Oxyscelio atricoxa (Dodd)

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 : 27-29

Oxyscelio atricoxa (Dodd) Figures 11-14; Morphbank28

Sceliomorpha atricoxa Dodd, 1914: 104 (original description); Kieffer 1926: 303, 308 (description, keyed); Naumann et al. 1994: 71 (holotype transferred to ANIC).

Oxyscelio atricoxa (Dodd): Dodd 1931: 74 (generic transfer); Galloway 1976: 99 (type information).

Description.

Female. Body length 3.55-8.7 mm (n=20).

Radicle color and shade: darker than scape. Pedicel color: same as scape. A3: longer than pedicel. A4: longer than broad. A5: longer than broad; as long as broad.

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: with medially interrupted 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. Upper frons microsculpture: granulate. Hyperoccipital carina: absent. Carina connecting occipital carina to hyperoccipital carina: absent. Occipital carina: weakly arched dorsally, with rounded lateral corners. Occiput sculpture: umbilicate foveate. 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; rugose. Microsculpture of gena anteroventrally: absent. Microsculpture of gena posteroventrally: granulate.

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: not different from nearby sculpture. Major sculpture of mesoscutal midlobe posteriorly: umbilicate foveate; longitudinally rugose. Microsculpture of mesoscutal midlobe anteriorly: granulate. Microsculpture of mesoscutal midlobe posteriorly: absent. Median mesoscutal carina: present as a vague, occasionally interrupted elevation. Major sculpture of mesoscutellum centrally: umbilicate foveate. 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: longitudinally striate dorsally, smooth ventrally. Metascutellum shape: slightly emarginate posteriorly, concave but elevated posteriorly. Metascutellar setae: absent. Metascutellum sculpture: with large smooth posterior fovea. Postmarginal vein: absent. Fore wing apex at rest: reaching near apex of T5; reaching middle of T6. Coxae color brightness: darker than femora. Spines along tibiae: absent. Lateral propodeal carinae: broadly separated, not parallel anteriorly. Setae in metasomal depression: absent. Anterior sculpture of metasomal depression: absent. Median propodeal carina: absent.

T1 horn: absent. Number of longitudinal carinae of T1 midlobe: 5. 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: longitudinally striate to rugose, setal pits spanning interspaces. T4 metasomal flanges: absent. T5 sculpture: longitudinally striate to rugose, setal pits spanning interspaces. T5 metasomal flanges: absent. T6: broader than long. Major sculpture of T6: umbilicate foveate. Microsculpture of T6: absent. T6 medially: flat and tapering to a rounded apex, not separated from apical rim. T6 metasomal flanges: absent. T6 raised peripheral rim: absent. S4 sculpture: longitudinally striate or rugose, setal pits spanning interspaces. S5 sculpture: longitudinally striate to rugose, setal pits spanning 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: Frontal depression shallow, not parallel-sided, many interrupted transverse carinae present, including some above dorsal separator; submedian carina weakly indicated but complete. Hyperoccipital carina indicated by weak rugae. Occipital carina complete, weakly convex medially. Metascutellum deeply concave, emarginate apically, projecting dorsally. Postmarginal vein absent. Coxa darker than rest of leg. T1 lateral carina expanded laterally. Metasomal flanges absent. Female only: A3 much longer than pedicel. A4 longer than broad, A5 nearly as long as broad. Mesoscutellum without granulate sculpture. T1 midlobe with 4 longitudinal carinae or with raised sculpture obscuring them. T6 without metasomal flanges, main body of tergum not separated from apical rim. Fore wing long enough to reach middle of T5 or middle of T6. Oxyscelio atricoxa can be distinguished from Oxyscelio conjuncti mainly in having a shallower frontal depression, finer and denser mesoscutal and mesoscutellar foveae, and by the shape of T6. Males are unknown, but likely differ from those of Oxyscelio conjuncti mostly in depth of the frontal depression.

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=5006]

Material examined.

Holotype, female, S. atricoxa: AUSTRALIA: NSW, Sydney, Elizabeth Bay, no date, ANIC DB 32-012551 (deposited in ANIC). Other material: AUSTRALIA: 67 females, OSUC 429912-429917, 429919 (ANIC); OSUC 462560 (CNCI); OSUC 281687-281688, 309399 (OSUC); QDPC 0-165655, 0-165726, 0-165754 (QDPC); OSUC 429918 (QMBA); OSUC 437012 (UQIC); OSUC 429876-429911, 429920-429921, 448968-448980 (WINC).