Oxyscelio mystacis 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 : 132-134

Oxyscelio mystacis Burks sp. n. Figures 199-202; Morphbank66

Description.

Female. Body length 4.35-4.6 mm (n=3).

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

Ventral clypeal margin: with slightly convex median lobe. Interantennal process: not elongate. Lower frons at dorsal margin of interantennal process: with oblique carina extending towards mouth corner. Transverse curved rugae extending from frontal depression to eye: absent. Median longitudinal carina in frontal depression: absent. Ventral portion of frontal depression: with medially interrupted transverse carinae. 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: granulate. Hyperoccipital carina: indicated by a set of irregular elevations. Carina connecting occipital carina to hyperoccipital carina: absent. Occipital carina: present laterally, absent medially. 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. Microsculpture of gena anteroventrally: absent. Microsculpture of gena posteroventrally: absent.

Lateral pronotal area sculpture: mostly granulate, 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: not steep, forming less than a right angle. 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. Microsculpture of mesoscutal midlobe anteriorly: granulate. Microsculpture of mesoscutal midlobe posteriorly: absent. Median mesoscutal carina: present as a flattened or rounded 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 and ventrally. Metascutellum shape: not emarginate, convex dorsally. Metascutellar setae: absent. Metascutellum sculpture: with a median carina, otherwise weakly sculptured. Postmarginal vein: present. Fore wing apex at rest: not reaching base of T5. Coxae color brightness: same color as 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: present. Number of longitudinal carinae of T1 midlobe: obscured by other raised sculpture. T1 lateral carina: straight. T2 sculpture: with longitudinal striae or rugae, setiferous puncta present between them. 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: longer than broad. Major sculpture of T6: umbilicate punctate; longitudinally striate. Microsculpture of T6: granulate. 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. S 5 median carina: absent. S6 peripheral carina: absent. S6 apex in relation to T6: not exposed to dorsal view. S6 apex: rounded or acuminate.

Male.

Diagnosis.

Both sexes: Frontal depression nearly flat, transverse carinae absent; submedian carina indicated by a few weak rugae. Oblique carina extending from bottom of frontal depression towards lower margin of eye. Head directed downward. Hyperoccipital carina indicated by rugae. Occipital carina absent medially, with protruding lateral corners. Metascutellum narrow, slightly convex. Postmarginal vein present. Coxa not darker than rest of leg. T1 lateral carina not expanded laterally. Metasomal flanges absent. Female: A3 longer than pedicel. A4, A5 about as long as broad. Mesoscutellum without granulate sculpture. T1 midlobe carinae obscured by raised smooth area. Fore wing long enough to reach middle of T4. T6 longer than broad. Oxyscelio mystacis is very similar to the Philippine species Oxyscelio cupularis , and very different from other known mainland Australian species. It differs from Oxyscelio cupularis in having a convex metascutellum and less granulate sculpture.

Etymology.

New Latin noun, genitive case, meaning “moustache.”

Link to distribution map.

[http://hol.osu.edu/map-full.html?id=307090]

Material examined.

Holotype, female: AUSTRALIA: QLD, light trap 18, 15km WNW South Johnstone, 1986, light trap, Fay & Halfpapp, OSUC 368224 (deposited in QMBA). Paratypes: AUSTRALIA: 2 females, OSUC 227614, 227623 (CNCI).