Guilielmia monticola Weise, 1924

D’Alessandro, Paola, 2017, Guilielmia Weise, a little known Afrotropical flea beetle genus: systematic affinities and description of a second new species from Central Africa (Coleoptera, Chrysomelidae, Galerucinae, Alticini), Zootaxa 4323 (4), pp. 572-578 : 576-577

Guilielmia monticola Weise

( Figs 2 , 4, 6–7, 9 )

Guilielmia monticola Weise, 1924: 24 ; Biondi & D’Alessandro, 2012: 86, Fig. 46.

Types examined. Type ♀: UGANDA-RWANDA-DEMOCRATIC REPUBLIC OF CONGO, “ Birunga, Mount Mukeno [= Volcan Mikeno : 01°27'47''S, 29°25'06''E], 3100 m ” ( NHRS) .

Additional material examined. UGANDA-RWANDA-DEMOCRATIC REPUBLIC OF CONGO: Volcan Karisimbi [01°30'29''S, 29°27'00''E], Rukumi , 3500–3700 m, 9–18.Vii.1970, “prairie, Fauchage ”, R.P.M. Lejeune leg., 1 ♂ ( RMCA) ; ditto, Forêt de Hagenia , 3300–3500 m, 23.vii–1.viii.1970, “humus”, 1 ♂ ( RMCA) .

Taxonomic remarks. We attributed the two males aboVe to Guilielmia monticola for the presence of a weak antebasal transVerse pronotal depression (reported by Weise (1924) in the original description of the species), Visible in lateral View, and the close proximity of the collecting localities to that of the holotype. Median lobe of aedeagus ( Fig. 9 ) slightly fusiform laterally in Ventral View, apically obtuse, with a short rounded median tooth; slightly and regularly curVed in lateral View, with a Ventrally bent apex; dorsal ligula extending for about half the length of aedeagus, and formed by one main central sclerified lobe narrowing apically, and two lateral lobes elongate apically. The only known female of G. monticola , the holotype, is a Very immature female, so its spermatheca is undetectable (cf. Biondi & D’Alessandro 2012, Fig. 46).

Biometry. Male (n = 2): LE = 2.01, 2.05 mm; WE = 1.58, 1.63 mm; LP = 0.74, 0.76 mm; WP = 1.11, 1.18 mm; LAN = 1.78, 1.85 mm; LAED = 1.18, 1.21 mm; LB = 2.73, 2.88 mm; LE/LP = 2.73, 2.69; WE/WP = 1.42, 1.38; WP/LP = 1.51, 1.54; WE/LE = 0.78, 0.79; LAN /LB = 0.65, 0.64; LE/ LAED = 1.71, 1.69.

Distribution. Mountain area (Birunga, Volcan Mikeno and Volcan Karisimbi) between Uganda, Rwanda and Democratic Republic of Congo (KiVu Sud). Chorotype: Central Afrotropical (CAT).

Figures

FIGURES 1 – 2. Habitus of Guilielmia Weise. 1) Guilielmia leleupi sp. nov., holotype, male. 2) G. monticola, male.

FIGURES 3 – 9. 3) Head in frontal view of Guilielmia leleupi sp. nov. fg: frontal groove; td: transversal depression. 4) Ditto of G. monticola. 5) Pronotum and head in dorsal view of G. leleupi sp. nov. cp: coarse punctation; td: transversal depression. 6) Ditto of G. monticola. od: oblique depression. 7) Metafemoral extensor tendon of G. monticola. ba: basal angle of the ventral lobe; dl: dorsal lobe; ea: extended arm of the dorsal lobe; rf: recurve flange; vl: ventral lobe. 8) Aedeagus in ventral (v), dorsal (d), and lateral (l) view of G. leleupi sp. nov. 9) Ditto of G. monticola.