Cyrtonion sculpticolle ( Régimbart, 1907 )

Fikáček, Martin, 2008, A new species of the genus Cyrtonion (Coleoptera: Hydrophilidae: Megasternini) from the Democratic Republic of the Congo, Acta Entomologica Musei Nationalis Pragae (suppl.) 48 (1), pp. 27-35 : 32

Cyrtonion sculpticolle ( Régimbart, 1907)

( Figs. 4 , 6 )

Cryptopleurum sculpticolle Régimbart, 1907: 61 .

Pachysternum sculpticolle : BALFOUR- BROWNE (1958): generic placement revised; HANSEN (1999): catalogue; HEBAUER (2006): catalogue.

Cyrtonion sculpticolle: FIKÁČEK (2006) : generic placement revised.

Type material examined. PARATYPE: ♁, ‘Is. Fernando Poo [= Equtorial Guinea, Bioko island] / Basile [= Pico Basilé Mt. env.] / 400- 600 m.s.m. / VIII-IX. 1901 / L. Fea // sculpticolle // Cotype // Coll.A. d’Orchymont // Cryptopleurum / sculpticolle / Rég. / d’Gestro det. 1921 // paratype’ ( IRSN).

Differential diagnosis. The species is externally identical with C. ghanense and C. moto sp. nov. From the latter species, it differs by pointed apex of the median lobe. From C. ghanense , it can be distinguished by narrower median lobe with concave lateral sides on its apical part ( Fig. 4 ).

Variation. Unknown.

Distribution. This species is so far known only from the type series collected on Bioko Island ( Fig. 6 ). HANSEN (1999) mentioned it also for Guinea, referring to the paper by BALFOUR-BROWNE (1958) concerning the hydrophiloid fauna of Mt. Nimba Reserve. However, there are no data referring to Guinea in the latter paper. I have found only two specimens from the Democratic Republic of the Congo identified as Pachysternum sculpticolle by J. Balfour-Browne in 1953 in the collection of MRAC. These specimens belong to C. moto sp. nov. described above.

Figures

Figs. 1-4. Aedeagophores of Cyrtonion Hansen, 1989 species. 1-2 – C. moto sp. nov., holotype; 3 – C. ghanense Hansen, 1989, paratype; 4 – C. sculpticolle (Régimbart, 1907), paratype. 1 – aedeagus; 2-4 – apical portion of the median lobe.

Fig. 6. Known distribution of the species of the genus Cyrtonion Hansen, 1989. Green area covers distribution of evergreen rain forest.