Hedychridium propodeale Rosa, 2017

Rosa, P., Proshchalykin, M. Yu., Lelej, A. S. & Loktionov, V. M., 2017, Contribution to the Siberian Chrysididae (Hymenoptera). Part 2., Far Eastern Entomologist 342 (342), pp. 1-42 : 16-19

Hedychridium propodeale Rosa , sp. n.

Figs 6A–F , 13E, F

SPECIMENS EXAMINED. Holotype – ♀, Russia: Tuva Rep., 20 km SSW

Erzin, Tore-Khol’ Lake , 3.VII 2013 ( VL, MP) [ ZIN]. Allotype – ♂ , same data as holotype [ ZIN]. Paratypes [ ZIN, IBSS, PRC]: Russia: Khakassia Rep.: 10 km E

Shira, Itkul’ Lake, 28.VI 2014, 1 ♀ (AL, MP, VL); Tuva Rep.: 20 km SSW Erzin ,

Tore-Khol’ Lake , 30.VI–3.VII 2013, 52 ♀, 7 ♂ ( VL, MP); 27 km SSW Erzin, ToreKhol Lake , 12.VII 2014, 1 ♀ (AL, MP, VL); 13 km SW Samagaltai, Dyttyg-Khem

River, 10.VII 2013, 6 ♀, 1 ♂ (VL, MP); 6 km SE Bai-Khaak, Sosnovka , 21.VII

2014, 1 ♀ (AL, MP, VL); 30 km W Erzin, Yamaalyg , 4.VI 2013 , 1 ♀ ( MP, VL) ;

Krasnoyarsk Terr.: 10 km NE Minusinsk, Malaya Minusa River , 7.VII 2012, 2 ♀ ,

11 ♂ ( MP, VL); Selo Padun, Tunguska, 14.VII 1968 (Tchekanovskij) .

mesosoma, lateral view; C – mesosoma, dorsal view; D – mesosoma, dorsal view; E – metasoma, dorsal view; F – metasoma, lateral view. Scale bar = 0.5 mm.

DIAGNOSIS. Hedychridium propodeale sp. n., H. longigena sp. n. and H.

gabriellae sp. n. belong to the same (sub)group of H. rhodinum Semenov et

Nikol’skaya, 1954, sharing similar features. This (sub)group can be easily recognized through the combination of the following characteristics: face nearly flat, densely punctate throughout; mouth parts elongate, in lateral view a little shorter than head length ( Figs 6A, B ); genitalia with slender gonocoxae and short cuspis ( Figs 13E–

J). Within this (sub)group, H. propodeale sp. n. can be recognized through body color: metallic red-bronze, with contrasting blue propodeum and black anterior declivity of T1 ( Figs 6D, E ).

It is distinct from H. rhodinum for thin genae, seen in lateral view (vs. thick in

H. rhodinum ); punctuation on T2 decreasing, becoming shallower, with larger interspaces, on posterior third ( Fig. 5E ) (vs. punctuation on metasoma even and coarse, with medium-sized punctures). It is also similar to H. longigena sp. n. but differs through general habitus and coloration (in which coloration pattern is uniformly metallic red or with propodeum slightly greenish-rosy); larger POL (2.1 MOD)

(vs. 1.6 MOD in H. longigena ); head, in frontal view, triangularly shaped with convergent malar spaces (vs. longitudinally elongate with subparallel malar spaces).

It differs from H. gabriellae sp. n. through body coloration (entirely shining red,

including T1 anterior declivity, in H. gabriellae ); shape of propodeal angles (narrow,

digitate in H. gabriellae ); shape of genital capsule ( Figs 13G–H ).

DESCRIPTION. Female. Body length 3.2–3.5 mm. Fore wing length 2.0–2.4

mm. OOL = 2.1 MOD; POL = 2.1 MOD; MS = 1.2 MOD; relative length of P: F1:

F2: F3 = 1: 1.2: 0.8: 0.7.

Head. Face nearly flat, coarsely punctate throughout ( Fig. 6A ); frons with contiguous, longitudinally rugulose punctures; punctuation on lower face with dense,

minute punctures; scapal basin medially with fine cross-ridging. Clypeus elongate,

subantennal space> 1.5 MOD. Facial longitudinal midline only visible on upper scapal basin, not reaching midocellus or clypeal margin. Punctuation on postocellar vertex with small, dense, irregular punctures. Ocellar triangle isosceles;

posterior ocelli with pit along external margin ( Fig. 6C ).

Mesosoma. Pronotum with coarse, irregularly sized and contiguous punctures.

Mesoscutum and mesoscutellum with similar, scattered punctures; with polished,

narrow interspaces, 0.3–1.0 PD apart ( Fig. 6C ). Mesopleuron with large, contiguous,

areolate punctures; on metascutellum areolate-reticulate. Propodeal teeth subrectangular, with subparallel sides and blunt teeth. Forewing basal vein as long as RS

stub, almost straight.

Metasoma. T1, T2 antero-medially with even, small punctures, almost contiguous

( Fig. 6E ); posteriorly and laterally shallower, sparser, 2 PD apart; T3 with denser punctures. T3 posterior margin with narrow brownish rim.

Coloration. Head and body dorsally metallic red-bronze, with the exception of blue contrasting propodeum. In some paratypes other parts could be more or less extensively bluish: axillary trough, posterior margin of T1, anterior margin of T2; in few paratypes the propodeum is dark green, anyway contrasting with the rest of body color; T2 antero-medially sometimes darker to brassy. Scape and pedicel shiny black,

with metallic sheen on scape; flagellum dull, black. Tegulae brown, non-metallic.

Wings clear.

Vestiture. Body dorsally with sparse, whitish and short setae (1 MOD), metasoma laterally with appressed and erect and long setae (1.5 MOD). Legs with erect setae (1 MOD).

Male. Similar to female. Genital capsule as in Fig. 13E–F .

DISTRIBUTION. Russia (Krasnojarsk Terr., Khakassia Rep., Tuva Rep.) .

ETYMOLOGY. The specific epithet propodeale refers to the bluish coloration of the propodeum, contrasting with the rest of the body coloration.

Figures

Fig. 6. Hedychridium propodeale Rosa, sp. n., holotype, ♀: A – head, frontal view; B –

Fig. 13. Male genital capsule. A – Hedychridium ardens (Coquebert), Khakassia; B – H.

Fig. 5. Hedychridium arensi Rosa, sp. n., holotype, ♀: A – head, frontal view; B –