Odontacolus mot, 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 : 54-56

Odontacolus mot sp. n. Figures 55, 227-232; Morphbank 81

Description.

Female. Body length: 1.92 mm (n=1). Antenna color: completely yellow. Body color: head, mesosoma, T1 (except horn), anterior portion of T2 yellow, metasoma otherwise dark brown. Coxae color: yellow. Leg color (excluding coxae): yellow. Fore wing color: completely hyaline.

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: present, elongate, reaching anterior ocellus. Sculpture on upper frons below anterior ocellus: covered by sinuate, transverse, fine costae. 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: present, well-defined but small (length less than 0.3 of malar sulcus length). Length of OOL: less than or equal to 1/3 × width of ocellus. Sculpture of vertex: granulate. Sculpture of occipital carina: largely simple, at most with sparse weak crenulae medially. 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), well-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: elevated, anterior margin higher than posterior. Mesoscutellar shape: flat, not depressed. Lateral propodeal area: densely, finely rugulose. 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: weakly coriaceous. Sculpture of upper 1/4 of mesopleuron: densely longitudinally costate across half width. Metapleural sculpture: mainly smooth, lower third sparsely longitudinally carinate.

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

Metasoma. Shape of T1 horn: narrow, 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: longitudinally costate, posterior margin smooth. Sculpture of T3: anterior two-thirds weakly longitudinally costate, posterior third weakly coriaceous mesally, otherwise densely granulose. Sculpture of S3-S6: S3 weakly granulose, S4-S6 weakly, finely coriaceous. S2 anterior carina: present, cristate, uninterrupted.

Male. Unknown.

Diagnosis.

This species is very similar to Odontacolus markadicus ; however, Odontacolus mot differs from it by the larger body size (1.92 mm vs. 1.74 mm or less), the broader transverse sinuate carinae on the upper frons (in Odontacolus markadicus the sculpturing is completely absent or if present then the carinae are thin and straighter than in Odontacolus mot ), and by the denser and less evenly distributed setae on the metasoma. Additionally, T2 in Odontacolus mot is more quadrate, while it is more elongate and less broad posteriorly in Odontacolus markadicus .

Etymology.

The name of this species is an arbitrary combination of letters and is used as a noun in apposition.

Link to distribution map.

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Material Examined.

Holotype female: INDIA: Tamil Nadu St., Coimbatore, 7.XI.1979, Boucek, OSUC 239205 (deposited in BMNH).

Comments.

The holotype is in perfect condition. The differences between Odontacolus mot and Odontacolus markadicus could be associated with the difference in body size. However, since Odontacolus mot also differs in metasomal setation and sculpture, we have chosen to treat them as separate species until additional material of Odontacolus mot is available.