Odontacolus kiau, 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 : 45-46

Odontacolus kiau sp. n. Figures 59, 191-196; Morphbank 69

Description.

Female. Body length: 1.68 mm (n=1). Antenna color: completely yellow. Body color: completely dark brown. Coxae color: dark brown. Leg color (excluding coxae): honey 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: largely smooth ventrally, dorsally with sinuate, transverse ridges.Surface of torular triangle: flat. Development of central keel on frons: present, short (less than 1/3 of frons height). Sculpture on upper frons below anterior ocellus: with sparse, transverse costae mixed with weak, dense granulae. Sculpture of malar space: weakly rugulose throughout, without fan-like striae. Furrow at lateral portion of antennal scrobe: absent. Mesal surface of vertex: flat to weakly convex. Size of lateral ocelli: large. 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: simply arcuate medially. Sculpture of occiput: with weakly rugulo aciculate sculpture. Sculpture of gena: granulose.

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), well-defined foveae. Sculpture of pronotal lateral area: coriaceous. Netrion: present, smooth, well developed, sub-obovate. Notaulus: present, simple. Length of notaulus: approximately less than or equal to 1/3 of length of mesoscutum. Width of notaulus: narrow (notaulus width less than or equal to half the width of tegula). Sculpture of mesoscutum: weakly rugulose mixed with weak granulae. Sculpture of mesoscutellum: granulose. Mesoscutellar profile: elevated, anterior margin higher than posterior. Mesoscutellar shape: flat, not depressed. Lateral propodeal area: densely, finely rugulose. Shape of propodeal anterior spine: short, broad, apex rounded. 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: densely longitudinally costate across entire width. Metapleural sculpture: mainly with weak coriaceous sculpture, lower 1/3 without longitudinal costae.

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

Metasoma. Shape of T1 horn: narrow, elongate. 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: present, well-defined. Sculpture of T2: longitudinally costate on weak coriaceous background. Sculpture of T3: weakly coriaceous. Sculpture of S3-S6: S3 weakly granulose, S4-S6 weakly, finely coriaceous. S2 anterior carina: absent.

Male. Unknown.

Diagnosis.

Odontacolus kiau is very similar to Odontacolus whitfieldi , but the former lacks an anterior transverse carina on S2; Odontacolus whitfieldi has this carina complete and cristate. Thesespecies belong to a group that have short, smooth notauli, a well-defined netrion, a central keel on the frons, and the sculpture of the frons always has transverse costae. Additionally, Odontacolus kiau can be separated from Odontacolus mayri by the dark brown coxae and the slightly bulging torular triangle observed on the former; in Odontacolus mayri the coxae are yellow and the torular triangle is flat.

Etymology.

This species is named after the East New Britain word ‘kiau’ (in Kuanua language) which means ‘egg’, and refers to the stage of the host parasitized by Odontacolus . The name is used as a noun in apposition.

Link to distribution map.

70

Material examined.

Holotype female: PAPUA NEW GUINEA: East New Britain Prov., DPI base camp, Baining Mountains, 04°26.36'S, 151°49.02'E, 28. X– 11.XI.1999, flight intercept trap, A. Mararuai & M. Kalamen, OSUC 239159 (deposited in CNCI).

Comments.

The holotype is in perfect condition.