Pectotibialis paghmanensis Tshernyshev, 2021

Tshernyshev, Sergei E., 2021, Pectotibialis paghmanensis Tshernyshev gen. nov. - a new genus and species of soft-winged flower beetle (Coleoptera, Cleroidea, Malachiidae) from Afghanistan, European Journal of Taxonomy 775, pp. 1-14 : 4-8

Pectotibialis paghmanensis Tshernyshev sp. nov.

urn:lsid:zoobank.org:act:93EC6FFD-B1D1-409F-B12A-081E1D5B96F5

Figs 1–2

Material examined

Holotype AFGHANISTAN • ♂; Kabul Province, near Paghman village, 34°35′ N, 68°57′ E, 2600 m a.s.l.; 12 Jul. 2009; O. Pak leg.; SCH_ISEA_000123 .

Paratypes AFGHANISTAN • 6 ♀; same collection data as for holotype; SCH_ISEA_000124–129 .

Description

Holotype, male ( Fig 1A–B )

BODY. Elongate, subparallel, slightly expanded posteriorly, elytra not covering two ultimate segments of the abdomen.

LABRUM, LABIUM, MANDIBLES, PALPI, MOUTHPARTS AND ANTENNAE. Yellow-brown, except for black spots on upper side of the 1 st antennomere ( Fig. 2D ), tibiae and tarsi in all legs, coxae and trochanters in anterior legs and commissure parts between them in intermediate and posterior legs and membranes of abdominal ventrites yellow, other body parts black–brown; upper surface of head, pronotum and elytra with a weak green metallic tint. Surface evenly covered with yellow-white dense fine long erect and curved hairs. Vesicles white-yellow, and thoracic mesepimera black.

HEAD. Not wider than pronotum, interocular area slightly impressed and edged with thin carina, frons with two tubercles, eyes small, oval, weakly protruding; genae short and straight; clypeus narrow, transverse, straight; labrum narrow, transverse; palpae simple with apical segment slightly widened and securiform; surface of head dull, sparsely indistinctly punctured lacking microsculpture, evenly covered with light fine long and curved pubescence.

ANTENNAE. Weakly flabellate from 6 th to 11 th antennomeres ( Fig. 1D ), 1.7 mm long, reaching the base of elytra; 1 st antennomere enlarged, round-oval, 2 nd antennomere small, round, almost completely invisible, hidden by the 1 st antennomere, 3 rd and 4 th antennomeres triangular, the 3 rd is 1.2 times as long and wide as the 4 th antennomere, 5 th antennomere triangular with elongate outer edge and is as long as the 3 rd antennomere, but considerably narrower than it, 6 th to 10 th antennomeres with extended outer edges, apical segment elongate, thin, subcylindrical, slightly curved in basal third; surface evenly covered with short, yellowwhite adpressed pubescence with single erect longer light hairs on outer sides of the antennomeres.

PRONOTUM. Almost completely equilateral, narrowly transverse impressed near basal margin, disk convex with wide subtriangular tubercle in a middle and look bituberculate at base; anterior margin slightly convex; posterior margin straight; lateral sides almost completely straight with rounded angles; basal side and basal half of lateral sides slightly flattened and distinctly marginate, anterior side indistinctly marginate; surface glabrous, with sparse smoothed punctures lacking microsculpture, evenly covered with fine long curved light hairs.

SCUTELLUM. Small, triangular with rounded tip, almost completely covered by pronotum, sparsely punctured and covered with light semi-erect hairs.

ELYTRA. Oblong, parallel or slightly widened just behind the middle and evenly rounded distally, not covering three apical segments of the abdomen, at base not wider than pronotum; humeri small, slightly protruding; apices evenly rounded, simple; disc indistinctly marginate on external sides and along suture, lateral edge in middle near epipleura slightly impressed; surface dull, coarsely punctured and wrinkled, with smoothed microsculpture, evenly covered with yellow-white long erect hairs.

HIND WINGS. Normally developed.

LEGS. Not long; posterior femora not reaching elytral apices; anterior tibiae not swollen but widened distally and with a strong rectangular excavation inwardly in apical half so that the tip of the tibiae looks like a 1 st tarsomere ( Fig. 1H–I ), intermediate and posterior tibiae simple, not swollen or emarginate, with the setae similar to that in tarsal comb arranged in apical edge near tarsus, femora wide, roundly swollen, anterior with tooth in middle ( Fig. 2A–B ), anterior trochanter oval and impressed to the basal half of the femur, all tarsi 5-segmented, slightly compressed and elongate, 2 nd tarsomere in anterior tarsi with small transverse comb above, the 1 st tarsomere enlarged, triangular, 1.3 times as long as the 2 nd tarsomere, 2 times as long as the 3 rd tarsomere and 3 times as long as the 4 th tarsomere, claw-segment flattened, as long as the 1 st tarsomere, claws very short and thin, almost completely hidden by round semi-transparent membrane at base. Surface of legs covered with light short semi-erect pubescence and sparse white long erect hairs.

VENTRAL BODY SURFACE. Sparsely punctured, shining, evenly and sparsely covered with long, fine, semierect white hairs; metathorax swollen and complicatedly sculptured: impressed in a middle, and with two protuberances, one lamellate transverse above, and the other longitudinal and possessing vertical round semi-transparent plate at apex ( Fig. 1F–G ). Pygidium slightly elongate, almost equilateral, evenly rounded distally, with long dark erect hair on outer side ( Fig. 2C ), ultimate abdominal ventrite is bilaciniate, narrow, transverse, evenly narrowed dorsally and emarginate in the middle ( Fig. 2D ), aedeagus simple, weakly curved dorsally, narrow, with elongate narrow and ventrally curved apical lamella, endophallus with three denticles at apex near lamella ( Fig. 2F ), tegmen long, narrow, with thin and short pointed parameres those are 2.3 times as short as the base of tegmen ( Fig. 2G ).

LENGTH. 3.8 mm, width (at elytral base) 0.8 mm.

Female differs in having simple head and pronotum lacking sculpture, anterior tarsi simple, lacking a comb above the 2 nd tarsomere, antennae dentate with the 3 rd and 4 th antennomeres narrow-triangular, and of the equal shape and length, anterior tibiae lacking excavation, but with stretched outer edge bearing the 1 st tarsomere, anterior femora lacking tooth, metathorax evenly convex lacking appendages, inner side of the apex of anterior and intermediate tibiae with a row of setae similar to that in tarsal comb of male, abdomen long, with four segments extending beyond apex of the elytra.

LENGTH. 4.3 mm, width (at elytral base) 1.0 mm.

Distribution

Known from type locality only, Afghanistan: Paghman environs ( Fig. 2H ).

Figures

Fig. 1. Pectotibialis paghmanensis Tshernyshev gen. et sp. nov. A, B, D–I. Holotype, ♂ (SCH_ ISEA_000123). C. Allotype, ♀. A, C. External appearance, dorsal view. B. External appearance, lateral view. D. Right antenna. E. Head, pronotum and scutellum, subdorsal view. F. Metathorax, subdorsal view. G. Metathorax, lateral view. H. Left anterior tibia and tarsus, ventral view. I. Left anterior tibia and tarsus, dorsal view. Scale bars: 0.5 mm.

Fig. 2. Pectotibialis paghmanensis Tshernyshev gen. et sp. nov., holotype, ♂. A. Femur of left anterior leg. B. Left anterior leg, ventral view. C. Left intermediate leg, ventral view. D. Pygidium. E. Ultimate abdominal ventrite. F. Aedeagus, dorsal view. G. Tegmen. H. Distribution map. Scale bars: 0.5 mm.