Bracon santachezae Samartsev 2018, sp. nov.
Creators: name: Samartsev, Konstantin G.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Braconidae
Bracon
Bracon santachezae

description: Bracon santachezae sp. nov.
(Figs 35–48)
Type material. Holotype: female, Russia, Primorsky kray, Spassk District, Santakheza (= Novoselskoye), rice field, sweeping, 23.VII.1971, Pineker (ZISP). Paratypes: 1 ♂ with the same label as the holotype (ZISP); Primorsky kray, Chernigovka District, 10 km SE Chernigovka, glades, shrubs, 1 ♀, 27.VII.1996, S.A. Belokobylskij (ZISP); Primorsky kray, Khasan District, Lake Khasan, meadows, shrubs, oakery, 1 ♀, 12– 14.VIII.1998, S.A. Belokobylskij (ZISP).
Etymology. The specific epithet refers to the former name of the type locality, the settlement Santakheza (now Novoselskoye).
Description. Female. Body length 3.4–3.6 mm; fore wing length 3. 0–3.2 mm.
Head. Width of head (dorsal view) 1.5–1.6× its median length. Head rounded behind eyes (dorsal view). Transverse diameter of eye (dorsal view) 1.55–1.90× longer than temple. Eyes with sparse short setae. OOL 3.0– 3.3× Od; POL 1.55–1.60× Od; OOL 1.9–2.1× POL. Frons with weak medio-longitudinal groove. Longitudinal diameter of eye in lateral view 1.45–1.55× larger than its transverse diameter. Transverse diameter of eye (lateral view) 1.3–1.5× longer than minimum width of temple; hind margins of eye and temple diverging ventrally. Face width 1.45–1.75× combined height with face and clypeus, 2.3–3.0× larger than width of hypoclypeal depression. Longitudinal diameter of eye 2.2–2.6× longer than malar space (front view); malar space 0.75–0.90× as long as base of mandible. Malar suture absent. Width of hypoclypeal depression 0.9–1.2× as large as distance from depression to eye. Clypeus flattened, with protrudent ventral rim, height of clypeus 0.3–0.4× width of hypoclypeal depression.
Antenna with 38 antennomeres, 1.3× as long as fore wing. First flagellomere 2.3–2.7× longer than its apical width, 1.00–1.15× longer than second flagellomere. Middle flagellomeres 1.7–2.1× longer than their width. Penultimate flagellomere 2.2× longer than wide. Apical flagellomere acutely pointed.
Mesosoma 1.8–2.1× longer than its maximum height. Transverse oblique pronotal sulcus deep and crenulate. Mesoscutum as wide as its median length (dorsal view). Notauli deep anteriorly, smoothened posteriorly, united just before scutellar sulcus. Median lobe of mesoscutum glabrous. Scutellar sulcus crenulate, 0.15–0.17× as long as scutellum. Mesepimeral sulcus weakly crenulate. Middle area of metanotum (dorsal view) with incomplete longitudinal carina. Propodeum with areolate-rugose mid-longitudinal impression and short median carina in anterior third. Metapleural sulcus crenulate.
Wings. Fore wing 0.85–0.95× as long as body, 2.9–3.2× longer than its maximum width. Pterostigma 3.1–3.9× longer than broad. Vein r arising just before its middle. Vein 1-R1 1.45–1.65× longer than pterostigma. Marginal cell 6–11× longer than distance from its apex to apex of wing. Vein 3-SR 2.8–3.4× longer than vein r, 0.5–0.7× as long as vein SR1, 1.3–1.7× longer than vein 2-SR. Vein 1-M 0.7–0.9× as long as vein 1-SR+M, 1.5–2.0× longer than vein m-cu and 1.9–2.2× longer than vein cu-a. Vein 2-SR+M 0.1–0.2× as long as vein 2-SR, 0.2–0.5× as long as vein m-cu. Vein 1-CU1 (posterior margin of discal cell) 2.5–2.6× longer than vein cu-a. Vein cu-a interstitial or weakly postfurcal.
Legs. Hind femur 2.8–3.1× longer than wide. Hind tibia 1.55–1.60× longer than hind femur, its inner spur 0.48–0.50× as long as hind basitarsus. Hind tarsus 0.95–1.05× as long as hind tibia. Fifth segment (without pretarsus) of hind tarsus 0.6–0.7× as long as hind basitarsus and 1.05–1.20× as long as second segment. Basal lobes of claws large, rounded but not protruding, with a row of short spines basally.
Metasoma 1.2–1.3× as long as mesosoma. Median length of first tergite (measured from petiolar tubercle) 0.8– 1.0× as large as its apical width. Median area of first tergite separated by areolate furrow, 0.63–0.65× as wide as apical width of tergite. Dorsolateral arcuate carina complete, crossing median area in middle of tergite, weakly curved toward apex. Second tergite without mediobasal area, with weak parallel sublateral impressions, 1.2–1.4× longer than third tergite medially. Basal width of second tergite 1.25–1.35× median length. Suture between second and third tergites deep, medially almost straight crenulated. Apical margins of third to sixth tergites smooth, but without transverse subapical grooves. Ovipositor sheath 0.30–0.35× as long as fore wing. Apex of ovipositor with dorsal nodus and ventral serration.
Sculpture. Body mainly smooth. Face and frons very weakly granulate. Propodeum rugose (except for anterolateral areas). First metasomal tergite rugose. Second metasomal tergite rugose with longitudinal rugosity, third to sixth tergites with weak fingerprint-like sculpture.
Colour. Body mainly reddish-yellow. Antenna dark brown. Head dorsally, mesoscutum, mesopleuron, metapleuron and vague patch on metasoma reddish-brown. Axilla, propodeum, first metasomal tergite and median patch on second tergite brownish-black. Wing membrane faintly darkened, pterostigma yellow with brownish base and apex, veins brownish-yellow.
Male. Body length 2.3 mm; fore wing length 2.3 mm. OOL 2.2× Od; OOL 1.4× POL. Face width 1.3× combined height with face and clypeus. Longitudinal diameter of eye 3.2× longer than malar space (front view). Wings. Pterostigma 2.5× longer than broad. Vein 3-SR 3.0× longer than vein r. Vein 1-M 1.9× longer than vein mcu. Hind femur 3.6× longer than wide. Median length of first tergite as large as its apical width. Second tergite 1.15× longer than third tergite medially. Basal width of second tergite 1.1× median length. Propodeum mainly smooth. Otherwise similar to female.
Distribution. Russia: Primorsky kray.
Comparative diagnosis. Together with Bracon kotenkoi sp. nov., B. santachezae sp. nov. belongs to a species group of the section Orthobracon Fahringer sensu Tobias that is separated by basal lobes on claws not angularly protruding, elongate body and more or less completely sculptured metasoma. The differences between the Palaearctic members of this species group are listed in the key below.
1 Second metasomal tergite 1.2–1.4× longer than third tergite medially (Fig. 44). Basal width of second tergite 1.25–1.35× its median length.................................................................. Bracon santachezae sp. nov.
- Second metasomal tergite 0.90–1.15× longer than third tergite medially (Figs 29, 51, 54, 59). Basal width of second tergite 1.5–1.9× its median length.............................................................................. 2
2 Longitudinal diameter of eye 1.60–1.75× longer than malar space (front view; Fig. 23)........... Bracon kotenkoi sp. nov.
- Longitudinal diameter of eye 2.1–2.9× longer than malar space (front view; Figs 52, 55, 61).......................... 3
3 Ovipositor sheath 1.25–1.60× longer than hind tibia, 0.38–0.55× as long as fore wing (Figs 49, 57). Vein 1-M 0.9–1.0× as long as vein 1-SR+M.—Frons granulate....................................................................... 4
- Ovipositor sheath 0.8–1.1× as long as hind tibia, 0.24–0.31× as long as fore wing. Vein 1-M 0.55–0.80× as long as vein 1- SR+M (Fig. 64)....................................................................................... 6
4 Transverse diameter of eye (lateral view) 1.8–2.5× longer than minimum width of temple (Fig. 53); hind margins of eye and
temple distinctly diverging ventrally....................................................... Bracon fulvipes Nees - Transverse diameter of eye (lateral view) 1.2–1.3× longer than minimum width of temple (Fig. 56); hind margins of eye and temple almost parallel.................................................................................. 5
5 Wing membrane brownish darkened. Vein 2-SR+M about 0.1× as long as vein 3-SR. Pterostigma 4.5× longer than broad................................................................................... Bracon zonulatus Fahringer
- Wing membrane weakly darkened. Vein 2-SR+M about 0.3× as long as vein 3-SR. Pterostigma about 3× longer than broad.................................................................................... Bracon andriescui Papp
6 Middle flagellomeres 1.8–2.0× longer than their width. Vein 1-M 6.0–7.6× vein 1-SR. Transverse diameter of eye (dorsal view) 1.65–1.85× longer than temple (Fig. 62). Wings weakly darkened (Fig. 64)................ Bracon ovoides Telenga
- Middle flagellomeres 1.3–1.6× longer than their width. Vein 1-M 3.7–4.7× vein 1-SR. Transverse diameter of eye (dorsal view) 1.25–1.55× longer than temple. Wings distinctly brownish darkened............... Bracon subcylindricus Wesmael
Remark. The key is based on examination of the type material of all listed species. Bracon subcylindricus is considered here to be a valid species despite the recent synonymisation with B. longicollis Wesmael (Papp, 2012). Two latter species clearly differ by the shape of tarsal claws.
description: Published as part of Samartsev, Konstantin G., 2018, New species of the subfamily Braconinae (Hymenoptera: Braconidae) from the Russian Far East, pp. 238-254 in Zootaxa 4388 (2) on pages 245-249, DOI: 10.11646/zootaxa.4388.2.6, http://zenodo.org/record/1187334