Borneotheopea kalimantanensis, Lee & Bezděk, 2020

Lee, Chi-Feng & Bezdek, Jan, 2020, Revision of the Theopea genus group (Coleoptera, Chrysomelidae, Galerucinae), part III: Descriptions of two new genera and nine new species, ZooKeys 912, pp. 65-124 : 65

Borneotheopea kalimantanensis sp. nov. Figs 26D-F ; 28

Types.

Holotype ♂ (NMPC), INDONESIA. South Kalimantan: Kandagan distr., 17 km NE of Laksado vill., 900 m, 3-22.IX.1997, leg. S. Jákl. Paratypes. 11♂♂ (JBCB), same data as holotype; MALAYSIA. Sabah: 2♂♂ (TARI), Trusmadi, 1.X.2014, leg. Y.-T. Wang; 2♂♂ (TARI), same but with “2.X.2014”.

Description.

Length 5.1-5.8 mm, width 1.8-2.3 mm. Body color (Fig. 26D-F ) yellowish brown, head and pronotum metallic green, prosternite dark brown, elytra yellowish but laterally and apically metallic green, antenna black except three basal antennomeres paler. Antennae filiform in males (Fig. 28A ), length ratios of antennomeres I-XI 1.0: 0.3: 0.8: 0.9: 0.8: 0.8: 0.8: 0.8: 0.8: 0.7: 0.8, length to width ratios of antennomeres I-XI 3.9: 1.8: 3.4: 4.4: 5.2: 5.3: 5.9: 5.8: 5.6: 4.6: 4.6. Elytra elongate, parallel-sided, 1.9-2.0 × longer than wide; disc with dense, coarse punctures, arranged into longitudinal rows, with one indistinct longitudinal ridge between two longitudinal rows of punctures, with dense, short setae along ridges. Tarsomeres I of front legs slightly swollen in males. Aedeagus (Fig. 28B-D ) slender, 4.7 × longer than wide; widest at basal 2/5, narrowed towards apical 1/7 and basal 1/5, parallel from apical 1/7 to apex, apical margin truncate, slightly depressed medially; tectum extremely slender, from apical 1/5 to basal 1/4; recurved in lateral view, angular at apical 1/6, straight from apical 1/6 to apex; ventral surface entirely sclerotized, triangular sclerites absent; internal sac with elongate endophallic sclerite, 0.9 × as long as aedeagus, apex with one pair of small processes directed ventrally, one pair of longitudinal rows of hair-like setae basally connected with apex of endophallic sclerite, one pair of lateral sclerites large and hook-like, subequal in length but with different apical shapes; basal opening medially closed.

Female unknown.

Variation. Specimens from Sabah have slender lateral sclerites of the internal sac (Fig. 28E ).

Diagnosis.

Borneotheopea kalimantanensis sp. nov. is easily distinguished from the other member of the genus, B. jakli sp. nov., based on the distinct ridges on the elytra and yellowish brown ventral surface (Fig. 26E, F ) (indistinct ridges on the elytra and metallic blue ventral surface in B. jakli sp. nov. (Fig. 26A-D ). Males of B. kalimantanensis sp. nov. are also easily separated from those of B. jakli sp. nov. by the anterior directed apex and angular process at apical 1/6 of the aedeagus (Fig. 28C ) (the apex of aedeagus directed ventrally and without angular processes in B. jakli sp. nov. (Fig. 27D )), extremely slender tectum (Fig. 28B ) (short and wide tectum in B. jakli sp. nov. (Fig. 27C )), presence of clustered setae at apex of median elongate sclerite (Fig. 28B, C ) (without setae at apex of median elongate sclerite in B. jakli sp. nov. (Fig. 27C-E )).

Etymology.

The new species is named for its type locality.

Distribution.

Indonesia: South Kalimantan; Malaysia: Sabah.

Figures

Figure 26. Habitus of Borneotheopea jakli sp. nov. and B. kalimantanensis sp. nov. A B. jakli sp. nov., male, dorsal view B Same, ventral view C B. jakli sp. nov., female, dorsal view D B. jakli sp. nov., male, color variation, dorsal view E B. kalimantanensis sp. nov., male, dorsal view F Same, ventral view.

Figure 27. Diagnostic characters of Borneotheopea jakli sp. nov. A Antenna, male B Antenna, female C Aedeagus, dorsal view D Aedeagus, lateral view E Aedeagus, ventral view F Abdominal ventrite VIII G Gonocoxae H Spermatheca.

Figure 28. Diagnostic characters of Borneotheopea kalimantanensis sp. nov. A Antenna, male B Aedeagus, dorsal view C Aedeagus, lateral view D Aedeagus, ventral view E Aedeagus, dorsal view, from Sabah.