Laccobius (Glyptolaccobius) incisus Gentili, 1989

Gentili, Elio, 2006, Revisional notes on the genus Laccobius. I. Subgenus Glyptolaccobius (Coleoptera: Hydrophilidae), Acta Entomologica Musei Nationalis Pragae 46, pp. 57-76 : 65

Laccobius (Glyptolaccobius) incisus Gentili, 1989

( Figs. 4, 17-19 )

Laccobius (Glyptolaccobius) incisus Gentili, 1989: 36 . Laccobius (Glyptolaccobius) incisus: HANSEN (1999) : 130; HEBAUER (2002): 16.

Type locality. Nepal, Solukhumbu, Monjo, 2800 m a.s.l.

Type material examined. HOLOTYPE: J, 1.9 × 1.2 mm ( NSMT): ‘ Monjo , 2800 m / Solukhumbu, NEPAL / Sept. 30, 1979 / M. Sato leg. // [red label] Holotypus / E. Gentili’. PARATYPES: 11 JJ 10 ♀♀ ( NSMT, MSNV), same data as holotype.

Material not examined. NEPAL: ‘Annapurna Mts. N of Pokhara, small river near Siklis 2200 m, 24.04.1996, leg. O. Jäger ( MTDG)’. INDIA: ‘ UTTAR PRADESH, C. Almora, Dhabari ( NHML)’ (all data after HEBAUER 2002).

Differential diagnosis. Laccobius incisus belongs to the group of species with unordered elytral punctures and curved hind tibiae. Within this group it resembles L. affinis and L. egregius by the dark elytral colour without clear spots and stripes. It is chiefly distinguishable from these two species by the shape of the aedeagus ( Figs. 17-19 ), with inner margin of the parameres hooked before the apex. Externally, it differs from these species by the lack of shagreen and black hairs on head and pronotum and by the parasutural furrow reaching elytral apex.

Distribution. India (Uttar Pradesh), Nepal.

Figures

Figs. 1-4. 1-3 – Laccobius pluvialis sp. nov., paratype. 1 – habitus, ventral view; 2 – right wing; 3 – right antenna. 4 – L. incisus Gentili, 1989, paratype, habitus, dorsal view.

Figs. 5-11. 5-7 – Laccobius affinis Knisch, 1927, aedeagus. 5 – paralectotype, dorsal view; 6 – lectotype, lateral view; 7 – lectotype, ventral view. 8-11 – L. egregius Gentili, 1995, holotype. 8 – aedeagus, dorsal view; 9 – ditto, lateral view; 10 – ditto, ventral view; 11 – genital segment.