Odontacolus hackeri (Dodd)

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 : 36-37

Odontacolus hackeri (Dodd) Figures 155-160; Morphbank 57

Ceratobaeoides hackeri Dodd 1913: 337 (original description); Dodd 1914a: 66 (description); Kieffer 1926: 273 (description, keyed).

Odontacolus hackeri (Dodd): Austin 1981: 89 (generic transfer, type information).

Description.

Female. Body length: 1.75 mm (n=1). Antenna color: completely dark brown. Body color: head and metasoma honey yellow except for T1 horn which is darker than remainder of metasoma color, mesosoma 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 moderately short and strongly narrowed towards mouth, head appearing short and broad. Sculpture of antennal scrobe: weakly rugulose throughout. 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: coriaceous throughout. 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: normal. Lagrimal: absent or minute. Distance from occipital carina to orbital carina: slightly greater than width of occipital carina. Shape of occipital carina: simply arcuate medially. Sculpture of gena: granulose.

Mesosoma. Sculpture of pronotal lateral area: upper 1/3 granulose, lower 1/3 with transverse foveae, otherwise smooth. Netrion: present, smooth, linear. 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: weakly rugulose mixed with granulate sculpture. Mesoscutellar shape: flat, not depressed. Lateral propodeal area: sparsely transversely carinate. Shape of propodeal anterior spine: short, broad, apex rounded. 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: 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: transversely carinate. Lateral carinae on T2: present, well-defined. S2 anterior carina: present, cristate, interrupted medially.

Male. Unknown.

Diagnosis.

Odontacolus hackeri can be distinguished from all other Australian Odontacolus species by the short, smooth notauli; a well-defined netrion; a central keel being present, sculptured antennal scrobe; a short, broad T1 horn which has conspicuously transverse carinae on its posterior face; and by the flat vertex.

Link to distribution map.

58

Material examined.

Holotype female, Ceratobaeoides hackeri : AUSTRALIA: QLD, among undergrowth, Brisbane, 26.IV.1913, H. Hacker, QMBA HY1630 (deposited in QMBA).

Comments.

The holotype is slide mounted and partly destroyed (Figs 155-160).