Tetraserica filiforceps, 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 : 84-86

Tetraserica filiforceps sp. n. Figures 37, 48

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 Pan (Mt.) 22.IV.-14.V.2008, Vit Kubáň leg." (ZFMK). Paratypes: 3 ♂♂ "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, 1480-1510 m, Phou Pan (Mt.) 22.iv.- 14.v. 2008, Vit Kubáň leg." (ZFMK), 1 ♂ " Laos-NE: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, 1480-1510 m, Phou Pan (Mt.), 22.4.-14.5. 2008, Kubáň” (ZFMK), 3 ♂♂ "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), 2 ♂♂ "NE-Laos: Houa Phan prov., 20°13'09-19"N, 103°59'54"-104°00'03"E, Phu Pane Mt., 1480-1510 m, 17.5.-3.6.2007, Vit Kubáň leg." (ZFMK), 1 ♂ "N-Vietnam (Tonkin) pr. Vinh Phu 1990 Tam Dao 17.-21.V. leg. P. Pacholátko / coll. P. Pacholátko / VS81/ 236 Sericini Asia spec." (CPPB), 1 ♂ "X-DA4581/ X-DA4581 labcode: VD 048 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_V21/ sp-LA-V21" (ZFMK), 1 ♂ " Laos: Houa Phan Prov.; Ban Saleui, Phou Pan (Mt.) - 20°12'N, 104°01'E, 11.iv.-15.v.2012 leg. C. Holzschuh ZFMK Ankauf 2012/13" (ZFMK), 1 ♂ "Sapa 11-18.6. N. Vietnam A. Olexa 1990" (NHMB), 1 ♂ "Vietnam N 1990 SaPa 11-19.VI. 1500 m Hoang Lien Son Prov. Strnad Jan lgt." (NHMB), 1 ♂ "Vietnam N (Sa Pa) Lao Cai Prov., 250 km from Hanoi bearin 31°, Sa Pa vill. Env. Hoang Lien Son Nat. Res., 27.5.-3.6.1998 1250 m leg. A. Naplolov" (CNAR), 1 ♂ "LAOS-NE, Houa Phan prov., 20°11-13'N, 103°59-104°01'E, Ban Saluei-> Phou Pane Mt., 9.-17.vi.2009, 1300-1900 m, Michael Geiser leg./ NHMB Basel, NMPC Prague, Laos 2009, Expedition: M. Brancucci, M. Geiser, Z. Kraus, D. Hauck, V. Kubáň / 914 Sericini Asia spec." (NHMB), 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. Kubáň / 914 Sericini Asia spec." (NHMB), 1 ♂ "LAOS-NE, Xieng Khouang prov., 19°37-8'N, 103°20-1'E, 30 km NE Phonsavan Ban Na Lam -> Phou Sane Mt., 1300-1700 m, 10-30.v.2009, M. Geiser leg./ NHMB Basel, NMPC Prague, Laos 2009, Expedition: M. Brancucci, M. Geiser, Z. Kraus, D. Hauck, V. Kubáň / 914 Sericini Asia spec." (NHMB), 2 ♂♂ "Vietnam N (Sa Pa) Lao Cai Prov., 250 km from Hanoi bearin 31°, Sa Pa vill. Env. Hoang Lien Son Nat. Res., 25.VI.-5.VII.1998 1250 m leg. A. Naplolov" (CNAR).

Description.

Length of body: 9.1 mm; length of elytra: 6.6 mm; maximum width: 5 mm. Surface of labroclypeus and disc of frons glabrous. Smooth area anterior to eye twice as wide as long. Eyes small, ratio of diameter/interocular width: 0.53. Ratio of length of metepisternum/metacoxa: 1/1.43. Metatibia moderately long and wide, ratio width/length: 1/3.58; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 37 E–H. Habitus: Fig. 37I.

Female unknown.

Variation.

Length of body: 9.1-9.2 mm; length of elytra: 6.6-7.1 mm; maximum width: 5.0-5.9 mm.

Diagnosis.

Tetraserica filiforceps sp. n. differs from the very similar T. satura (Brenske, 1898) by the left paramere, which is slightly shorter than phallobase, and the right paramere which is nearly straight (lateral view).

Etymology.

The name of the new species (noun in apposition) is derived from the combined Latin words filum (string/ filament) and forceps, with reference to the filiform parameres.