., 2014; the new species differs by the filiform branches of left paramere being approximately two thirds of the paramere length, and by having the median phallobasal lamina evenly narrowed towards apex, rather than being narrow for most of its distal part as in T. mengeana .

Etymology.

The species name (adjective in the nominative singular) is derived from the combined Greek word allo- (other) and the species name mengeana, with reference to the similarity to T. mengeana .