Agelopsis konstantinovi Bezdek 2020, sp. nov.
Creators: name: Bezděk, Jan
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Agelopsis
Agelopsis konstantinovi

description: Agelopsis konstantinovi Bezděk, sp. nov.
(Figs 16, 25, 42, 44, 52, 59, 66)
urn:lsid:zoobank.org:act: CD059F90-415D-4B14-A779-380394DD940E
Type locality. China, Shaanxi, Qin Ling mts., An Kang, 33°47.496′N 108°53.407′E.
Types. Holotype: ♂ (USNM), “ China: Shaanxi Prov, Qin / Ling mts. An Kang WP-393 / N33°47.496 E108°53.407 / 12.VI.2013 h= 1430 m / leg. A. Konstantinov [w, p]”. Paratypes: 2 ♂♂ 3 ♀♀ (USNM), same data as holotype; 1 ♂ (OKCZ), “ China, N Sichuan, Xiao-Zhaizi Nat. / Nature Reserve, 7 km W of / Qingpianxiang, Xiao- zhaizi / 32°1´25´´N 103°56´21´´E / 27.VI.-1.VII.2017, 1560-1700 / lgt. Ondřej Konvička [w, p]”. The holotype is provided with one additional printed red label: “ HOLOTYPUS [or PARATYPUS], / Agelopsis / konstantinovi sp. nov., / J. Bezděk det., 2019”.
Description. Measurements. Males: 3.5-4.4 mm (holotype 4.4 mm), females: 4.2-4.6 mm. Dorsal side elongate oval, convex, glabrous. Dorsal side metallic blue with oil tint, antennae and legs black with slight metallic tint, ventral side black, lustrous, middle part of last abdominal ventrite brown.
Male (holotype, Fig. 16). Labrum transverse, with emarginated anterior margin and rounded anterior angles, surface with several pores bearing long seta, slightly convex. Anterior part of head with straight anterior margin, surface with transverse, concave, elevated keel, posteriorly produced to short process forming elevated nasal keel, subantennal impressions with several long setae. Interantennal space as wide as transverse diameter of antennal socket. Interocular space wide, 2.9 time as wide as transverse diameter of eye. Frontal tubercles transverse, subtrapezoidal, elevated, smooth, lustrous, lateral parts covered with indistinct wrinkles, separated by thin furrow. Vertex separated from frontal tubercles by deep impressed, almost straigth line, surface impunctate, glabrous. Antennae slender, 0.80 times as long body, length ratio of antennomeres equals 7-4-6-8-8-7-7-7-7-7-10.
Pronotum transverse, 1.42 times as wide as long, lustrous, glabrous, widest in anterior quarter, covered with very fine punctures. Surface strongly convex in anterior half, with transverse impression at posterior third. Anterior margin widely shallowly concave, lateral margins rounded at anterior half, convergent posteriorly, sinuate before posterior angles, posterior margin sinuate in middle, laterally slightly oblique. Anterior margin unbordered, lateral margins with narrow border in anterior half and wider punctured and microsculptired border in posterior half, posterior margin with narrow border in middle, wider laterally.Anterior angles distinctly swollen, oblique and transverse, posterior angles nearly rectangular, all angles with setigerous pores bearing long pale seta. Scutellum short and wide, subtriangular, with very widely rounded apex, impunctate, glabrous.
Elytra 1.35 times as long as wide (measured at humeral calli) and 0.52 times as long as body, oval, widest in middle. Surface densely covered with small confused punctures. Humeral calli developed. Epipleura relatively narrow, smooth, glabrous, lustrous, gradually narrowed towards elytral apex. Hind wings vestigial.
Abdomen (Figs 42, 44): abdominal ventrite III widely rounded, narrow, gradually constricted in middle part, centrally with small transverse vertical impression, IV widely rounded, with flat horizontal impression in middle, posteriorly surrounded by sharp keel. Last abdominal ventrite enlarged, with two oblique V-shaped incisions, me- dian lobe with sinuate lateral margins, middle part surface with distinct chanelled impression.
Metatrochanter not modified. Metatibia emarginated at inner apical margin. Tarsi: protarsomere I elongate, subparallel in anterior two thirds, II triangular, I slightly wider than II, length ratio of protarsomeres equals 10-8-6-13, mesotarsomere I slightly asymmetrical with outer margin slightly concave, length ratio of mesotarsomeres equals 13-9-6-9; metatarsomere I asymmetrical with inner margin emarginated basally, length ratio of metatarsomeres equals 19-10-6-15.
Aedeagus (Fig. 25) flat, with transversely cut and shallowly concave apex, apical third slightly convergent, middle part parallel. In lateral view, aedeagus bent in apical third, basal two thirds straight.
Female. Spermatheca with sphaerical nodulus, cornu C-shaped (Fig. 52). Gonocoxae as in Fig. 66. Sternite VIII subquadrangular, tignum thin, 2.2 times longer than sternite VIII (Fig. 59).
Differential diagnosis. With body length 3.5-4.6 mm A. konstantinovi sp. nov. is the smallest Agelopsis species, and also it is only species with vestigial hind wings and transversely cut apex of aedeagus (Fig. 25). The males have strongly modified abdomen (Figs 42, 44) as follows: abdominal ventrites III and IV are widely curved, medi- ally constricted and in middle with impressed posterior margins. Last abdominal ventrite have channeled median lobe and lateral view is widely concave.
Distribution. China: Shaanxi, Sichuan.
Etymology. Dedicated to my friend Alexander S. Konstantinov (USNM), a specialist in Alticini, who collected most specimens from the type series.
description: Published as part of Bezděk, Jan, 2020, Revision of Agelopsis (Coleoptera: Chrysomelidae: Galerucinae), pp. 223-248 in Zootaxa 4731 (2) on pages 236-237, DOI: 10.11646/zootaxa.4731.2.3, http://zenodo.org/record/3637839