Borneotheopea jakli, 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 jakli sp. nov. Figs 26A-C ; 27

Types.

Holotype ♂ (NMPC), INDONESIA. South Kalimantan: Kandagan distr., 17 km NE of Laksado vill., 900 m, 3-22.IX.1997, leg. S. Jákl. Paratypes. 16♂♂, 2♀♀ (JBCB), same data as holotype.

Description.

Length 4.6-5.0 mm, width 1.7-1.8 mm. Body color (Fig. 26A-C ) metallic blue or green; ventral part, mouth parts, and antennae dark brown to black. Antennae filiform in males (Fig. 27A ), length ratios of antennomeres I-XI 1.0: 0.3: 0.6: 0.7: 0.7: 0.7: 0.7: 0.7: 0.7: 0.6: 0.7, length to width ratios of antennomeres I-XI 4.0: 1.9: 3.4: 4.5: 4.6: 4.3: 4.7: 4.6: 4.8: 4.6: 4.5; similar in females (Fig. 27B ), length ratios of antennomeres I-XI 1.0: 0.3: 0.6: 0.9: 0.9: 0.8: 0.8: 0.8: 0.8: 0.7: 0.8, length to width ratios of antennomeres I-XI 3.2: 1.8: 2.8: 4.2: 4.5: 4.3: 4.3: 4.6: 5.0: 5.1: 5.2. Elytra elongate, parallel-sided, 1.8-2.0 × 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. 27C-E ) slender, 5.5 × longer than wide, parallel from apical 1/3 to near base, narrowed towards apex, apical margin medially depressed; tectum short, from near apex to middle; almost straight in lateral view, apically curved; ventral surface entirely sclerotized, triangular sclerites absent; internal sac with elongate endophallic sclerite, 0.8 × as long as aedeagus, one pair of lateral sclerites elongate and hook-like, strongly recurved basally, left sclerite much longer than right sclerite. Gonocoxae (Fig. 27G ) elongate, both gonocoxae fused from basal 1/3 to apical 1/3; apices convergent and narrowly rounded, each gonocoxa with eight setae along lateral margin from apex to apical 1/6; with one pair of short lateral processes at basal 2/5. Ventrite VIII (Fig. 27F ) elongate and well sclerotized; disc with several long setae at sides and near apical margin, and with dense, short setae along apical margin; spiculum extremely slender. Receptacle of spermatheca (Fig. 27H ) strongly swollen; pump slender and strongly curved; proximal spermathecal duct deeply inserted into receptacle, elongate and narrow.

Diagnosis.

Borneotheopea jakli sp. nov. is easily distinguished from the other member of the genus, B. kalimantanensis sp. nov., based on the indistinct ridges on the elytra and metallic blue ventral surface (Fig. 26A-D ) (distinct ridges on the elytra and yellowish brown ventral surface in B. kalimantanensis sp. nov. (Fig. 26E, F )). Males of B. jakli sp. nov. are also easily separated from those of B. kalimantanensis sp. nov. by the aedeagal apex directed ventrally and lacking angular processes (Fig. 27D ) (the apex directed anteriorly and with angular process at apical 1/6 of aedeagus in B. kalimantanensis sp. nov. (Fig. 28C )), short, broad tectum (Fig. 27C ) (extremely slender tectum in B. kalimantanensis sp. nov. (Fig. 28B )), absence of setae at apex of median elongate sclerite (Fig. 27C-E ) (presence of clustered setae at apex of median elongate sclerite in B. kalimantanensis sp. nov. (Fig. 28B, C )).

Etymology.

The new species is dedicated to the Czech specialist Stanislav Jákl who collected the type specimens.

Distribution.

Indonesia: South Kalimantan.

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.