Odontacolus lamarcki, 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 : 46-47

Odontacolus lamarcki sp. n. Figures 45, 66, 197-202; Morphbank 71

Description.

Female. Body length: 1.19 mm (n=1). Antenna color: completely yellow. Body color: head and metasoma honey yellow except for T1 horn which is darker than remainder of metasoma color, mesosoma yellow. Coxae color: whitish 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: largely smooth ventrally, dorsally with sinuate, transverse ridges. Surface of torular triangle: slightly bulging. Development of central keel on frons: completely absent. Sculpture on upper frons below anterior ocellus: granulose throughout. Sculpture of malar space: granulose throughout. 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: simply arcuate medially. Sculpture of occiput: with weak, small granulae. 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), weakly defined foveae. Sculpture of pronotal lateral area: upper 1/3 granulose, lower 1/3 with transverse foveae, otherwise smooth. 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: 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: elongate, narrow, 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 half width. Metapleural sculpture: largely smooth except lower half with longitudinal carinae.

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: present, well-defined. Sculpture of T2: largely weakly coriaceous mixed with longitudinal costae, meson coriaceous. Sculpture of T3: smooth mesally, otherwise weakly coriaceous. Sculpture of S3-S6: finely, weakly coriaceous. S2 anterior carina: present, cristate, uninterrupted.

Male. Unknown.

Diagnosis.

Along with Odontacolus wallacei this is the only other species without a medial facial keel in combination with a well-defined netrion, and the occipital carina being separated from the orbital carina. Odontacolus lamarcki can be separated from Odontacolus wallacei by the short distance between the occipital carina and the lateral ocellus (approximately less than or equal to 0.6 × ocellus diameter); in Odontacolus wallacei the distance between the occipital carina and the lateral ocellus is approximately equal to or greater than 1.2 ×.

Etymology.

This species is named after the great French zoologist Jean-Baptiste Lamarck. The epithet is a noun in the genitive case.

Link to distribution map.

72

Material examined.

Holotype female: THAILAND: Phetchabun Prov., mixed deciduous forest, T1398, Khao Kho National Park, 16°39.589'N, 101°08.185'E, 168m, 19. I– 26.I.2007, Malaise trap, S. Chachumnan & S. Singtong, OSUC 339597 (deposited in QSBG).

Comments.

The holotype specimen is in good condition.