Sergey coahuilensis Zaldivar-Riveron & Martinez

Martinez, Juan Jose, Lazaro, Rubi Nelsi Meza, Pedraza-Lara, Carlos & Zaldivar-Riveron, Alejandro, 2016, Sergey gen. n., a new doryctine genus from temperate forests of Mexico and Cuba (Hymenoptera, Braconidae), ZooKeys 589, pp. 143-164 : 147-149

Taxon classification Animalia Hymenoptera Braconidae

Sergey coahuilensis Zaldivar-Riveron & Martinez sp. n. Figs 3-8, 9-10

Diagnosis.

This is the most distinctive species of the genus. It can be distinguished from the remaining members of Sergey by having the eyes considerably smaller, their height about as long as malar space (distinctly longer than malar space in the remaining species); and the first metasomal tergite broad, 1.5 times longer than its apical width (slender, at least 2.1 times longer than its apical width in the remaining species).

Description.

Body length 2.1mm (Fig. 3), fore wing 1.5mm; ovipositor sheaths 1.1mm. Colour: head excluding antennae, mesoscutum and mesopleuron brown, otherwise uniformly honey yellow. Head: about as high as wide (anterior view) (Fig. 4), 0.7 times as long as wide (dorsal view). Clypeus, face, frons and vertex largely smooth and shining (Fig. 5), with a few shallow rugae near the mandible insertion and antennal sockets; temple smooth. Eye small 1.5 times higher than wide. Malar space height/eye height ratio 1.1 (Fig. 4). Temple/eye length ratio (dorsal view) 0.6. Antenna incomplete, only with nine basal flagellomeres; first flagellomere about four times longer than wide and as long as second.

Mesosoma: 2.0 times longer than wide and 1.9 times longer than high (Fig. 6). Pronotal groove wide, and scrobiculate, pronotal carina distinct. Propleuron rugose on median third. Mesoscutum transverse, 0.6 times as long as wide. Mesoscutal lobes smooth, notauli deep and scrobiculate, obscured in an irregularly rugose median area before reaching the scuto-scutellar suture (Fig. 9). Prescutellar sulcus with three carinae, the median one straight, and the lateral ones irregular. Scutellar disc smooth and triangular. Mesopleuron smooth. Precoxal sulcus, deep, wide and scrobiculate-rugose, running along the entire length of mesopleuron. Subalar sulcus deep and rugose. Metanotum with a median carina but without a distinct projection. Metapleuron entirely areolate rugose. Propodeum with two divergent carinae running from median anterior edge delimiting two smooth dorsolateral areas, beyond these carinae it is almost uniformly areolate rugose.

Wings: fore wing (Fig. 7) length 3.0 mm, length/width ratio 3.85; vein 1cu-a postfurcal to vein 1M; veins 2RS/2M ratio 0.5.

Legs: fore tibia with a row of spines. Hind coxa slightly striate dorsally, smooth ventrally, with a small but distinct basoventral tubercule.

Metasoma: basal sternal plate/length of first tergum 0.6. First metasomal tergite 2.8 times longer than apically wide (Figs 8, 10). Second median tergite longitudinally striate on basal one fifth, smooth apically. Suture between second and third median tergites slightly sinuate. Remaining terga smooth and polished. Ovipositor length 1.2mm, 1.1 times as long as metasoma.

Male. Unknown.

Distribution.

Known only from a submontane forest at the type locality in Coahuila, Mexico.

Biology.

Unknown.

Etymology.

The specific epithet refers to Coahuila, the Mexican state where the type locality of this species is located.

Material examined.

Holotype: female (CNIN), Mexico, Coahuila, Mpio. Torreón, Sierra de Jumillo, Arroyo Palos, 09-11/X/2009, 25.13 N - 103.27 O, 2006 msnm, DNA voucher no. IB- CNIN-637, GenBank accession nos. JN870454 (COI), JN870613 (cyt b), KC822013 (EF-1alpha; not included in this work), JN870735 (wingless, not included in this work).