Gnathoncus vietnamicus Kryzhanovskij, 1972

Lackner, Tomáš, 2020, A review of Gnathoncus of Southeast Asia (Coleoptera: Histeridae: Saprininae), Acta Entomologica Musei Nationalis Pragae 60 (1), pp. 397-409 : 408

Gnathoncus vietnamicus Kryzhanovskij, 1972

( Fig. 57 )

Gnathoncus vietnamicus Kryzhanovskij, 1972: 22 , figs 4 A–C (original description).

Gnathoncus vietnamicus : MΑƵUR (1984): 103 (catalogue); MΑƵUR (1997): 215 (catalogue); MΑƵUR (2011): 177 (catalogue); MΑƵUR +| ÔΗΑRΑ (2003): 2, 4, figs 1 A–F, 2 A–F, 3 A,B (key, redescription).

Type locality. North Vietnam: Hoa Binh.

Type specimens examined. None.

Additional specimens examined. THAILAND: MΑε HΟΝǤ SΟΝ: 4.–6.v.1991, Ban Si Lang, 1200 m, 1 ♀, J. Horák lgt. ( CTLA).

Note. This species was thoroughly re-described and figured in detail by MΑƵUR +| ÔΗΑRΑ (2003: 4) and the reader is referred to that. Unfortunately, no male specimen has been reported hitherto. For the sake of better recognition of this species among others occurring in SE Asia the habitus ( Fig. 57 ) is depicted herein.

Differential diagnosis. The widely interrupted sutural elytral stria (present merely as a short basal fragment and longer fragment on elytral apical half) distinguishes this species from all other SE Asian congeners.

Biology. No biological data are available for this species.

Distribution. Known so far only from Vietnam and Thailand (MΑƵUR 2011).

Figures

Figs 56–57.Habitus of SEAsian Gnathoncus species. 56 – G. semimarginatus Bickhardt, 1920, dorsal habitus; 57 – G. vietnamicus Kryzhanovskij, 1972, dorsal habitus. 58 – G. brevisternus Lewis, 1907, anterolateral view showing marginal pronotal stria; 59 – G. semimarginatus, the same.