Philoctetes boreki Rosa, Proshchalykin & Halada, 2021

Rosa, Paolo, Proshchalykin, Maxim Yu. & Halada, Marek, 2021, Additions to the cuckoo wasps (Hymenoptera, Chrysididae) of Mongolia, with description of eleven new species, ZooKeys 1068, pp. 149-187 : 149

Philoctetes boreki Rosa, Proshchalykin & Halada sp. nov.

Figure 19A-G

Material examined.

Holotype: ♂, Mongolia, Tuv, Khangaun Mts , 5 km N of Khunt, 20.VII.2005, leg. JH (MSNM).

Diagnosis.

Philoctetes boreki sp. nov. is characterised by greenish-blue body colour and metanotal projection, more or less projecting over propodeum; flattened body; shallow punctuation and long, blackish erect setae.

Description.

Male. Body length 4.8 mm. Head. Brow, vertex, face between eye and scapal basin with dense, large-sized punctures (0.5-0.7 MOD) (Fig. 19A ); with two impunctate areas laterad posterior ocelli; scapal basin asetose, deep and hemicircular (Fig. 19G ), with irregular wrinkles following the scapal basin contour; gena with small punctures; genal carina sharp, not bisecting MS; ocellar triangle isosceles, postocellar line indistinct; anterior margin of clypeus straight, thickened, non-metallic brown. Relative length of P:F1:F2:F3 = 1.0:1.5:1.1:1.0; OOL = 3.3 × MOD; POL = 2.7 × MOD; MS = 0.6 × MOD; genae, brow and temples with elongate, thick setae (1.5-2.0 × MOD). Mesosoma. Pronotum with sparse, shallow and small punctures, smaller than punctures on head; interspaces polished and wide (up to 3 PD); mesoscutum with small, shallow punctures mostly clumped along notauli and parapsidal lines (Fig. 19A ); punctures at base of mesoscutum larger; notauli line deep and narrow; parapsidal line deep and complete; mesoscutellum with dense, large punctures (up to 1 × MOD), antero-medially with polished area; metascutellum longer than mesoscutellum, mucronate, with elongate and triangular lamella apically rounded; mesopleuron with irregular-sized punctures; posterior propodeal projections short and blunt; mesosoma, including femora, with black, elongate and thick setae. Metasoma. T1 antero-medially polished, with scattered dots on posterior margin, laterally with double punctation with larger, deep punctures mixed with small, sparse dots; T2 with small, even and uniformly scattered punctures dorsally; with double punctation laterally, as on T1; T3 with irregular deep and larger punctures and few scattered dots; lateral edge of T3 slightly sinuous medially; apical margin of T3 bordered by non-metallic brown rim; apical notch deep, triangular (Fig. 19E ); T3 with long (2.0 MOD), black and thick setae. Colouration. Body deep blue with light blue to green areas on face, metascutellum, mesopleuron and mesosoma laterally; scape green, pedicel and flagellum black; tegulae dark brown; forewing slightly hyaline; meso- and metafemur unusually dark brown; T3 covered with long, erect, thick setae.

Female. Unknown.

Etymology.

The specific epithet Philoctetes boreki (masculine noun in genitive) is dedicated to Borek Halada ( České Budějovice, Czech Republic), son of Marek, for his precious contribution in the organisation of the present article.

Comparative diagnosis.

Philoctetes boreki sp. nov. is related to a few other high altitude Alpine and Central Asian species. They all share some morphological features, such as flattened body, shallow punctuation and long, blackish erect setae ( Rosa et al. 2017b). It shares with the Alpine Philoctetes putoni (du Buysson, 1892) and P. helveticus (Linsenmaier, 1959) greenish-blue body colour and metanotal projection, more or less projecting over propodeum. P. boreki sp. nov. is separated from these species by distribution of black setae, mostly focused on the last visible tergum and different shape of metanotal plate ( Rosa et al. 2017b). Central Asian species belonging to this group are P. elongatus (Semenov-Tian-Shanskij & Nikol’skaya, 1954) (from Tajikistan), P. hirsutus (Semenov-Tian-Shanskij, 1932) (Kyrgyzstan and Uzbekistan) and P. hirtus (Semenov-Tian-Shanskij, 1932) (Kyrgyzstan). P. boreki sp. nov. is separated from these Central Asian species by mucronate metascutellum (vs. metanotum conical, without distinct mucronate projection) and by P. hirtus for green-blue body colour (vs. metasoma metallic red). Another Central Asian species, P. lyubae , shares with P. boreki sp. nov. body uniformly coloured, although green to golden-green and elongate metascutellar plate, yet the habitus is normally shaped, not flattened, with short, whitish setae.

Distribution.

Mongolia (Tuv).

Figures

Figure 19. Philoctetes boreki sp. nov., male, holotype A habitus, dorsal view B genital capsule, ventral view C genital capsule, ventral view, D habitus, dorso-lateral view E metasoma, postero-lateral view F habitus, lateral view G head, frontal view. Scale bars: 1 mm.