Lathrolestes fissus Reshchikov, sp. nov.
Creators: name: Reshchikov, Alexey V.
name: Soper, Anna
name: Van, Roy G.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Lathrolestes
Lathrolestes fissus

description: Lathrolestes fissus Reshchikov sp. nov.
Description. Female. Body length 5.0 mm. Antennal flagellum with 26–31 articles. Width to length ratio of scapus 0.33. Head narrowed behind the eyes, mat. Maximal length of temple to transverse eye diameter ratio 0.8; minimal length of temple to transverse eye diameter ratio 0.48. Face almost as wide as longitudinal eye diameter, their ratio 1.07; in profile convex, with bulge. Clypeus separated from face by transverse impression; at apex projecting slightly anteriorly; apical margin of clypeus moderately thick. Clypeal foveae small. Malar space as wide as 0.33 of basal mandible width (Fig. 55 a). Occipital carina complete, not interrupted above. Lower mandible tooth longer than upper.
Mesosoma. Notaulus absent. Mesopleuron without punctures, mat, shagreen. Tarsal claws short, strongly curved at apex, with basal lobe (Fig. 43). Hind tarsus article length ratio: 5.0:2.0:1.6:1.0:1.7. Forewing with areolet petiolate. Second recurrent vein with a single bulla. Nervellus intercepted below middle. Nervulus interstitial. Propodeal carinae partly complete (Fig. 33). Costula absent.
Metasoma. Partly shiny, pubescent with white hairs. First metasomal tergum width to length ratio 0.8; without shallow median longitudinal impression; bordered by lateral longitudinal carinae; median longitudinal carinae absent; with shiny area at base separate from punctate part, with median longitudinal groove (Fig. 37). 2nd metasomal tergum transverse. Ovipositor straight, thin, very gradually tapered from base to apex, without notch (Fig. 3). Apical margin of male subgenital plate notched (Fig. 40). Male genitalia with parameres not surpassing apex of metasoma.
Color. Female. Body yellow-reddish; fore coxae and trochanters yellow; antennae and ovipositor sheath dark. Male. Face yellow. Otherwise as in female (Fig. 55 a, b).
Comments. The species differs from the closely related L. thomsoni Reshchikov sp. nov. by its mostly yellowish body (Fig. 55 b); costula absent (Fig. 33); face with bulge; lower part of mesopleuron shagreen; first metasomal tergum without projections at spiracles. Hind tibia uniformly colored as distinct from European L. albicinctus (Habermehl, 1922). Tarsal claws short, strongly curved at apex, with preapical teeth (Fig. 43)
Variation. Body of some specimens darker than type specimens.
Etymology. The species epithet, fissus, refers to structure of first metasomal tergum.
Host. Unknown
Distribution. USA: NC, GA, FL
Type material examined. Holotype, female, GA, Forsyth, 12–16.vi.1970, F.T. Naumann, (AEI); Paratypes (AEI): 1 female, FL, Gainesville, SW 34th St., Malaise Trap, 2.x.1985, Brambila; 1 male, Tall Timbers, 2–12.vi.1971, R.H. Arnett; 1 female, NC, Highlands, vi.1977, H&M Townes; 1 female, GA, Forsyth, 28.v.–9.vi.1970, F.T. Naumann
description: Published as part of Reshchikov, Alexey V., Soper, Anna & Van, Roy G., 2010, Review and key to Nearctic Lathrolestes Förster (Hymenoptera: Ichneumonidae), with special reference to species attacking leaf mining tenthredinid sawflies in Betula Linnaeus (Betulaceae), pp. 1-17 in Zootaxa 2614 on page 10, DOI: 10.5281/zenodo.197875