Theopea tsoui, Lee & Bezdĕk, 2019

Lee, Chi-Feng & Bezdĕk, Jan, 2019, Revision of the genus Theopea Baly (Coleoptera: Chrysomelidae: Galerucinae) in Sundaland and the Philippines: Redefinition of the genus, Zootaxa 4683 (4), pp. 451-507 : 495

Theopea tsoui sp. nov.

( Figs 19 D–19F, 23)

Types (n= 5). Holotype ♂ ( BMNH), BRUNEI. Temburong District, Kula Belalong FSC, 115°7’E 4°34’N, 8.II.1992, leg. N. Mawdsley. Paratypes. 1♂ ( BMNH), same data as holotype ; 1♀ ( BMNH), Temburong District, Kula Belalong FSC, 115°7’E 4°34’N, 19.V.1991, leg. N. Mawdsley ; 1♀ ( BMNH), same but with “ 26.VII.1991 ” ; 1♂ ( JBCB), Bru- nei Darussalam, Ulu Temburong N.P., 130 m, 4°32’49”S 115°9’25”E, 12–19.II.2015, leg. P. Kočárek.

Description. Length 8.2–8.4 mm, width 3.1–3.2 mm. General color ( Figs 19 D–19F) purplish black; antenna black except antennomeres X–XI white or pale yellow. Antennae filiform in males, except antennomeres VIII–X strongly swollen, X with a broad lateral process at middle ( Fig. 23A ), length ratios of antennomeres I–XI 1.0: 0.3: 0.7: 1.0: 1.0: 1.0: 1.3: 1.1: 1.1: 0.8: 1.1, length to width ratios of antennomeres I–XI 3.1: 1.4: 2.6: 3.3: 3.4: 2.7: 2.5: 2.3: 2.3: 2.1: 4.6; filiform in females ( Fig. 23B ), antennomeres VI–VIII slightly swollen, length ratios of antennomeres I–XI 1.0: 0.3: 0.6: 0.8: 0.8: 0.8: 0.9: 0.8: 0.8: 0.7: 1.0, length to width ratios of antennomeres I–XI 3.3: 1.6: 2.6: 3.2: 3.0: 2.6: 3.0: 2.8: 3.1: 3.3: 4.6. Elytra elongate and parallel-sided, 1.8x longer than wide; disc with reduced reticulate microsculpture, dense, coarse punctures, arranged into longitudinal rows, with one weak longitudinal ridge between two longitudinal rows of punctures, ridges near suture abbreviated. Tarsomeres I of front legs swollen in males; subparallel in females. Aedeagus ( Figs 23 C–23E) slender, 8.4x longer than wide; parallel-sided, but narrowed at middle; apically narrowed, apex with median shallow, narrow notch, apices narrowly rounded; tectum well sclerotized, as wide as aedeagus, very long, about 0.5x as long as aedeagus, apex broadly rounded; straight from apex to middle in lateral view, and then slightly curved, apex narrowly rounded; ventral surface with deep notch from apex to middle, mesally extending and approximate at apical 1/10; triangular sclerites small; internal sac with one median, elongate sclerite, as wide as aedeagus but basally narrowed, with one pair of small hook-like sclerites near apex, with one pair of large apically tapering sclerites near base. Gonocoxae ( Fig. 23G ) elongate, widest at apical 1/7, both gonocoxae combined together from basal 1/5 to apical 1/7; apices narrowly rounded, each gonocoxa with eight setae along outer margin from apex to apical 1/6; with one pair of short lateral processes at basal 2/5. Ventrite VIII ( Fig. 23F ) elongate and well sclerotized; disc with several long setae laterally and near apical margin, and with dense, short setae along apical margin; spiculum extremely slender. Receptacle of spermatheca ( Fig. 23H ) strongly swollen; pump slender and strongly curved; proximal spermathecal duct deeply inserted into receptacle, narrow and short.

Diagnosis. Specimens of T. tsoui sp. nov. are similar to those of T. kedenburgi with only two apical white antennomeres, lateral expansion only on antennomere X in males, and reduced ridges near suture on the elytra, but they differ from those of T. kedenburgi by the strongly swollen antennomeres VIII–X in males (moderately swollen in T. kedenburgi ). Females of T. tsoui possess slightly swollen antennomeres VI–VIII (no swollen antennomeres in females of T. kedenburgi ). The aedeagi of males of T. tsoui sp. nov can be separated from those of T. kedenburgi by the elongate tectum, 0.5x as long as aedeagus (short tectum in T. kedenburgi , 0.2x as long as aedeagus), and medially narrowed aedeagus (parallel-sided aedeagus in T. kedenburgi ).

Etymology. This new species is named after Mr. Mei-Hua Tsou, a member of TCRT for his contribution to diversity of leaf beetles.

Distribution. Brunei.

Figures

FIGURE 19. Habitus of Theopea kedenburgi Weise and T. tsoui sp. nov. 19A. T. kedenburgi, male, dorsal view; 19B. T. keden- burgi, male, dorsal view, color variation; 19C. T. kedenburgi, male, dorsal view, color variation; 19D. T. tsoui sp. nov., male, dorsal view; 19E. Same, ventral view; 19F. T. tsoui sp. nov., female, dorsal view.

FIGURE 23. Diagnostic characters of Theopea tsoui sp. nov. 23A. Antenna, male; 23B. Antenna, female; 23C. Aedeagus, dorsal view; 23D. Aedeagus, lateral view; 23E. Aedeagus, ventral view; 23F. Abdominal ventrite VIII; 23G. Gonocoxae; 23H. Spermatheca.