Crusopimpla minuta, Klopfstein, 2022

Klopfstein, Seraina, 2022, High diversity of pimpline parasitoid wasps (Hymenoptera, Ichneumonidae, Pimplinae) from the lowermost Eocene Fur Formation (Denmark), Geodiversitas 44 (23), pp. 645-664 : 652-653

Crusopimpla minuta n. sp.

( Fig. 4 )

urn:lsid:zoobank.org:act:B00D3333-29A0-4116-A6A6-073E6B10D466

TYPE MATERIAL. — Holotype female: FUR-13076 (part and counterpart, leg. E. Rettig).

ETYMOLOGY. — The name of this species refers to its small size.

TYPE HORIZON AND LOCALITY. — Denmark, Jutland, Limfjord region, MorsØ Kommune , Svalklit . Cement stone.

MATERIAL EXAMINED. — Tentatively placed in this species: FUR- 14944 (leg. M. Breiner), FUR-16636 (leg. O. Burholt).

DIAGNOSIS. — Taxonomic placement:this species is very similar to the other species of Crusopimpla described herein.In terms of typical pimpline characters, the only somewhat equivocal one is the shape of vein 2m-cu, which is less outward-bowed in this species than in any other pimpline described her from the Fur Formation. However, this might just be a consequence of its small size. Placement in Crusopimpla then is not only supported by the very similar colour pattern to C. rettigi and C. violina , but also by the clearly visible propodeal carination. Crusopimpla minuta can be distinguished from any other species of the genus by its small size.

DESCRIPTION

Preservation

Holotype in lateral view. Head and base of antennae preserved. Mesosoma rather well preserved, including details of metanotal area and part of propodeal carination; fore wings nearly complete, one partial hind wings partly discernible. Metasoma complete with ovipositor sheaths, the latter maybe broken off and only partial (unclear).

Body 5.3 mm. Head and mesosoma black or dark brown, wing venation orange-brown.Antennae entirely orange (holotype), as are the legs. T1 dark only at the very base, rest orange, remaining tergites entirely orange; ovipositor sheaths dark brown.

Head. Transverse, wider than long; only base of antenna preserved, with scape rather short and wide.

Mesosoma. Rather stout; notauli unclear, maybe indicated at front of mesoscutum; propodeum distinctly shortened, with nearly circular spiracle, pleural, lateral longitudinal and at least partial median longitudinal carinae present, both transverse carinae evident at least medially. Fore wing 3.8 mm; areolet closed, quadrate, with uneven sides, 4-M very short, 2r-m about as long as 3r-m; 2m-cu not well preserved, only very little bent outwards; pterostigma 2.7 × longer than wide; 1cu-a meeting M + Cu clearly distad from 1-M; 3-Cu clearly longer than 2cu-a; radial cell 2.4 × longer than wide.Hind wing with 1-Rs about 1.5 × longer than 1rs-m, 1-Cu maybe 1.5 × as long as cu-a. Hind legs not well preserved, but rather stout.

Metasoma. With T1 showing an expansion just after its base in lateral view and an indication of what is probably the spiracle at about 0.25 its length; median longitudinal carina not well visible but maybe indicated;T2 probably shorter than wide (but lateral view), following tergites clearly transverse. Ovipositor sheaths at least 0.34 × as long as fore wing (tip not preserved),rather robust.

Figures

FIG. 4. — Holotype of Crusopimpla minuta n. sp. (FUR-13076), photograph (A), detail (B) and interpretative drawing (C), where dotted lines represent uncertain and/or interpolated interpretations. Scale bars: A, C, 1 mm; B, 0.5 mm.