Pyrrhalta kambaitiensis, Bezděk & Lee, 2019

Bezděk, Jan & Lee, Chi-Feng, 2019, Revision of Pyrrhalta (Coleoptera: Chrysomelidae: Galerucinae) species with maculate elytra, Zootaxa 4664 (1), pp. 518-534 : 526-528

Pyrrhalta kambaitiensis sp. nov.

( Figs 4 , 14 , 33 )

Type locality. Myanmar, Kambaiti .

Types examined. Holotype: ♂, “N. E. BURMA / Kambaiti , 7000 ft. [p] / 3/5 1934 [h] / R. MALAISE [w, p]” ( NHRS). The holotype is provided with one additional printed red label: “ HOLOTYPUS, / Pyrrhalta / kambaitien- sis sp. nov., / Bezděk & Lee, 2019”.

Description. Body length: ♂ 4.5 mm (holotype).

Male (holotype, Fig. 33 ). Dorsally brown, relatively lustrous, the following parts black with green metallic tint middle part of vertex, three elongate spots on pronotum, scutellum except extreme apex and four spots on each elytron (one round spot beween humerus and scutellum, touching anterior elytral margin, transverse broad stripe with irregular anterior and posterior margins, not touching suture at lateral elytral margins, and two preapical rounded spots. Antennae brown. Legs brown with slightly infuscate middle part of tibiae. Ventral side: head and prosternum brown, mesoventrite black with brown middle part, metaventrite brown with black lateral margins, abdomen completely brown.

Head. Labrum transverse with rounded anterior margin, surface with transverse row of several punctures bearing long pale setae. Anterior clypeal margin straight. Anterior part of head lustrous, sparsely covered with punctures and short pale setae. Interantennal space narrow, 0.5 times as wide as transverse diameter of antennal insertion. Interocular space 2.45 as wide as transverse diameter of eye. Frontal tubercles subquadrate, strongly bulging, semiopaque, separated each other by thin sulcus, laterally demarcated by thin furrow, in apical half covered with microsculpture, in posterior half covered with microsculpture mixed with small punctures. Vertex semiopaque, covered with microsculpture, small punctures and short setae. Antennae thin with slightly more elongate apical antennomeres, 0.64 times as long as body, length ratios of antennomeres I–XI equal to 14-8-12-10-9 -8-9- 8-8-10-17, antennomeres VIII-XI slightly flattened on ventral side.

Pronotum transverse, twice as wide as long, widest at anterior third. Anterior margin widely, weakly concave, lateral margins obtuse angulate with rounded middle part, anteriorly and posteriorly convergent and nearly straight, posterior margin slightly concave, lateral part of posterior margin oblique and concave. All margins thinly bordered. Anterior and posterior angles toothed, with setigerous pores (setae broken in holotype). Surface with distinct elevation along anterior margin, laterally curved posteriorly, disc transversely impressed. Elevation glabrous and lustrous in middle part, laterally sparsely covered with punctures, disc densely covered with large punctures and short setae.

Scutellum subtriangular, with rounded apex, surface covered with small punctures and short setae.

Elytra elongate and relatively flat, slightly extended posteriorly, 0.75 as long as body, 1.80 times as long as wide, lustrous, covered with small confused punctures with interspaces as wide as or narrower than puncture diameters and dense short pale setae, surface even. Humeral calli well developed. Epipleura wide, in apical quarter gradually narrowing towards apex, glabrous, smooth. Macropterous.

Ventrally semiopaque, covered with longer pale setae. Last abdominal ventrite with deep V-shaped incision.

Legs moderately narrow. Mesotarsi: mesotarsomere I triangular, in lateral view with very small tooth in midlength ventrally ( Fig. 14 ), length ratios of mesotarsomeres I–III equal to 7-7-5. Metatarsi: metatarsomere I elongate triangular, length ratios of metatarsomeres I–III equal to 10-8-5. Protarsi, all tarsomeres IV and claws missing in holotype.

Aedeagus ( Fig. 4 ) with apical quarter narrow, finger shaped, strongly curved dorsally and slightly left. Basal half of aedeagus nearly parallel.

Female unknown.

Differential diagnosis. Pyrrhalta kambaitiensis sp. nov. can be distiguished from other maculate Pyrrhalta species by the combination of following characters: dorsally relatively lustrous, black spots with distinct metallic sheen, middle pair of elytral spots connected to transverse stripe (elytra dull, without metallic sheen on black spots and middle pair of spots separated in other species), pronotum covered with large punctures (punctures distinctly smaller in other species), aedeagus with thin finger-like apical process curved upwards ( Fig. 4 ).

Distribution. Myanmar.

Etymology. Named after the type locality Kambaiti ( Myanmar).

Figures

FIGURES 1–7. Aedeagus. 1—Pyrrhalta maculata (basal half in dorsal view, apical half in dorsal view, lateral view); 2—P. carolusi sp. nov. (dorsal and lateral views); 3—P. kaboureki sp. nov. (dorsal, lateral and ventral views); 4—P. kambaitiensis sp. nov. (basal part in dorsal view, apex in dorsal view, lateral view); 5—P. lucka sp. nov. (dorsal and lateral views); 6—P. schillhammeri sp. nov. (dorsal and lateral views); 7—P. tsoui sp. nov. (basal part in dorsal view, apex in dorsal view, lateral view). Scale bar: 0.5 mm.

FIGURES 8–21. Details of Pyrrhalta males. 8—P. kaboureki (last abdominal ventrite); 9—P. lucka sp. nov. (last abdominal ventrite); 10—P. lucka sp. nov. (protarsus, lateral view); 11—P. schillhammeri sp. nov. (protarsus, lateral view); 12—P. carolusi sp. nov. (mesotarsus, lateral view); 13—P. kaboureki sp. nov. (mesotarsus, lateral view); 14—P. kambaitiensis sp. nov. (mesotarsus, lateral view); 15—P. lucka sp. nov. (mesotarsus, lateral view); 16—P. schillhammeri sp. nov. (mesotarsus, lateral view); 17—P. kaboureki (metatarsus, dorsal view); 18—P. maculata (antenna, dorsal and lateral views); 19—P. carolusi sp. nov. (antenna, dorsal and lateral views); 20—P. lucka sp. nov. (antenna, dorsal view); 21—P. schillhammeri sp. nov. (antenna, dorsal view). Scale bars: 1.0 mm for Figs 8–9, 0.5 mm for Figs 10–21.

FIGURES 31–36. Male habitus. 31—Pyrrhalta carolusi sp. nov. (holotype, 4.3 mm); 32—P. kaboureki sp. nov. (holotype, 3.9 mm); 33—P. kambaitiensis sp. nov. (holotype, 4.5 mm); 34—P. lucka sp. nov. (holotype, 3.8 mm); 35—P. schillhammeri sp. nov. (holotype, 3.7 mm); 36—P. tsoui sp. nov. (paratype, 3.9 mm).