Oxyscelio hamorum 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 II: the Australian and southwest Pacific fauna, ZooKeys 331, pp. 1-266 : 95-97

Oxyscelio hamorum Burks sp. n. Figures 133-136; Morphbank53

Description.

Female. Body length 3.2-3.45 mm (n=5).

Radicle color and shade: same as scape, both dark brown. Pedicel color: same as scape. A3: shorter than pedicel. A4: broader than long. A5: broader than long.

Ventral clypeal margin: with slightly convex median lobe. Interantennal process: not elongate. Lower frons at dorsal margin of interantennal process: without transverse carina. Transverse curved rugae extending from frontal depression to eye: absent. Median longitudinal carina in frontal depression: absent. Ventral portion of frontal depression: smooth. Dorsal portion of frontal depression: without transverse carinae. Submedian carina: present only as a weak shift in elevation. Frontal depression dorsally: not hood-like, open dorsally. Upper frons major sculpture: umbilicate foveate; irregularly rugose. Upper frons microsculpture: absent. Hyperoccipital carina: absent. Carina connecting occipital carina to hyperoccipital carina: absent. Occipital carina: present laterally, absent medially. Occiput sculpture: transversely rugose. Extra carina ventral to occipital carina: absent. Gena length: shorter than eye. Major sculpture of gena anteroventrally: umbilicate foveate. Major sculpture of gena posteroventrally: umbilicate foveate; umbilicate punctate; absent. Microsculpture of gena anteroventrally: absent. Microsculpture of gena posteroventrally: absent.

Lateral pronotal area sculpture: anteriorly smooth, posterodorsal corner with dense microsculpture, ventral corner with irregular carinae. Posterior border of central pronotal area: directed anteriorly, protruding at corner of epomial carina and transverse pronotal carina. Mesoscutum anteriorly: very steep and tall, descending at a right angle or protruding anteriorly. Major sculpture of mesoscutal midlobe anteriorly: umbilicate foveate. Mesoscutal midlobe sculpture at midlength: with large smooth areas. Major sculpture of mesoscutal midlobe posteriorly: umbilicate foveate. Microsculpture of mesoscutal midlobe anteriorly: absent. Microsculpture of mesoscutal midlobe posteriorly: absent. Median mesoscutal carina: present as a vague, occasionally interrupted elevation. Major sculpture of mesoscutellum centrally: absent. Major sculpture of mesoscutellum peripherally: umbilicate foveate. Microsculpture of mesoscutellum centrally: absent. Microsculpture of mesoscutellum peripherally: absent. Mesoscutellar rim: not expanded. Mesoscutellar rim medially: without notch. Mesofemoral depression: with slight, indistinct sculpture dorsally, smooth ventrally. Metascutellum shape: deeply emarginate, with the resulting pair of posterior processes subtriangular and directed dorsally. Metascutellar setae: absent. Metascutellum sculpture: with large smooth posterior fovea. Postmarginal vein: absent. Fore wing apex at rest: exceeding metasomal apex. Coxae color brightness: same color as femora. Spines along tibiae: present. Lateral propodeal carinae: broadly separated, but parallel for a short distance anteriorly. Setae in metasomal depression: absent. Anterior sculpture of metasomal depression: with median areole or pair of pits. Median propodeal carina: present.

T1 horn: absent. Number of longitudinal carinae of T1 midlobe: 3. T1 lateral carina: protruding laterally, visible from ventral view. T2 sculpture: densely foveolate, longitudinal sculpture irregular. T2 sublateral longitudinal foveae: absent. T3 metasomal flanges: absent. T4 sculpture: densely foveate, longitudinal sculpture irregular. T4 metasomal flanges: absent. T5 sculpture: densely foveate, interspaces not raised. T5 metasomal flanges: absent. T6: broader than long. Major sculpture of T6: umbilicate punctate. Microsculpture of T6: absent. T6 medially: with medially truncate emargination, sloping down to apical rim. T6 metasomal flanges: absent. T6 raised peripheral rim: absent. S4 sculpture: sparsely foveolate, with tiny pits in interspaces. S5 sculpture: sparsely foveate, with tiny pits in interspaces. S5 median carina: absent. S6 peripheral carina: absent. S6 apex in relation to T6: not exposed to dorsal view. S6 apex: rounded or acuminate.

Male. unknown.

Diagnosis.

Both sexes: Body entirely dark brown, including antennae and legs. Frontal depression shallow and very broad, transverse carinae weakly indicated above dorsal separator; submedian carina indicated by ruga. Hyperoccipital carina indicated by rugae. Occipital carina complete, sinuate or omicron-shaped medially. Metascutellum deeply concave, emarginate or truncate apically, projecting dorsally. Tibiae with flattened spines. T1 lateral carina expanded laterally. Metasomal sterna with few or no longitudinal rugae. Female: A3 much shorter than pedicel. A4, A5 broader than long. T1 midlobe with 4 longitudinal carinae. T6 without metasomal flanges. Fore wing long enough to reach beyond metasomal apex. Main body of T6 concave apically. Oxyscelio hamorum is very similar to Oxyscelio uncinorum , but has a broader frontal depression with some dorsal carinae, and has a much shorter A3. Both of these species have entirely dark brown bodies and tibial spines, but Oxyscelio hamorum resembles Oxyscelio sordes in other ways, which Oxyscelio uncinorum bears more resemblance to Oxyscelio nitoris .

Etymology.

Latin noun, genitive case, meaning "the barb of an arrow."

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=307082]

Associations.

Collected on Eucalyptus stellulata Sieber: [ Myrtales : Myrtaceae ]

Material examined.

Holotype, female: AUSTRALIA: TAS, 1km NE Herrick, 41°06'S, 147°53'E, 29. I– 30.I.1983, I. D. Naumann & J. C. Cardale, OSUC 359626 (deposited in ANIC). Paratypes: AUSTRALIA: 4 females, OSUC 359623-359625 (ANIC); OSUC 462591 (CNCI).