Orasema taii, Chien & Heraty, 2018

Chien, Iris & Heraty, John M., 2018, Come and Gone: Description of a New Species of Eucharitidae (Hymenoptera) Attacking Solenopsis (Hymenoptera: Formicidae) in Texas, Insect Systematics and Diversity 2 (1), pp. 1-7 : 2

publication ID

https://doi.org/ 10.1093/isd/ixx012

publication LSID

lsid:zoobank.org:pub:F0E644BE-548F-4BB3-9DCA-B7886A3F4012

persistent identifier

https://treatment.plazi.org/id/DA294E6D-76C6-4BFC-AFCE-D8EDECBF4C53

taxon LSID

lsid:zoobank.org:act:DA294E6D-76C6-4BFC-AFCE-D8EDECBF4C53

treatment provided by

Felipe

scientific name

Orasema taii
status

sp. nov.

Orasema taii n. sp.

( Figs 1–23 View Figs View Figs View Figs View Figs ) (http://zoobank.org/ urn:lsid:zoobank.org:act:DA294E6D-76C6-4BFC-AFCE-D8EDECBF4C53 )

Diagnosis

Species in the bakeri group are recognized by having seven funicular segments, the prepectus without a carina along the anterior margin, the femora are mostly dark brown, and the petiole in females is only slightly longer than broad (in males up to 2.5× as long as broad). The new species is distinguished from other members of the group ( O. bakeri Gahan , Orasema texana Gahan ) by the following combination of features: clava with a distinct ventral notch separating two apical clavomeres; mesoscutellar disc between frenal line and axillae distinctly longer than broad and with a central median channel that is a more coppery colored than the surrounding dark blue–green frenum; and petiole with a weak anterior carina, no lateral carina, and strongly rugose. The clava is a single completely fused structure in all other bakeri -group species. O. bakeri has reticulate sculpture on the dorsal surface of the petiole, whereas O. taii has areolate-reticulate sculpture ( Fig. 12 View Figs ). O. texana Gahan has the mesoscutellar disc between the frenal line and axillae at most as long as broad, scabriculous (not evenly fine reticulate) sculpture dorsally, petiole with dorsal surface relatively flat and reticulate, and in females, it has a prominent dorsolateral carinae that extends the full length of the petiole.

Female: Length 2.37–3.05 mm.

Color:

Head and mesosoma blue green, mesosoma more greenish dorsally and mostly dark blue laterally ( Figs. 10 and 11 View Figs ). Scape pale brown; pedicel brown; anellus yellowish brown; flagellum dark brown. Mandible, maxilla, and labium dark brown. Coxae dark blue; femora mostly dark brown to black, tips pale; tibiae yellow. Fore wing hyaline; venation pale brown. Petiole dark blue; gaster brown.

Head:

Head in frontal view subtriangular ( Fig. 3 View Figs ); 1.14–1.26× broader than high; face reticulate. Occiput strigate, shallowly emarginate in dorsal view, dorsal margin abrupt; temple present, rounded. Scrobal depression shallow, laterally rounded, reticulate, dorsal scrobal depressions absent; longitudinal groove between eye and torulus absent; eye sparsely setose, appearing bare; interocular distance 1.59–1.88× eye height; malar space 0.74–0.96× eye height; malar depression weakly impressed between mouth and eye margin; supraclypeal area about as long as broad, shorter than clypeus, weakly sculptured; clypeus strongly sculptured; epistomal sulcus narrow but shallow; anterior tentorial pits shallow; anteclypeus distinct, straight. Labrum with four digits ( Fig. 3 View Figs ). Mandibular formula 3:2 ( Figs. 3 View Figs and 9 View Figs ); palpal formula 3:2. Scape not reaching median ocellus. Pedicel small and globose. Flagellum with seven funicular segments ( Fig. 1, F2–8 View Figs View Figs ); flagellum length 0.96–1.1× head height; anellus disc-shaped; F2 1–1.33× as long as broad, 0.85–1.06× as long as F3; following funicular segments subequal in length, equal in width; clava subconical, with notch ventrally between first and second subsegments.

Mesosoma :

Mesosoma 1.08–1.23× as long as high ( Figs. 4 View Figs and 10 View Figs ). Mesoscutal midlobe reticulate medially to rugose-reticulate laterally, with minute setae; lateral lobe strigose medially, to longitudinally reticulate laterally; notaulus deep ( Fig. 11 View Figs , not). Axilla reticulate medially to rugose-reticulate laterally, dorsally elevated well above scutellum ( Figs. 4 View Figs and 10 View Figs ); scutoscutellar sulcus narrow, regularly foveate, extending to transscutal articulation medially, axilla broadly divided ( Fig. 11 View Figs , ax); scutellar disc slightly longer than broad, finely reticulate medially; frenal line reticulate; frenum reticulate; axillular sulcus anteriorly narrow, broad and foveate posteriorly; axillula reticulate. Propodeal disc broadly rounded, areolate-reticulate, without median carina ( Fig. 5 View Figs ); callus areolate-reticulate, bare; callar nib absent. Prepectus areolate-reticulate, triangular dorsally, strongly narrowed ventrally ( Figs. 4 View Figs and 10 View Figs ). Mesepisternum reticulate laterally, becoming smooth to areolate-reticulate ventrally, broadly rounded anterior to mesocoxa. Upper mesepimeron weakly reticulate; lower mesepimeron areolate-reticulate; transepimeral sulcus weakly impressed. Metepisternum laterally reticulate anteriorly, areolate-reticulate posteriorly. Propleuron convex, weakly reticulate. Postpectal carina prominent. Metacoxa 1.68–1.92× as long as broad and reticulate dorsally, becoming smooth ventrally; metafemur 4.4–5.6× as long as broad, with even cover of short, dense setae; metatibia sparsely setose. Fore wing ( Fig. 13 View Figs ) 2.25–2.9× as long as broad, 2.36–2.87× as long as mesothorax; basal cell and speculum bare, costal cell sparsely setose, wing disc moderately setose; marginal fringe relatively long; submarginal vein bare; marginal vein with minute setae; stigmal vein about the same length as postmarginal vein, slightly angled distally; uncus absent; stigma with three clustered sensilla in a straight line and a fourth separated ( Fig. 13 View Figs , inset); postmarginal vein 5.0–7.2× as long as stigmal vein. Hind wing costal cell with a broad bare area.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Eucharitidae

Genus

Orasema

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF