Gonioctena (Asiphytodecta) mausonensis Cho & Borowiec, 2016

(Figs 4, 9, 25–26, 29)

Gonioctena (Asiphytodecta) flavoplagiata (partim): YANG et al. (2014): 384 (taxonomy, misidentification); YANG et al. (2015): 54 (catalogue, misidentification).

Gonioctena (Asiphytodecta) mausonensis Cho & Borowiec, 2016: 169 (original description).

Type locality. Vietnam, Lang Son Province, Loc Binh, Mt. Mau Son.

Type material examined. HOLOTYPE: ♂, ‘ Tonkin, Montes Mauson,April, Mai 2-3000’, H. Fruhstorfer // 24 // Jacoby Coll.1909-28a. // flavoplagiata Jac. // HOLOTYPUS Gonioctena (Asiphy.) mausonensis sp. n. Cho & Borowiec 2014’ (BMNH). PARATYPE: 1 ♂, ‘ Tonkin, Montes Mauson,April, Mai 2-3000′, H. Fruhstorfer // PARATYPUS Gonioctena (Asiphy.) mausonensis sp. n. Cho & Borowiec 2014’ (LMCM).

Description. See CHO & BOROWIEC (2016).

Differential diagnosis. Gonioctena (A.) mausonensis can be easily distinguished from G. (A.) eburoides, G. (A.) flavoplagiata, G. (A.) jindrai sp. nov. and G. (A.) truncaticornis sp. nov. by its reddish-brown venter and subdiamond-shaped apical process of aedeagus (Fig. 26).

Distribution. Vietnam: Lang Son (Fig. 29).

Remarks. The male genitalia of Gonioctena (A.) flavoplagiata illustrated by YANG et al. (2014) without any doubts refer to G. (A.) mausonensis . The correct drawings of male genitalia of G. (A.) flavoplagiata were provided by CHO & BOROWIEC (2016).