Hesperopenna arnoldi, Bezděk, 2013

Bezděk, Jan, 2013, Revision of the genus Hesperopenna (Coleoptera: Chrysomelidae: Galerucinae). I. Generic redescription, definition of species groups and taxonomy of H. medvedevi species group, Acta Entomologica Musei Nationalis Pragae 53 (2), pp. 715-746 : 729-731

Hesperopenna arnoldi sp. nov.

( Figs 14 , 22 , 30 , 37 , 44 , 51 )

Type locality. China, Yunnan, Jinghong env., 21°57.617′N 100°35.985′E.

Type material examined. HOLOTYPE: ♂, ‘ China, Yunnan, env./ Jinghong 12/19.vi.2006 / N 21°57,617´/ E 100°35,985´1350 m / R. Novak leg. [w, p]’ ( NMPC) . PARATYPES: 3 ♀♀, ‘12- 21.6.2006 Čína / Jinghong 1550 mnm / N 21°57, E 100°35 / lgt. Kremitovský [w, p]’ ( JBCB) ; 1 ♂, ‘NW Thailand, 1.-7.V. / 1992, MAE HONG SON / Ban Si Lang / 1000m, S. Bily leg. [w, p]’ ( NHMB) ; 3 ♂♂ 1 ♀, ‘ LAOS c. Bolikhamsai prov. / BAN NAPE-KAEW NUA-pass / 18 iv – 1 v 1998, 600m. / N 18°22,3´E 105°09,1´/ lgt Sausa [w, p]’ ( RBCN, UACG) ; 1 ♀,‘ LAOS north, 13-24.V.1997 / 15 km NW Louang Namtha / N 21°07.5, E 101°21.0 / alt. 750± 100 m / E. Jendek & O. Šauša leg. [w, p]’ ( JBCB) ; 1 ♀,‘ LAOS, / Luang Namtha / 1997 [w, p]’ ( FKCC) .

Material not included in the type series. 2 ♂♂, ‘ LAOS c. Bolikhamsai prov. / BAN NAPE-KAEW NUA-pass / 18 iv – 1 v 1998, 600m. / N 18°22,3´E 105°09,1´/ lgt Sausa [w, p]’ ( RBCN, UACG). See Comments below.

Description. Body length: ♂♂ 7.7–9.2 mm (holotype 8.4 mm), ♀♀ 7.7–10.0 mm.

Male (holotype, Fig. 51 ). Body completely brown, apices of mandibles black, antennae gradually darkened from antennomere III, apical half of elytra slightly paler than rest of elytra.

Interocular space 1.87 times as wide as transverse diameter of eye. Antennae 0.80 times as long as body, length ratio of antennomeres I to XI equals 14-5-7-15-16-16-16-16-16-14- 15. Pronotum 1.60 times as broad as long. Elytra 1.77 times as long as wide (measured at humeral calli), 0.80 times as long as body. At least apical two thirds of elytra densely covered with short pale setae. Length ratio of metatarsomeres I–IV equals 12-5-5-9. Last ventrite posteriorly with two small incisions ( Fig. 22 ).

Aedeagus: dorsal side with long thin incision separating slightly wider and longer left part with wider apex from narrower and shorter right part with subtriangular apex; ventral side apically with tape-like slightly right-turn process in middle, right side with deep U-shaped incision, left side with short triangular incision ( Fig. 14 ).

Female. Apex of last ventrite with wide shallow concavity ( Fig. 30 ), pygidium with small U-shaped incision ( Fig. 37 ). Spermatheca: nodulus subglobular, cornu regularly rounded, wider than nodulus, apical appendage distinct, triangular ( Fig. 44 ).

Variability. Width/length ratio of pronotum in males varies between 1.51 – 1.60, in females 1.46 – 1.57.

Differential diagnosis. Having most of elytral surface densely covered with short pale setae and completely brown legs, Hesperopenna arnoldi sp. nov. is similar to H. medvedevi nom. nov. and H. sipekorum sp. nov. Elytral setation covers at least the apical 2/3 of elytra while only the apical half in H. medvedevi and H. sipekorum sp. nov. All three species can be separated by the structure of the ventral side of aedeagus. Hesperopenna medvedevi nom. nov. has aedeagus more or less symmetrical ventrally, apex formed by a subtriangular process with a rounded tip, lateral incisions short and of the same depth, while H. arnoldi sp. nov. and H. sipekorum sp. nov. have aedeagus asymmetrical ventrally with a deep incision on the right and a shallow incision on the left. Proximal part of aedeagus of H. sipekorum sp. nov. is comparatively shorter and more robust than in H. arnoldi sp. nov. Moreover, ventral side of aedeagus of H. sipekorum sp. nov. forms a thin keel bent downwards ( Figs 11, 14 , 17 ). Females of these three species can be distinguished by apex of pygidium with an U-shaped incision which is large and deep in H. sipekorum sp. nov., very small in H. arnoldi sp. nov. and of medium size in H. medvedevi ( Figs 34, 37, 39 ).

Etymology. Dedicated to Ulf Arnold (Berlin, Germany), specialist in Chrysomelidae , who kindly allowed the study of specimens from his collection.

Distribution. China (Yunnan), Laos, Thailand.

Comments. Two males from Laos are left out of the type series because the deep U-shaped incision in the apical part of the ventral side of aedeagus is placed oppositely (on the left side, while in all other males it is placed on the right side).

Figures

Figs 11–14.Aedeagus (a – dorsal view; b – lateral view; c – ventral view). 11 – Hesperopenna medvedevi nom.nov.; 12 – H. persimilis (Kimoto, 1989); 13 – H. tibialis (Kimoto, 1989); 14 – H. arnoldi sp. nov. Scale bar 1 mm.

Figs 19–26. Last abdominal ventrite of males.19 – Hesperopenna medvedevi nom. nov.; 20 – H. persimilis (Kimoto, 1989); 21 – H. tibialis (Kimoto, 1989); 22 – H. arnoldi sp. nov.; 23 – H. bonifaci sp. nov.; 24 – H. helferi sp. nov.; 25 – H. sipekorum sp. nov.; 26 – H. zofka sp. nov. Scale bar 1 mm.

Figs 27–33.Last abdominal ventrite of females. 27 – Hesperopenna medvedevi nom.nov.; 28 – H.persimilis (Kimoto, 1989); 29 – H. tibialis (Kimoto, 1989); 30 – H. arnoldi sp. nov.; 31 – H. helferi sp. nov.; 32 – H. sipekorum sp. nov.; 33 – H. zofka sp. nov. Scale bar 1 mm.

Figs 34–40. Female pygidium. 34 – Hesperopenna medvedevi nom. nov.; 35 – H. persimilis (Kimoto, 1989); 36 – H. tibialis (Kimoto, 1989); 37 – H. arnoldi sp. nov.; 38 – H. helferi sp. nov.; 39 – H. sipekorum sp. nov.; 40 – H. zofka sp. nov. Scale bar 1 mm.

Figs 41–47. Spermatheca. 41 – Hesperopenna medvedevi nom. nov.; 42 – H. persimilis (Kimoto, 1989); 43 – H. tibialis (Kimoto, 1989); 44 – H. arnoldi sp. nov.; 45 – H. helferi sp. nov.; 46 – H. sipekorum sp. nov.; 47 – H. zofka sp. nov. Scale bar 0.25 mm.

Figs 48–51.Habitus. 48 – Hesperopenna medvedevi nom. nov.(male, Vietnam, 8.2 mm); 49 – H. persimilis (Kimoto, 1989) (male, Thailand, 6.2 mm); 50 – H. tibialis (Kimoto, 1989) (male, Laos, 9.5 mm); 51 – H. arnoldi sp. nov. (male, holotype, 8.4 mm).

Figs 15–18. Aedeagus (a – dorsal view; b – lateral view; c – ventral view). 15 – H. bonifaci sp. nov.; 16 – H. helferi sp. nov.; 17 – H. sipekorum sp. nov.; 18 – H. zofka sp. nov. Scale bar 1 mm.