Oxyscelio convergens Burks

Burks, Roger A., Masner, Lubomir, Johnson, Norman F. & Austin, Andrew D., 2013, Systematics of the parasitic wasp genus Oxyscelio Kieffer (Hymenoptera, Platygastridae s. l.), Part I: Indo-Malayan and Palearctic fauna, ZooKeys 292, pp. 1-263 : 75-77

Oxyscelio convergens Burks sp. n. Figures 116-121Morphbank46

Description.

Female. Body length 3.5-3.75 mm (n=19).

Radicle color: same color as scape; darker than scape. Scape color: Yellowish. A4: longer than broad. A5: longer than broad. Antennal club: formed, segments compact.

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

Lateral pronotal area: without bulge projecting towards anterior pit. Epomial corner: weak. Netrion surface anteriorly: not inflexed. Mesoscutum anteriorly: not steep. Mesoscutal median carina: present and complete. Longitudinal carina between median carina and notauli: absent. Major sculpture of medial mesoscutum anteriorly: umbilicate-foveate. Major sculpture of medial mesoscutum posteriorly: umbilicate-foveate; longitudinally rugose. Microsculpture of medial mesoscutum anteriorly: granulate. Microsculpture of medial mesoscutum posteriorly: absent. Major sculpture of mesoscutellum: umbilicate-foveate; longitudinally rugose. Microsculpture of mesoscutellum medially: absent. Microsculpture of mesoscutellum laterally: absent. Mesoscutellar apex: convex or straight. Setae along anterior limit of femoral depression: arising from rows of foveae. Number of carinae crossing speculum above femoral depression: 3; 4. Number of carinae crossing femoral depression: more than 5. Mesepimeral sulcus pits: more than 5. Metascutellum dorsally: concave. Metascutellar sculpture dorsally: smooth or with transverse carinae. Median carina of metascutellum: absent or branched. Metascutellar setae: absent. Metascutellar apex: weakly emarginate. Metapleuron above ventral metapleural area: crossed by carinae. Metasomal depression setae: absent. Lateral propodeal carinae anteromedially: weakly diverging. Anterior areoles of metasomal depression: one or more areoles present. Anterior longitudinal carinae in metasomal depression: absent. Lateral propodeal areas: separated medially. Postmarginal vein: present. Fore wing apex: reaching apex of T5; reaching apex of T6; reaching beyond T6.

T1 midlobe: with 4 longitudinal carinae. T1: without anterior bulge. T2: with straight longitudinal striae or rugae. T6: broader than long. Apical flange of T6: exposed apically. Metasomal apex: rounded. Major sculpture of T6: umbilicate-punctate; longitudinally striate or rugose. Microsculpture of T6: absent.

Male. Body length 3.35-3.65 mm (n=20). A5 tyloid: carina-like, not expanded. A11: longer than broad. Median tooth of frontal depression: absent. Median lobe of T1: with 4 longitudinal carinae. Metasomal apex: with rounded but projecting lobe-like corners.

Diagnosis.

Both sexes: Frons without elevation between antennal foramen and eye. Hyperoccipital carina present, continuous with anterior genal carina. Metascutellum narrowing posteriorly, but deeply incised. Metasomal depression elongate, with extensive sculpture; lateral propodeal carinae narrowly separated anteriorly. Female: A4, A5 longer than broad. T1 midlobe with 4 longitudinal carinae. T6 rounded apically. Male: All flagellomeres longer than broad. T1 midlobe with 4 longitudinal carinae. T7 with rounded posterolateral corners.

Etymology.

Latin participle, meaning “converging.” Does not change spelling under different genders. Refers to the posteriorly convergent mesoscutellar sculpture.

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=275500]

Material examined.

Holotype, female: TAIWAN: Taiwan Prov., Pingtung Co., Kenting National Park, 230m, V-1991, pan trap, Starr & Wu, OSUC 368789 (deposited in CNCI). Paratypes: TAIWAN: 18 females, 38 males, OSUC 368776, 368778-368780, 368782-368783, 368785-368786, 368788, 368790, 368792-368794, 368796-368799, 368801, 368803-368804, 368806-368807, 368814-368824, 368826-368827, 368830-368831, 368833, 368836-368837, 368839, 368842-368844, 368846 (CNCI); OSUC 199585-199586 (FSCA); OSUC 368781, 368800, 368809, 368811, 368841, 368845 (OSUC); OSUC 439690, 439692, 439954 (TARI).

Comments.

Oxyscelio convergens belongs to a set of species with an elongate metasomal depression (the median portion of the propodeum anterior to the propodeal foramen), and with an elongate, posteriorly narrowing but deeply incised metascutellum. The metasomal depression is extensively sculptured in these species. The anterior portion of the lateral propodeal carina, laterally bordering the metasomal depression, is also conspicuously long in these species.