Rasnichneumon alexandri, 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 : 595-596

Rasnichneumon alexandri sp. nov.

( Fig. 2 )

LSID: urn:lsid:zoobank.org:act:3CD4E52B-E2DF-4B05-944F-C1D2845A7D57

Holotype. NIGP174881 , female. Well-preserved wasp, partly obscured with air bubbles.

Material. Holotype only.

Etymology. The species is named in honor of Professor Alexander P. Rasnitsyn.

Diagnosis. Fore wing with r-rs issuing before pterostigmal midlength, twice as long as distance between r-rs and m-cu; 2m-cu reclined; hind wing with 2-Rs and 2-M reaching wing margin.

Description. Head broad, with eyes set wide apart. Antennae filiform, robust, 0.6× as long as wing length; scape cylindric, robust, pedicel slightly longer than wide, 0.3× as long as scape; flagellomeres gradually shortening from base to apex, and apical segment as long as subapical one. Mandible robust, gradually curved.

Fore wing with pterostigma 4× as long as wide, with r-rs issuing from 0.3 its length; 1-Rs&1-M 1.1× as long as r-rs; 2-Cu 1.8× as long as 1-Cu; 2-Rs+M 1.1× as long as 1m-cu, meeting at distinct angle; short ramulus present; 2- Rs as long as 2+3M; r-rs 2.2× as long as distance between r-rs and m-cu; 2m-cu straight, reclined.

Hind wing with 5 distal hamuli; 2-Rs and 2-M reaching wing margin; 1-Rs 0.1× as long as r-m; 1-M 1.3× as long as r-m.

Propodeum with strong longitudinal carination. 1- st metasomal tergite with strong longitudinal carinae; posterior tergites with rough longitudinal sculpture. Ovipositor spear-shaped, serrated, 0.3× as long as fore wing length.

Measurements. Fore wing length 2.0 mm, width 0.6 mm; hind wing length 1.2 mm, width 0.3 mm; antenna length 1.1 mm; ovipositor stylet 0.6 mm, sheath 0.4 mm; body length 2.3 mm.

Figures

FIGURE 2. Rasnichneumon alexandri sp. nov., holotype NIGP174881. A, Dorso-lateral view. B, Wings in transmitting light. C, Head. D, Habitus drawing. E, Wings reconstruction. Scale bars = 0.2 mm in C, and 1 mm in A, B and D.