Pyrrhalta kaboureki, 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 : 524-526

Pyrrhalta kaboureki sp. nov.

( Figs 3 , 8, 13, 17 , 32 )

Type locality. Indonesia, Brastagi , Sibayak Mt .

Types. Holotype: ♂, “N. SUMATRA – Brastagi / Mt Sibayak , 1500-2000 m / 20–26.iv.1998 / lgt. Vít Kabou- rek [w, p]” ( NMPC). The holotype is provided with one additional printed red label: “ HOLOTYPUS, / Pyrrhalta / kaboureki sp. nov., / Bezděk & Lee, 2019”.

Description. Body length: ♂ 3.9 mm (holotype).

Male (holotype, Fig. 32 ). Head pale brown with slightly darker labrum, frontal tubercles and middle part of vertex. Pronotum pale brown with small indistinct darker spot medially, close to posterior margin. Antennomeres I-VI pale brown, gradually darker dorsally, VII-XI black. Scutellum pale brown with darker basal and middle parts. Elytra pale brown, each elytron with five brownish-black spots: one small rounded spot between humerus and scutellum, not touching anterior elytral margin; two larger longitudinaly elongate spots placed slightly before elytral midlength; two larger connected spots placed at posterior third. Legs pale brown with darker apical halves of tibiae and brownish-black tarsi. Ventral side: prosternum pale brown, mesoventrite black with brown middle part, meta- ventrite black, abdomen dark brown.

Head. Labrum transverse with rounded anterior margin, surface with transverse row of several punctures bearing long pale setae. Anterior clypeal margin with small triangular impression. Anterior part of head semiopaque, sparsely covered with punctures and setae, surfaces below antennal insertions obliquely impressed. Interantennal space narrow, 0.3 times as wide as transverse diameter of antennal insertion. Interocular space 2.0 as wide as transverse diameter of eye. Frontal tubercles triangular, semiopaque, covered with microsculpture, separated each other by thin sulcus, laterally separated from frons by shallow oblique channel, posterior margins indistinctly separated from vertex. Vertex dull, covered with microsculpture, small punctures, and short setae. Antennae long, filiform, 0.71 times as long as body, length ratios of antennomeres I–XI equal to 15-6-13-11-10- 10-10-9-9 -9-12.

Pronotum transverse, 2.0 times as wide as long, widest at anterior third. Anterior margin widely, weakly concave, lateral margins rounded at widest part, anteriorly and posteriorly convergent and nearly straight, posterior margin nearly straight, lateral part of posterior margin oblique. All margins thinly bordered. Anterior and posterior angles toothed and bearing long pale seta. Surface with distinct elevation along anterior margin, laterally curved posteriorly, disc transversely impressed. Elevation and anterior angles areas semiopaque, almost glabrous, covered with larger punctures, disc densely covered with small punctures and short setae.

Scutellum slightly convex, subtriangular, with widely rounded apex, surface very densely covered with small punctures and short pale setae.

Elytra semicylindrical, parallel, 0.69 as long as body, 1.50 times as long as wide, dull, covered with small confused punctures with interspaces wider than puncture diameters and dense short pale setae (setae darker on elytral spots), surface slightly uneven in middle part and in subscutellar area. Apical angle of each elytron rounded. Epipleura wide, in apical quarter gradually narrowing towards apex, densely covered with short pale setae.

Ventrally semiopaque, covered with longer pale setae. Last abdominal ventrite wide and curved with deep Ushaped incision ( Fig. 8 ).

Legs narrow, inner apical margin of mesotibiae emarginate, with short sharp spine. Protarsi: protarsomere I short, narrow, parallel, II subtriangular, slightly wider than I, length ratios of protarsomeres I–IV equal to 5-6-4-7. Mesotarsi: mesotarsomere I short, narrow and subparallel, ventrally with distinct tooth in basal part ( Fig. 13 ), length ratios of mesotarsomeres I–IV equal to 4-5-4-8. Metatarsi: metatarsomere I enlarged, triangular, inner apical angle more prolonged than outer one ( Fig. 17 ), II small and subtriangular, length ratios of metatarsomeres I–IV equal to 11-8-5-8. Claws bifid.

Aedeagus ( Fig. 3 ) narrow and asymmetrical, arched right at anterior third, apex subtriangular and slightly asymmetrical. Ventrally with sharp, long median keel, in apical half surrounded by elongate, anteriorly wider fur- row.

Female unknown.

Differential diagnosis. Pyrrhalta kaboureki sp. nov. differs from other maculate Pyrrhalta species by the combination of the following characters: elytral spots placed closer to elytral disc (two outer spots closer to lateral and apical margins in other species, compare Figs. 27–36 ), structure of aedeagus ( Fig. 3 ), metatarsomere I triangular and enlarged ( Fig. 17 ) (not modified in other maculate Pyrrhalta species), mesotarsus I with small subbasal tooth ventrally ( Fig. 13 ), subapical antennomeres about twice as long as wide (about 1.0–1.3 times as long as wide in other maculate Pyrrhalta species), interspaces between elytral punctation wider than puncture diameters (interspaces ca. as wide as or less than puncture diameter in other species).

Distribution. Indonesia (Sumatra).

Etymology. Dedicated to Vít Kabourek ( Czech Republic, Zlín), entomologist, publisher, and collector of the holotype.

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).

FIGURES 25–30. 25–27. Pyrrhalta maculata. 25—holotype (male, 4.5 mm); 26—holotype (labels); 27—male (Taiwan, 4.3 mm). 28–30. Unidentified females. 28—female from Sichuan (4.3 mm); 29—female from Sichuan (3.9 mm); 30—female from Yunnan (4.5 mm).