Tetraserica spanglerorum, 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 : 86

Tetraserica spanglerorum sp. n. Figures 37, 51

Type material examined.

Holotype: ♂ "THAILAND: Nkn. Ratcha. Prov. Nakhon Ratchasima 60 km S. 2-4 Mar 1971, P & P Spangler/ Sakaerat Expt. Sta. 14°30'N, 101°55'E, 300-600 meters/ collected at white light trap/ 910 Sericini Asia spec." (USNM). Paratypes: 11 ♂♂, 4 ♀♀ "THAILAND: Nkn. Ratcha. Prov. Nakhon Ratchasima 60 km S., 2-4 Mar 1971, P & P Spangler/ Sakaerat Expt. Sta. 14°30'N, 101°55'E, 300-600 meters/ collected at white light trap" (USNM, ZFMK).

Description.

Length of body: 7.8 mm; length of elytra: 6.3 mm; maximum width: 5.4 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: 0.54. Ratio of length of metepisternum/metacoxa: 1/1.88. Metatibia short and wide, ratio width/length: 1/3.14; basal group of dorsal spines of metatibia at first third of metatibial length.

Aedeagus: Fig. 37 J–L. Habitus: Fig. 37M.

Variation.

Length of body: 7.7-7.8 mm; length of elytra: 5.7-6.3 mm; maximum width: 5.2-5.4 mm. Female: Antennal club with three antennomeres, as long as remaining antennomeres combined; eyes as large as in male; pygidium flat.

Diagnosis.

The shape of the aedeagus in Tetraserica spanglerorum sp. n. is similar to that of T. loeiensis sp. n.; T. spanglerorum sp. n. differs by the dorsal lobe of left paramere being distinctly wider than the ventral one and slightly curved (dorsal view); also its right paramere is bent in a nearly sharp angle at the middle.

Etymology.

The new species is named after its collectors, P & P Spangler (noun in genitive case, plural).