Oxyscelio zeuctomesos 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 : 226-228

Oxyscelio zeuctomesos Burks sp. n. Figures 434-439Morphbank113

Description.

Female. Body length 3.85-4.4 mm (n=5).

Radicle color: same color as scape. Scape color: Yellowish. A4: longer than broad. A5: longer than broad; as long as broad. 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: weak, shallow and rounded or formed by ledge. Submedian carina medially: without 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; 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. Hyperoccipital carina: indicated by rugae. Lateral connection between hyperoccipital and occipital carinae: absent. Area between vertex and occipital carina: umbilicate-foveate. Occipital carina medially: divided into concave halves, meeting at 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: present. Major sculpture of medial mesoscutum anteriorly: umbilicate-foveate. Major sculpture of medial mesoscutum posteriorly: umbilicate-foveate; irregularly 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: 4. Number of carinae crossing femoral depression: 3-5. 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: smooth. Metasomal depression setae: absent. Lateral propodeal carinae anteromedially: weakly diverging. Anterior areoles of metasomal depression: absent. Anterior longitudinal carinae in metasomal depression: absent. Lateral propodeal areas: meeting for most of propodeal length as part of a raised structure. Postmarginal vein: absent. Fore wing apex: reaching middle of T5.

T1 midlobe: with 5 longitudinal carinae. T1: without anterior bulge. T2: with long sublateral depressions. T6: broader than long; as long as broad. Apical flange of T6: not exposed apically. Metasomal apex: tapering to a sharp point. Major sculpture of T6: umbilicate-punctate. Microsculpture of T6: absent; granulate.

Male. Body length 4.05 mm (n=2). A5 tyloid: carina-like, not expanded. A11: longer than broad. Median tooth of frontal depression: absent. Median lobe of T1: with 5 longitudinal carinae. Metasomal apex: with no distinct corners.

Diagnosis. Both sexes: Mesoscutellum without granulate sculpture. Metascutellum rounded, slightly expanded apically. Propodeum forming a roughly sculptured arch over the base of T1. Female: A4 longer than broad, A5 as long or longer than broad. T1 midlobe with 5 longitudinal carinae. T2 with sublateral depressions. T6 strongly tapering to a narrow point. Male: A11 as broad or slightly broader than long. T1 midlobe with 5 longitudinal carinae. T7 with rounded posterolateral corners.

Etymology.

Compound noun based on Greek, meaning "joined middle." Refers to the arch formed by the propodeum over the base of T1.

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=275488]

Material examined.

Holotype, female: INDONESIA: Sulawesi Utara Prov., Toraut, Bogani Nani Wartabone (Dumoga-Bone) National Park, 220m, 9. V– 16.V.1985, J. S. Noyes, OSUC 369294 (deposited in BMNH). Paratypes:INDONESIA: 3 females, 2 males, OSUC 369227, 369285 (CNCI); OSUC 369271, 369306 (OSUC); OSUC 442264 (WINC).

Comments.

Oxyscelio zeuctomesos and Oxyscelio cyrtomesos form a species complex within the fossarum-group. They differ from most members of that group in that males do not have the T2 sublateral depressions.