Hoplasoma andrewesi, Bezdek, 2014

Bezděk, Jan, 2014, A revision of Hoplasoma acuminatum and H. thailandicum species groups, and re-definition of H. unicolor species group (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 3794 (3), pp. 419-434 : 429-430

Hoplasoma andrewesi sp. nov.

( Figs 21 , 24, 27, 30, 33, 36 )

Type locality. “Gokteik” [Gokhteik, 22°21´00´´N 96°54´58´´ E, Shan State, Myanmar].

Type material. Holotype ♂ ( BMNH), labelled: “ Gokteik VI.10 / H. L. Andrewes [w, h] // Andrewes / Bequest. / B. M. 1922-221 [w, p]”. The holotype is provided with one additional red label: “HOLOTYPUS, / Hoplasoma / andrewesi sp. nov., / J. Bezděk det. 2013”.

Description. Body subparallel, completely orange, except tibiae, tarsi and terminal six antennomeres infuscate.

Measurements. Male: 6.0 mm (holotype).

Male (holotype, Fig. 21 ). Head lustrous. Labrum transverse, with 8 pale setae in transverse row, anterior margin slightly concave. Anterior part of head impunctate, nearly glabrous, with several long pale setae below antennal insertions. Interocular space 1.45 times as wide as transverse diameter of eye. Interantennal space narrow, 0.50 times as wide as transverse diameter of antennal socket. Frontal tubercles large, subtriangular, moderately elevated, lustrous, glabrous, impunctate. Vertex impunctate, glabrous, with group of setae along of each eye. Antennae slender with four apical antennomeres slightly widened and flattened ( Fig. 33 ), 0.80 times as long as body, length ratio of antennomeres equals 22-9-18-25 -24-23-20-18-17-15-15.

Pronotum lustrous, 1.45 times as broad as long, widest at first quarter, disc covered with sparse fine punctures, with distinctly convex anterior half, posterior half impressed. Anterior margin almost straight, unbordered. Lateral margins bordered, slightly rounded in anterior half, almost straight and moderately convergent posteriorly. Posterior margin slightly rounded, bordered. Anterior angles rectangular, posterior angles obtusangulate, all angles with setigerous pore bearing long pale seta. Several very short setae also on lateral margin behind anterior angles and on posterior margin. Scutellum impunctate, glabrous, subtriangular, with rounded apex.

Elytra dull, 2.09 times as long as wide and 0.73 times as long as body, densely covered with fine small confused punctures.

Legs. Mesotibiae strongly curved and flattened in apical quarter ( Fig. 27 ). Metatibiae laterally flattened and gradually extended in apical half. All first tarsomeres enlarged. Protarsomere 1 subtriangular, wide, 1.65 times as long as wide, distinctly wider than protarsomere 2. Length ratio of protarsomeres 1–4 equals 15-15-7-13. Metatarsomere 1 parallel-sided apically, convergent basaly, 1.15 times as long as wide, 1.62 times as wide as metatarsomere 2 in apical part. Metatarsomere 2 very long basally thin, gradually extended apically ( Fig. 36 ). Length ratio of metatarsomeres 1–4 equals 15-27-6-16. Claws bifurcate with inner branches somewhat shorter.

Ventral surface subopaque, finely punctate, covered with pale setae. Abdomen simple, disc in middle of posterior half with shallowly subtriangularly impressed, posterior margin of last ventrite widely concave with small subtriangular process in middle bent inwards ( Fig. 30 ).

Aedeagus symmetrical, parallel, in apical quarter gradually rounded, tip triangular and pointed ( Fig. 24 ).

Female unknown.

Differential diagnosis. Having similar structure of tarsi and antennae Hoplasoma andrewesi sp. nov. is very similar to H. thailandicum . Both species can be easily recognised by the shape of mesotibiae which are strongly curved in the apical two thirds in H. thailandicum while curved in the apical third in H. andrewesi sp. nov. ( Figs 26–27 ). Five apical antennomeres are wide in H. thailandicum but only slightly extended in H. andrewesi sp. nov. ( Figs 32–33 ). Aedeagus of H. andrewesi sp. nov. has the tip triangular and pointed, while apex of aedeagus of H. thailandicum is transversely cut ( Figs 23–24 ).

Distribution. Myanmar.

Etymology. Dedicated to Henry Leslie Andrewes (1873-1946), a collector of the holotype.

Figures

FIGURES 20 – 22. Habitus of Hoplasoma. 20 — H. thailandicum (male, Thailand, 6.4 mm); 21 — H. andrewesi sp. nov. (male, holotype, 6.0 mm); 22 — H. vithala sp. nov. (male, holotype, 6.7 mm).

FIGURES 23 – 37. Details of males Hoplasoma thailandicum, H. andrewesi sp. nov. and H. vithala sp. nov. 23 – 25: aedeagus (dorsal view at left, lateral view at right); 26 – 28: mesotibia; 29 – 31: last ventrite; 32 – 34: terminal antennomeres; 35 – 37: metatarsus. 23, 26, 29, 32, 35 — H. thailandicum; 24, 27, 30, 33, 36 — H. andrewesi sp. nov.; 25, 28, 31, 34, 37 — H. vithala sp. nov. Scale bars: 0.5 mm for Figs 23 – 25 and 35 – 37, 1 mm for Figs 26 – 34.