Dinotrema caudatulum (Fischer, 1969)

Peris-Felipo, Frаncisco Jаvier & Belokobylskij, Sergey А., 2018, Revision of the New World species of the genus Dinotrema (Hymenoptera: Braconidae: Alysiinae), Zootaxa 4382 (1), pp. 1-55 : 8-11

Dinotrema caudatulum (Fischer, 1969)

( Figs 5 , 6 )

Aspilota caudatula Fischer 1969b: 247 ; Shenefelt 1974: 969; Marsh 1979: 220; Yu et al. 2012. Dinotrema caudatulum: Peris-Felipo and Belokobylskij 2016b: 3 .

Material examined. 1 female (paratype), " U.S.А., Thomasville, Ga., 12.iv.1932, No. 31945, ex Laspeyresia caryana, H. Spencer and L. Brown leg." ( NHMW) ; 1 male (paratype), " U.S. А, Colo., 1547, Collection C.F. Baker" ( NHMW) .

Redescription. Female. Body 1.6 mm; fore wing 1.8 mm; hind wing 1.2 mm.

Head. In dorsal view, 1.9 × as wide as median length, 1.5 × as wide as mesoscutum, smooth. Eye in lateral view 1.1 × as wide as temple medially. POL 1.1 × OD; OOL 2.8 × OD. Face 1.5 × as wide as high. Clypeus 2.7 × as wide as high. Paraclypeal fovea reaching halfway distance between clypeus and eye. Mandible as long as its maximum width, weakly widened towards apex. Upper tooth rather wide, longer than lower tooth; middle tooth shorter than upper tooth, small, pointed apically; lower tooth short, subrounded. Аntenna 17-segmented. First flagellar segment 3.0 × as long as its apical width. Second segments 1.7 × as long as its maximum width; third to 14th segments 1.3–1.4 times, and 15th (apical) segment 2.2 × as long as wide respectively.

Mesosoma. In lateral view 1.3 × as long as high. Mesoscutum (in dorsal view) as long as its maximum width. Notauli mainly absent on horizontal surface of mesoscutum. Mesoscutal pit present, oval. Prescutellar depression (scutellar sulcus) with distinct median and without lateral carinae. Precoxal sulcus present, crenulated, not reaching anterior and posterior margins of mesopleuron. Posterior mesopleural furrow smooth. Propodeum sculptured, without complete median longitudinal carinae. Propodeal spiracles small, its diameter 0.3 × as wide as distance from spiracle to anterior margin of propodeum.

Leg. Hind femur 3.5 × as long as its maximum width.

Wings. Radial (marginal) cell 3.7 × as long as its maximum width. Vein r2 (3-SR) 2.2 × as long as vein cuqu1 (2-SR); vein r3 (SR1) 2.7 × as long as vein r2 (3-SR).

Metasoma. First tergite weakly widened towards apex, 1.5 × as long as its apical width, smooth. Ovipositor 1.1 × as long as first tergite, clearly shorter than metasoma, about as long as hind femur.

Colour. Body, antenna, and pterostigma brown to dark brown. Mandible and legs light brown. Wings hyaline.

Male. Body 1.6 mm; fore wing 1.8 mm; hind wing 1.4 mm. Аntenna 21-segmented. First flagellar segment 2.9 × as long as its apical width. Second and 19th segments 2.2–2.4 × as long as their maximum width. Hind femur 3.6 × as long as its maximum width. Otherwise similar to female.

Comparative diagnosis. This species is similar to D. communis (Fischer, 1969) , but differs from it in having the hind femur 3.5 × as long as its maximum width (3.9 × in D. communis ), first metasomal tergite 1.5 × as long as its apical width (1.8 × in D. communis ), mandible as long as its maximum width (1.3 × in D. communis ), clypeus 2.7 × as wide as high (2.1 × in D. communis ), mesoscutal pit oval (elongate in D. communis ), and prescutellar depression (scutellar sulcus) without lateral carinae (with lateral carinae in D. communis ).

Figures

FIGURE 5. Dinotrema caudatulum (Fischer, 1969) (A, C–F—female, B—male, paratypes). A, B. Habitus, lateral view. C. Mandible.D. Antenna. E. Face, fronta view. F. Head and mesosoma, lateral view.

FIGURE 6. Dinotrema caudatulum (Fischer, 1969) (female, paratype).A. Head and mesonotum, dorsal view. B. Propodeum, dorsal view. C. First metasomal tergite, dorsal view. D. Hind leg, metasoma and ovipositor, lateral view. E. Fore and hind wings.