Eupotemus taianus, Fikáček & Matsumoto & Perkins & Prokin & Sazhnev & Litovkin & Jäch, 2021

Fikáček, Martin, Matsumoto, Keita, Perkins, Philip, Prokin, Alexander, Sazhnev, Alexey, Litovkin, Stanislav & Jäch, Manfred A., 2021, The family Epimetopidae (Coleoptera: Hydrophiloidea): review of current knowledge, genus-level phylogeny, and taxonomic revision of Eupotemus, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 61 (1), pp. 1-34 : 22-24

Eupotemus taianus sp. nov.

( Figs 11D–F , 12G–I )

Material examined. Hඈඅඈඍඒඉൾ: J (DNA voucher MF2248) ( BMNH): ʽCÔTE D’IVOIRE, 174m, / Taï NP, Taï Research Station / ( SRET) / 05°50’00”N 07°20’32.0”W, / 25.III-17.IV. 2017, MV light // Aristophanous,A., / Aristophanous, M., / Geiser, M., Moretto, P., leg., / BMNH(E) 2019-93ʼ.

Differential diagnosis. Very similar to the other species of the E. carinaticollis species group from which it can

be reliably distinguished by the male genitalia only. The aedeagus resembles that of E. carinaticollis by the subapically constricted and apically widened parameres but differs in the wider median lobe with convex sides subapically. From E. uluguru it differs in the apically widened parameres.

Description. Body 2.8 mm long and 1.5 mm wide. Dorsal surface black. Habitus and sculpture as in Figs 12G–I ; ridge on elytral interval 3 complete throughout; ridge on interval 5 interrupted posteriorly; ridge on interval 7 interrupted in posterior fourth. Elytral punctures connected by low elevated line. Aedeagus (11D–F): 0.90 mm long. Parameres ca. 2.0× longer than phallobase, indistinctly constricted at midlength, strongly constricted subapically, apex widened. Median lobe 2.5× longer than wide, narrowing from midlength to apex, sides convex subapically. Phallobase basally with narrow symmetrical manubrium.

Etylomogy. The species name refers to the Taï National Park in which the only known specimen of this species was collected. Adjective.

Biology. Unknown, collected at light.

Distribution. Known only from the type locality in southwestern Côte d’Ivoire ( Fig. 13B ).

Figures

Fig. 11. Male genitalia of the Eupotemus carinaticollis species group, holotypes.A–C – E. carinaticollis (Basilewsky, 1956); D–F – E. taianus sp. nov.; G–I – E. uluguru sp. nov. A, D, G – dorsal view; B, E, H – lateral view; C, F, I – ventral view.

Fig. 12. Habitus photographs of the species of the Eupotemus carinaticollis species group, holotypes: A–C – E. carinaticollis (Basilewsky, 1956); D–F – E. uluguru sp. nov.; G–I – E. taianus sp. nov.

Fig. 13. Known distribution of Eupotemus species.A – species of E. limicola species group; B – species of E. carinaticollis species group.