Tetraserica curviforceps, 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 : 25-27

Tetraserica curviforceps sp. n. Figures 6, 47

Type material examined.

Holotype: ♂ "NE-Laos: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, 1480-1510 m, Phou Pane Mt., 22.iv.- 14.v.2008, Vít Kubán leg./ sp51" (ZFMK). Paratypes: 6 ♂♂ "NE-Laos: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, 1480-1510 m, Phou Pane Mt., 22.iv.- 14.v.2008, Vít Kubáň leg." (ZFMK), 4 ♂♂, 3 ♀♀ "NE-Laos: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, 1480-1510 m, Phou Pane Mt., 22.IV.- 14.V.2008, Vít Kubáň leg." (ZFMK), 7 ♂♂ "NE-Laos: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, 1480-1510 m, Phou Pane Mt., 22.4.- 14.5.2008, Vít Kubáň leg." (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 ♂ "X-DA4511 labcode: VD031 LAOS: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 3-5.v.2013, leg. C. Holzschuh Tetraserica spLA_V17/ X-DA4511" (ZFMK), 1 ♂ "X-DA4566 labcode: VD044 LAOS: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 15-30.iv.2014, leg. C. Holzschuh - ZFMK Ankauf 2014 Tetraserica spLA_V17/ X-DA4566" (ZFMK), 1 ♂ "X-DA4570 labcode: VD045 LAOS: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 15-30.iv.2014, leg. C. Holzschuh - ZFMK Ankauf 2014 Tetraserica spLA_V17/ X-DA4570/ sp-LA-V17" (ZFMK), 1 ♂ "X-DA4577 labcode: VD047 LAOS: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 15-30.iv.2014, leg. C. Holzschuh - ZFMK Ankauf 2014 Tetraserica spLA_V17/ X-DA4577/ sp-LA-V17" (ZFMK), 1 ♂ "X-DA4583 labcode: VD050 LAOS: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 15-30.iv.2014, leg. C. Holzschuh - ZFMK Ankauf 2014 Tetraserica spLA_V17/ X-DA4583" (ZFMK), 1 ♂ "X-DA4588 labcode: VD052 LAOS: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 1.-2.v.2014, leg. C. Holzschuh - ZFMK Ankauf 2014 Tetraserica spLA_V17/ X-DA4588" (ZFMK), 1 ♂ "X-DA4593 labcode: VD055 LAOS: Houa Phan prov.; Ban Saleui, Phou Pan (Mt.) 20°12'N, 104°01'E, 6-14.iv.2014, leg. C. Holzschuh - ZFMK Ankauf 2014 Tetraserica spLA_V17/ X-DA4570/ sp-LA-V17" (ZFMK), 5 ♂♂ "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." (NHMB), 1 ♂ "Laos-NE, Houa Phan prov., 20°12-13.5'N, 103°59.5'-104°01'E, Ban Saluei- Phou Pane Mt., 1340-1870 m, 10.v.-16.vi.2009, M. Brancucci & local coll. leg./ NHMB Basel, NMPC Prague Laos 2009 Expedition: M. Brancucci, M. Geiser, Z. Kraus, D. Hauck, V. Kubáň” (NHMB).

Description.

Length of body: 6.5 mm; length of elytra: 5.4 mm; maximum width: 4.4 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes moderately large, ratio of diameter/interocular width: 0.56. Ratio of length of metepisternum/metacoxa: 1/1.52. Metatibia moderately long and wide, ratio width/length: 1/3.45; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 6 I–L. Habitus: Fig. 6M.

Female unknown.

Variation.

Length of body: 6.5-7.8 mm; length of elytra: 5.4-6.0 mm; maximum width: 4.4-4.8 mm.

Diagnosis.

Tetraserica curviforceps sp. n. differs from T. sigulianshanica Liu et al., 2014 by the distinctly finer and longer parameres. From T. doisangensis Kobayashi, 2017 it differs by the narrow median phallobasal apophysis and the strongly curved dorsal lobe of the right paramere.

Etymology.

The species name (noun in apposition) is derived from the combined Latin words curvus (curved) and forceps, with reference to the shape of the curved right paramere.