Chrysis sibirica Rosa, 2017

Rosa, P., Proshchalykin, M. Yu., Lelej, A. S. & Loktionov, V. M., 2017, Contribution to the Siberian Chrysididae (Hymenoptera). Part 1., Far Eastern Entomologist 341 (341), pp. 1-44 : 24-27

Chrysis sibirica Rosa , sp. n.

Figs 13B, D , 14A–F

SPECIMENS EXAMINED. Holotype – ♀, Russia: Tuva Rep., 31 km NEE

Erzin, Erzin River, 18.VII 2014 (AL, MP, VL) [ZIN]. Allotype – ♂, same data as holotype [ZIN] . Paratypes: same data as holotype, 5 ♂, 2 ♀ (AL, MP, VL) ;

Buryatia Rep.: Gusinoe Lake, Baraty , 26.VII 2007, 1 ♀ (AL, MP, VL) [IBSS] .

DIAGNOSIS. Chrysis sibirica sp. n. belongs to the bihamata species-group. It is a medium sized species (7.5–8.0 mm long), closely related to Ch. pavesii Rosa ,

sp. n. The two species are similar, but different in body coloration ( Fig. 13 ) (fully metallic red in Ch. sibirica , fully metallic green in Ch. pavesii ; this difference appears not to be a post-mortem alteration of the specimens); different body sculpture (in Ch. pavesii with shining interspaces and shallower punctures, more spaced apart); general habitus (more robust in Ch. sibirica , with stocky metasoma,

see Figs 13A–D ); mesopleuron with episternal sulcus deeply marked only on anterior half, then becoming obsolete ( Fig. 14B ) (vs. complete in Ch. pavesii ( Fig.

15B)); mandible shape ( Ch. sibirica female has a subdentate mandible with elongate mandible apex); female TFC M-shaped in Ch. sibirica , almost straight in

Ch. pavesii ; male propodeal teeth distinctly outwards directed in Ch. sibirica (vs.

subparallel in Ch. pavesii ); male scapal basin with elongate, silvery and partially erect setae in Ch. sibirica (vs. setae appressed in Ch. pavesii male).

DESCRIPTION. Body length 7.5–8.0 mm. Fore wing length 5.0 mm. Female.

OOL = 2.0 MOD; POL = 2.2 MOD; MS = 1.2 MOD; relative length of P: F1: F2:

F3 = 1.0: 1.8: 0.8: 0.7.

Head. Vertex and frons with small (about 0.2–0.3 MOD) and contiguous punctures, with narrow polished interspaces; two large impunctate areas (1.0 MOD width)

close to posterior ocelli; TFC M-shaped and bordered by dark purple color ( Fig.

14A); scapal basin broadly polished in the third across (about 3 MOD), medially polished (about 2 MOD width), laterally punctate in the lower two thirds; subantennal space about 1.0 MOD.

Mesosoma. Pronotal groove shallow, broad and shorter than half pronotal length;

pronotum with relatively small, even and equally spaced punctures with small punctures on interspaces; mesoscutum with larger punctures, almost contiguous at base;

mesoscutellum with contiguous and corrugate punctures, postero-medially with an impunctate area; propodeal teeth slightly divergent to subparallel; mesopleuron with a peculiar episternal sulcus ( Fig. 14B ): in the upper half with small foveae,

anyway larger than other punctures on mesopleuron; in the lower part foveae vanishing, becoming shallower and smaller, smaller than punctures on the rest of mesopleuron.

Metasoma. Punctuation on T1 geminate (seen in posterior view), with small punctures widely separate (1.0–3.0 PD apart), larger along posterior margin and with fine dots on interspaces; T2 basally with larger, rugulose and irregular punctures,

geminate and partially contiguous ( Fig. 14D ); laterally and posteriorly with simple punctures widely separate; along midline with row of fine dots; T3 basally with corrugate and contiguous punctures becoming polished before pit row ( Fig. 14D );

with small scattered punctures between pit row and apical margin; pit row with small and shallow pits ( Figs 14D, 14E ) barely visible. Apical margin straight, without teeth, corners or undulations ( Fig. 14E ).

♂; B, D – Ch. sibirica Rosa , sp. n.: B – holotype ♀; D – ♂. Scale bar = 1.0 mm.

Coloration. Body entirely metallic red with greenish to coppery reflection on face, legs, propleuron, sulci on mesopleuron, metapleuron and T3 apical margin;

darker to violet on ocelli area and TFC. Tegulae brown, basally with slightly metallic reflections (metallic greenish in male); tarsi brown; scape metallic, rest of antenna black (pedicel metallic in male). Wings hyaline.

Vestiture. Body with whitish, long, erect setae (up to 2.0 MOD), longer laterally.

lateral view; C – metasoma, dorsal view; D – metasoma, postero-lateral view; E – metasoma,

posterior view; F – metasoma, ventral view. Scale bar = 1.0 mm.

Male. Similar to female, scapal basin fully micropunctate, with silvery setae; TFC

obsolete; tegulae metallic; teeth of apical margin of T3 reduced to slight undulations.

DISTRIBUTION. Russia (Tuva Rep., Buryatia Rep.) .

ETYMOLOGY. The specific epithet sibirica (adjective) is named after the type locality in Siberia .

Figures

Fig. 13. Habitus, dorsal view. A, C – Chrysis pavesii Rosa, sp. n.: A – holotype ♀; C –

Fig. 14. Chrysis sibirica Rosa, sp. n., holotype ♀: A – head, frontal view; B – mesosoma,

Fig. 15. Chrysis pavesii Rosa, sp. n., holotype ♀: A – head, frontal view; B – mesosoma,