Odontacolus irwini, A. Valerio, Alejandro, Austin, Andrew D., Masner, Lubomir & Johnson, Norman F., 2013

A. Valerio, Alejandro, Austin, Andrew D., Masner, Lubomir & Johnson, Norman F., 2013, Systematics of Old World Odontacolus Kieffer s. l. (Hymenoptera, Platygastridae s. l.): parasitoids of spider eggs, ZooKeys 314, pp. 1-151 : 42-43

Odontacolus irwini sp. n. Figures 16, 179-184; Morphbank 65

Description.

Female. Body length: 1.04 mm (n=1). Antenna color: completely yellow. Body color: head and mesosoma dark brown, metasoma honey yellow. Coxae color: yellow. Leg color (excluding coxae): yellow. Fore wing color: slightly infuscate throughout.

Head. Size of compound eye: approximately 1/2 × height of head. Head shape in lateral view: lower head elongate and broad at mouth, head appearing elongate and somewhat thin. Sculpture of antennal scrobe: weakly granulose throughout. Surface of torular triangle: slightly bulging. Development of central keel on frons: present, short (less than 1/3 of frons height). Sculpture on upper frons below anterior ocellus: granulose throughout. Sculpture of malar space: with weak rugulose sculpture mixed with granulate sculpture. Furrow at lateral portion of antennal scrobe: absent. Mesal surface of vertex: flat to weakly convex. Size of lateral ocelli: normal. Distance between lateral ocellus and occipital carina: 0.5 –1.2× maximum ocellar diameter. Lagrimal: absent or minute. Length of OOL: less than or equal to 1/3 × width of ocellus. Sculpture of vertex: granulate. Sculpture of occipital carina: weakly crenulate throughout. Distance from occipital carina to orbital carina: at least 2 × width of occipital carina. Shape of occipital carina: weakly sinuate medially. Sculpture of occiput: with weak, small granulae. Sculpture of gena: with weak rugulose sculpture and granulate background sculpture.

Mesosoma. Dorsal mesosoma in lateral view: convex. Sculpture of pronotal cervical area: with small (at most as large as crenulae on anterior edge of mesoscutum), weakly defined foveae. Sculpture of pronotal lateral area: largely smooth, dorsal margin with dense, weak punctulae. Netrion: present, smooth, well-developed, not looking linear. Notaulus: absent. Length of notaulus: not applicable, notauli absent. Width of notaulus: not applicable, notauli absent. Sculpture of mesoscutum: finely granulose. Sculpture of mesoscutellum: with weak, fine, granulate sculpture. Mesoscutellar profile: mainly flat, anterior and posterior edge at same height or nearly so. Mesoscutellar shape: flat, not depressed. Lateral propodeal area: longitudinally costate. Shape of propodeal anterior spine: short, broad, apex subtriangular. Sculpture of propodeum between anterior spines: smooth or largely smooth. Sculpture of ventral half of mesepisternum: smooth or nearly so. Sculpture of upper 1/4 of mesopleuron: smooth. Metapleural sculpture: smooth.

Wings. Stigmal vein: present, elongate, narrow. Campaniform sensilla at distal area of stigmal vein: present.

Metasoma. Shape of T1 horn: broad, short. Sculpture of upper portion of T1 horn: longitudinally carinate. Sculpture of posterior portion of T1 horn: largely smooth, with sparse longitudinal carinae. Lateral carinae on T2: absent. Sculpture of T2: meson and posterior margin smooth, otherwise longitudinally costate. Sculpture of T3: weakly coriaceous. Sculpture of S3-S6: mainly smooth, with sparse, setigerous punctulae. S2 anterior carina: absent.

Male. Unknown.

Diagnosis.

This species can be distinguished from Odontacolus veroae by the cicatrose sculpture on the posterior sublateral areas of the mesoscutum, the remainder of the sclerite having dense, weak, granulate sculpture; and the large body size (1.47-1.71 mm). Additionally, within the Fijian group of species, Odontacolus irwini can be separated from Odontacolus heratyi by the wider space between the occipital carina and the ocular carina, and from Odontacolus schlingeri by the convex mesosoma.

Etymology.

This species is named after the dipterist Dr Mike Irwin, who collected the type series. The epithet is a noun in the genitive case.

Link to distribution map.

66

Material examined.

Holotype female: FIJI: Western Div., Ba Prov., Viti Levu Isl., Eteni, FJ_11D, Navai, 17°37'S, 177°59'E, 700m, 24. X– 8.XI.2003, Malaise trap, M. Irwin, E. Schlinger & M. Tokota’a, FBA021030 (deposited in BPBM). Paratypes: FIJI: 3 females, FBA014433 (BPBM), FBA059072 (FNIC); FBA074688 (OSUC).

Comments.

The holotype is in perfect condition as are the paratypes.