Oxyscelio stenos Mo & Chen, 2021

Mo, Wen-hui, Chen, Hua-yan, Pang, Hong & Liu, Jing-xian, 2021, DNA barcoding for molecular identification of the genus Oxyscelio (Hymenoptera, Scelionidae) from southern China, with descriptions of five new species, Journal of Hymenoptera Research 87, pp. 613-633 : 613

Oxyscelio stenos Mo & Chen sp. nov.

Figure 5

Description.

Female. Body length 2.83 mm (n = 1).

Radicle color: darker than scape. Scape color: yellowish. A4: broader than long. A5: broader than long. Antennal club in female: formed, segments compact.

Interantennal process: not elongate. Median longitudinal elevation in frontal depression: present. Frontal depression: concave. Frontal depression sculpture: with 3 broadly interrupted transverse carinae below submedian carina. Submedian carina: strong, formed by a sharp raised carina. Submedian carina medially: with sharp peak. Concavity across dorsal part of frontal depression: absent. Depression extending ventrally from median ocellus: absent. Upper frons: not hood-like. Malar area near antennal foramen: without carina or expansion. Facial striae: present. Smooth strip along posterior side of malar sulcus: absent or not consistently broad. Genal carina: present. Direction of genal carina dorsally: parallel to eye margin. Major sculpture of gena anteriorly: rugose; foveate. Major sculpture of gena posteriorly: rugose; foveate. Microsculpture of gena anteroventrally: absent. Microsculpture of gena posteroventrally: granulate. Median carina extending posteriorly from hyperoccipital carina: present. Hyperoccipital carina: complete, continuous with anterior genal carina. Lateral connection between hyperoccipital and occipital carinae: present. Area between vertex and occipital carina: irregularly rugose. Occipital carina medially: convex, with a sharp median peak. Lateral corners of occipital carina: sharp and protruding.

Lateral pronotal area: without bulge projecting towards anterior pit. Transverse pronotal carina: present anteriorly and forming a corner with epomial carina. Netrion surface anteriorly: not inflected. Mesoscutum anteriorly: steep. Mesoscutal median carina: present and complete. Longitudinal carina between median carina and notauli: absent. Major sculpture of medial mesoscutum anteriorly: punctate; rugose. Major sculpture of medial mesoscutum posteriorly: punctate. Microsculpture of medial mesoscutum anteriorly: granulate. Microsculpture of medial mesoscutum posteriorly: absent. Major sculpture of mesoscutellum: punctate; longitudinally rugose. Microsculpture of mesoscutellum medially: absent. Microsculpture of mesoscutellum laterally: absent. Mesoscutellar apex: straight. Setae along anterior limit of femoral depression: arising from rows of foveae. Number of carinae crossing speculum above femoral depression: 2. Number of carinae crossing femoral depression: more than 5. Mesepimeral sulcus pits: more than 5. Metascutellum dorsally: concave. Metascutellar sculpture dorsally: foveate. Median carina of metascutellum: absent. Metascutellar setae: absent. Metascutellar apex: straight. Metapleuron above ventral metapleural area: foveate. Metasomal depression setae: absent. Lateral propodeal carinae anteromedially: strongly diverging. Anterior areoles of metasomal depression: present. Anterior longitudinal carinae in metasomal depression: present. Lateral propodeal areas: separated medially. Postmarginal vein: absent. Fore wing apex: reaching beyond apex of T6.

T1 midlobe: with 4 longitudinal carinae. T1: without anterior bulge. T2: with straight longitudinal striae. T6: broader than long. Metasomal apex: rounded. Major sculpture of T6: punctate. Microsculpture of T6: absent. S2: with longitudinal rugae. S5: with longitudinal striae. S6: punctate.

Male. Unknown.

Diagnosis.

Female: A4 and A5 broader than long. Frontal depression with median longitudinal elevation. Frons without elevation between antennal foramen and eye. Hyperoccipital carina present, extending ventrally around outer orbit of compound eye. Medial mesoscutum punctate. Metascutellum without dorsal setae. T1 with 4 longitudinal carinae. Oxyscelio stenos is similar to O. ogive and O. striae but can be separated from the latter two species by the narrow metascutellum and the median longitudinal elevation on frontal depression (see the updated key below).

Etymology.

The name stenos refers to the narrow metascutellum of this species. The epithet is used as a noun in apposition.

Material examined.

Holotype, female: China: Yunnan, Wenshan City, Pingba Town , 1793 m, 23.23644°N, 104.100955°E, 31.VIII-22.IX.2009, Malaise trap, SCAU 3049080 (deposited in SYSBM).

Distribution.

China (Yunnan).

Figures

Figure 5. Oxyscelio stenos Mo & Chen, sp. nov., holotype, female (SCAU 3049080) A dorsal habitus B lateral habitus C head and mesosoma, dorsal view D head and mesosoma, lateral view E head, anterior view F antenna G metasoma, dorsal view H metasoma, ventral view.