Dryinus priscus Olmi

Olmi, Massimo, Guglielmino, Adalgisa & Vollaro, Massimo, 2011, Revision of fossil species of Dryinus belonging to constans group, with description of a new species (Hymenoptera: Dryinidae), Zootaxa 2981, pp. 43-55 : 50-51

Dryinus priscus Olmi

( Figs 4 B, 5A)

Dryinus priscus Olmi 1998: 77 .

Dryinus priscus Olmi: Olmi & Bechly 2001 : 50.

Type material. HOLOTYPE, Ƥ, Lower/Middle Miocene amber from Dominican Republic (16 mybp) ( AMNH; No. DR-14-341).

Diagnosis. Female of Dryinus with pronotal tubercle reaching tegula, notauli incomplete, fore wing with a dark spot beneath pterostigma. Male unknown.

Redescription. Female: macropterous; length 4.0 mm. Colour apparently testaceous, except petiole black and scutellum apparently black or brown. Antenna 10-segmented, short and slender, apparently glabrous, weakly thickened distally; antennal rhinaria present on segments 5–10; antennal segments in following proportions: 9:5:20:19:23:27:20:15:10:12; antenna more than six times as long as head (length of head dorsally measured from occipital carina behind ocelli to distal apex of mandible): 160:26; head weakly convex, apparently dull and granulated; clypeus rounded, with anterior margin not bidentate; mandible hardly distinct (number of teeth not distinct); occipital carina complete, laterally not reaching eyes; occiput excavated; eye normally bulging; POL = 5; OL = 2.5; OOL = 10; OPL = 2; TL = 3; frontal line absent. Maxillary palpi 6-segmented. Labial palpi 3-segmented. Pronotum crossed by anterior strong transverse impression between anterior collar and disc; disc humped; posterior collar very short; pronotum apparently dull, granulated, apparently shorter than head (15:26); pronotal tubercle reaching tegula. Scutum apparently dull and granulated, approximately as long as pronotum (16:15). Notauli incomplete, reaching approximately 0,7 length of scutum. Scutellum shorter than scutum (8:16), with sculpture not distinct. Metanotum shorter than scutellum (4:8), with sculpture not distinct. Propodeum slightly longer than scutum (20:16), reticulate rugose; propodeal areolae not distinct; posterior surface of propodeum apparently with two longitudinal keels; sculpture of median area not distinct; posterior surface of propodeum shorter than dorsal surface (6:14). Shape of pronotum, scutum, scutellum, metanotum and propodeum usual for Dryininae . Fore wing with a dark spot beneath pterostigma, with usual venation of Dryininae ; pterostigma narrow, much longer than broad (23:5); marginal cell open; distal part of stigmal vein much longer than proximal part (21:11); stigmal vein not S - shaped, forming angle between proximal and distal parts; fore wing with usual three basal cells clearly enclosed by pigmented veins (costal, median and submedian cells). Hind wing apparently hyaline, without dark transverse bands; hind wing shape usual for Dryininae . Fore leg segments in following proportions: 19 (coxa): 20 (trochanter): 45 (femur): 30 (tibia): 11 (tarsal segment 1): 4 (tarsal segment 2): 6 (tarsal segment 3): 21 (tarsal segment 4): 31 (tarsal segment 5); enlarged claw slightly shorter than segment 5 of protarsus (27:31); protrochanter slender and long, with long proximal stalk, broadened more proximally than half-way; protrochanter approximately five times as long as broad (20:4)(greatest breadth measured on distal club); segments 2 and 3 of protarsus produced into hooks; rudimentary claw present; arolium much shorter than enlarged claw (3:27); enlarged claw apparently with one subapical tooth and one row of numerous lamellae (number of lamellae not distinct); subapical tooth of enlarged claw apparently small; distal apex of enlarged claw apparently spatulate. Segment 5 of protarsus with numerous lamellae (number of rows of lamellae not distinct); distal apex with a group of lamellae (number of lamellae not distinct). Midleg segments in following proportions: 11 (coxa): 6 (trochanter): 41 (femur): 41 (tibia): 24 (tarsal segment 1): 9 (tarsal segment 2): 7 (tarsal segment 3): 4 (tarsal segment 4): 7.5 (tarsal segment 5). Hindleg segments in following proportions: 16 (coxa): 6 (trochanter): 50 (femur): 56 (tibia): 28 (tarsal segment 1): 7 (tarsal segment 2): 6 (tarsal segment 3): 6 (tarsal segment 4): 4 (tarsal segment 5). Petiole shape and length usual for Dryininae . Shape, length and breadth of wings usual for Dryininae . Shape of body usual for Dryininae . Tibial spurs 1/1/2.

Male: unknown.

Hosts. Unknown.

Figures

FIGURE 4. A. Dryinus palaeodominicanus, chela of holotype. B. D. priscus, holotype Ƥ. Length 4.0 mm.