Rasnichneumon gracilis, Kopylov & Zhang & Zhang, 2021

Kopylov, Dmitry S., Zhang, Qi & Zhang, Hai-Chun, 2021, The Darwin wasps (Hymenoptera: Ichneumonidae) of Burmese amber, Palaeoentomology 4 (6), pp. 592-603 : 596

Rasnichneumon gracilis sp. nov.

( Fig. 3 )

LSID: urn:lsid:zoobank.org:act:33413EDE-5E6B-4C94-AEF9-3EA39E155527

Holotype. NIGP174882 , female. Well-preserved wasp with right wings partly lost.

Material. Holotype only.

Etymology. The species is named gracilis (Latin) — gracile.

Diagnosis. Fore wing with r-rs issuing after pterostigmal midlength, as long as distance between r-rs and m-cu; 2m-cu proclined; hind wing with 2-Rs as short stub, 2-M lost.

Remarks. Differs from R. alexandri in having fore wing with r-rs shorter, issuing beyond the pterostigmal midlength, 2m-cu proclined, hind wing with 2-Rs as short stub and 2-M lost.

Description. Distance between ocelli 1.5× as long as ocellus diameter, distance between eye and lateral ocellus 2× as long as ocellus diameter.Antennae filiform, gracile, 0.8× as long as wing length; scape cylindric, gracile, pedicel tiny, slightly longer than wide, 0.2× as long as scape; first flagellomere 2× as long as 2 nd one, posterior flagellomeres gradually shortening from base to apex, and apical flagellomere 1.3× as long as subapical one.

Fore wing with pterostigma 2.5× as long as wide, with r-rs issuing from 0.6 its length; 1-Rs&1-M as long as r-rs; 2-Cu 3.0× as long as 1-Cu; 2-Rs+M&1m-cu arched, with no sharp bend or traces of ramulus; 2-Rs 0.8× as long as 2+3M; r-rs 1.2× as long as distance between r-rs and m-cu; 2m-cu straight, proclined.

Hind wing with 2-Rs as short stub, 2-M lost, 1-M&rm arched, with no sharp bend.

Ovipositor spear-shaped, serrated, 0.4× as long as fore wing length.

Measurements. Fore wing length 1.5 mm, width 0.6 mm; hind wing length 1.2 mm, width 0.2 mm; antenna length 1.3 mm; ovipositor stylet 0.6 mm, sheath 0.3 mm; body length 2.2 mm.

Figures

FIGURE 3. Rasnichneumon gracilis sp. nov., holotype NIGP174882. A, Lateral view. B, Dorsal view. C, Wings in transmitting light. D, Habitus drawing. E, Wings reconstruction. Scale bars = 1 mm.