Oxyscelio cyrtomesos 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 : 96-99

Oxyscelio cyrtomesos Burks sp. n. Figures 155-169Morphbank54

Description.

Female. Body length 4.05-4.4 mm (n=4).

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

Interantennal process: not elongate. Median longitudinal elevation in frontal depression: absent. Frontal depression: concave. Frontal depression sculpture: with 3-5 complete transverse carinae. 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. Malar area at mouth corner: without 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. 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. Hyperoccipital carina: indicated by rugae. Lateral connection between hyperoccipital and occipital carinae: present as a weak elevation. Area between vertex and occipital carina: umbilicate-foveate. Occipital carina medially: sinuate, concave medial to corners, but without a median peak. Lateral corners of occipital carina: sharp and 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. Microsculpture of medial mesoscutum anteriorly: absent; granulate. Microsculpture of medial mesoscutum posteriorly: granulate. Major sculpture of mesoscutellum: umbilicate-foveate; umbilicate-punctate. Microsculpture of mesoscutellum medially: absent. Microsculpture of mesoscutellum laterally: granulate. 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. Number of carinae crossing femoral depression: more than 5. Mesepimeral sulcus pits: 3-5. Metascutellum dorsally: concave. Metascutellar sculpture dorsally: smooth or with transverse carinae. Median carina of metascutellum: absent or branched. Metascutellar setae: absent. Metascutellar apex: convex or straight. Metapleuron above ventral metapleural area: crossed by carinae. Metasomal depression setae: absent. Lateral propodeal carinae anteromedially: strongly diverging. Anterior areoles of metasomal depression: absent. Anterior longitudinal carinae in metasomal depression: absent. Lateral propodeal areas: meeting for only a short distance medially. Postmarginal vein: absent. Fore wing apex: reaching middle of T5; reaching apex of T5.

T1 midlobe: with 6 or more longitudinal carinae. T1: without anterior bulge. T2: with long sublateral depressions. T6: longer than broad. Apical flange of T6: not exposed apically. Metasomal apex: tapering to a sharp point. Major sculpture of T6: umbilicate-punctate. Microsculpture of T6: granulate.

Male. Body length 3.5-4.2 mm (n=8). A5 tyloid: carina-like, not expanded. A11: longer than broad. Median tooth of frontal depression: absent. Median lobe of T1: with 6 longitudinal carinae. Metasomal apex: with rounded but projecting lobe-like corners.

Diagnosis.

Both sexes: Mesoscutellum laterally granulate. Metascutellum long and tongue-shaped. Propodeum forming a nearly complete arch over the base of T1, but with a narrow break along middle of the arch. Female: A4, A5 broader than long. T1 midlobe with 6-7 longitudinal carinae. T2 with sublateral depressions. T6 strongly tapering to a narrow point. Male: A11 slightly broader than long. T1 midlobe with 5 longitudinal carinae. T7 with sharp, protruding posterolateral corners. Oxyscelio cyrtomesos is very similar to Oxyscelio zeuctomesos , but differs in development of the propodeal arch.

Etymology.

Compound noun based on Greek, meaning "convex middle." Refers to the way that the propodeum arches medially over the base of T1.

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=275531]

Material examined.

Holotype, female: INDONESIA: Kalimantan Barat Prov., Cabang Panti Research Station, 1° rainforest / alluvial light gap, IIS 910122, Gunung Palung National Park, 01°15'S, 110°05'E, 100-400m, 15. VI– 15.VIII.1991, malaise trap, Darling & Rosichon, OSUC 247938 (deposited in MBBJ). Paratypes: (5 females, 10 males) INDONESIA: 2 females, 8 males, OSUC 228695, 247818, 247824, 247955-247956 (MBBJ); OSUC 247825, 247829, 247937, 247964, 257060 (ROME). MALAYSIA: 3 females, 2 males, OSUC 376583 (BMNH); OSUC 463990 (CNCI); OSUC 453799, 453803, 453806 (OSUC).