Lathrolestes thomsoni 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 thomsoni

description: Lathrolestes thomsoni Reshchikov sp. nov.
Description. Female. Body length 5.0 mm. Antennal flagellum with 24–27 articles. Width to length ratio of scapus 0.47. Head narrowed behind the eyes, mat. Maximal length of temple to transverse eye diameter ratio 0.63; minimal length of temple to transverse eye diameter ratio 0.26. The ratio of the width of the face to the longitudinal diameter of the eye 0.82; convex, without bulge. Clypeus separated from face by impression; at apex projecting slightly anteriorly; apical margin of clypeus moderately thick. Clypeal foveae small. Malar space as wide as 0.36 of basal mandible width (Fig. 56 a). Occipital carina complete, not interrupted above. Lower mandible tooth longer than upper.
Mesosoma. Notaulus slightly impressed. Lower part of mesopleuron without punctures, mat, rugose. Tarsi with apical article very slightly enlarged. Tarsal claws short, strongly curved at apex (Fig. 44). Hind tarsus almost as long as hind tibia; each article length ratio 10:5:4:2:4. Forewing with areolet petiolate. Second recurrent vein with a single bulla. Nervellus intercepted below middle. Nervulus interstitial. Propodeal carinae complete (Fig. 34).
Metasoma. Mat, with sparse white hairs. First metasomal tergum width to length ratio 0.62; without shallow median longitudinal impression; bordered by lateral longitudinal carinae; median longitudinal carinae defined at base; with projections at spiracles (Fig. 38). Second metasomal tergum transverse. Ovipositor straight, thin, very gradually tapered from base to apex, without notch (Fig. 4). Male genitalia with parameres slightly surpassing apex of metasoma.
Color. Female. Body black; Face, malar space and temple reddish-yellow; base of antennae, tegulae, legs (except base and apex of hind tibia and tarsi); base and apex of hind tibia, 5th article of fore tarsi, middle and hind tarsi brownish; metasomal tergum brown with reddish-yellow maculae on sides. Male. Face, clypeus, malar space, lower part of temple, base of antennae, edge of propleuron entirely, fore and hind edges pronotum, prepectus partly or entirely and tegulae yellow. Otherwise as in female (Fig. 56 a, b).
Comments. The species differs from the closely related L. fissus Reshchikov sp. nov. by coloration: mesosoma in female entirely black, propleuron of male yellow; costula present (Fig. 34); face without bulge; lower part of mesopleuron rugose; first metasomal tergum with projections at spiracles. Hind tibia uniformly colored as distinct from European L. albicinctus (Habermehl, 1922). From other species differ by tarsal claws short, strongly curved at apex, with basal lobe (Fig. 44)
Variation. Several individuals with very weak shallow median longitudinal impression of first metasomal tergum.
Etymology. Named in honor of Carl Gustaf Thomson, Sweden researcher, author of many works on Hymenoptera, who described more than thousand species of the family Ichneumonidae including 6 species of the genus Lathrolestes.
Host. Reared from Profenusa thomsoni (Konow, 1886) on Betula papyrifera
Distribution. Canada: AB, NB, NT; USA: AK, MA
Type material examined. Holotype, female, AB, Edson, Canada, 8.vii.-6.viii.2007, ex. from Profenusa thomsoni, A. Soper, (USNM); Paratypes: 4 females, 3 males, AB, Edson, Canada, 8.vii.-6.viii.2007, ex. from Profenusa thomsoni, A. Soper, (USNM); 2 females, 2 males, AB, Edson, Canada, 8.vii.-6.viii.2007, ex. from Profenusa thomsoni, A. Soper, (AEI); 2 females, 2 males, AB, Edson, Canada, 8.vii.-6.viii.2007, ex. from Profenusa thomsoni, A. Soper, (CNC); 2 females, 2 males, AB, Edson, Canada, 8.vii.-6.viii.2007, ex. from Profenusa thomsoni, A. Soper, (ZIN RAS); 2 females, AB, Edmonton, Bearspaw, Canada 19.vii.2007, A. Soper (CNC); 2 males, NT, Hay River, Canada, on Betula sp., 17–20.vii.2007, S. Digweed, (CNC); 4 males, AB, Edmonton, Canada, 11.vii.1994, S. Digweed, (CNC); 2 females, NB, Kouchibouguac National Park, 30.viii.1977, S.J. Miller, (CNC).
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 pages 10-11, DOI: 10.5281/zenodo.197875