Rhinotorus umbrarum ( Holmgren, 1857 )

Reshchikov, Alexey V., 2016, A revision of the genus Rhinotorus Förster, 1869 (Hymenoptera, Ichneumonidae, Ctenopelmatinae), with descriptions of three new species and an illustrated identification key, European Journal of Taxonomy 235 (235), pp. 1-40 : 32-36

Rhinotorus umbrarum ( Holmgren, 1857)

Figs 14 , 15

Trematopygus umbrarum ( Holmgren, 1857) : 180, lectotype examined.

Trematopygus obliteratus ( Holmgren, 1857) : 183, lectotype examined.

Diagnosis

This species is distinguished from other species in the genus by the following characters: hind tibia black basally and apically and yellow centrally ( Fig. 14 ); scutellum entirely black ( Fig. 15 C–D); first and second metasomal tergites with weak transverse impressions ( Fig. 15C ).

Type material examined

Lectotype

SWEDEN: ♀, Dalarna, leg. Boheman, NHRS-AVRE0000016, NHRS (lectotype of T. obliteratus ).

Other material examined

FINLAND: 1 ♀, Oulu, Kainuu, Suomussalmi, leg. Hellen, MZH; 1 ♀, Lappi, Muonio, leg. Palmen, MZH; 2 ƋƋ, Lappi, Enontekiö, Kilpisjärvi, 14 Jul. 1964, leg. V.J. Karvonen, NHRS-AVRE0000015, MZH.

RUSSIA: 1 ♀, Kamchatka, leg. R. Malaise, NHRS-HEVA000001987, NHRS.

SWEDEN: 1 ♀, 1 Ƌ, Dalarna, leg. Boheman, NHRS; 1 ♀, Lappland, leg. Boheman, NHRS.

Description

Female

Fore wing around 8–10 mm long. Antenna stout, around 0.8 times as long as fore wing and with 33–34 flagellomeres. Ratio of length of 1 st plus 2 nd flagellomeres to eye height 1.0. Scape as broad as long. Head not narrowed behind eyes, weakly shining. Lateral ocellus separated from eye margin by 1.6 times their widest diameter. Face transverse, 2 times as wide as high, shagreened and without punctures, ( Fig. 15A ). Clypeus 0.35 times as high as wide, distinctly separated from face by deep impression and projecting medially, its apical margin obtuse medially and impressed laterally. Clypeal fovea shallow. Malar space 0.8 times basal mandible width. Occipital carina complete. Mandible with upper tooth slightly longer than lower tooth.

Mesoscutum weakly shining, finely granulate, with dense and uniformly strong punctation. Notaulus distinct. Mesopleuron finely granulate, weakly striated in upper part, shining and distinctly densely and strongly punctate. Metapleuron weakly shining, with rather dense but vague punctation in upper part. Propodeum strongly rugose ( Fig. 15D ). Area superomedia fused with area basalis, their combined area forming a u-shape ( Fig. 15D ). Costula absent. Area apicalis roundish ( Fig. 15D ). Spiracles roundish. Hind femur 4 times as long as broad. Hind tibia 5.5 times as long as apically broad. First tarsomere of hind leg 8 times as long as broad and 2 times as long as second tarsomere. Claws not pectinate. Fore wing with pterostigma short, around 2.7 times as long as broad and intercepted by Rs slightly before its middle. 2m-cu weakly curved in upper part, with a single bulla. Cu-a inclival, postfurcal. Hind wing with 1/Cu & cu-a intercepted by 2/Cu in lower 0.5.

Metasoma shagreened. First metasomal tergite as long as apically broad, weakly projecting dorsally, its dorsal longitudinal carinae reaching middle of tergite and with a strong impression between carinae in basal part. Area between dorsal carina and spiracle with impression. Spiracles projecting laterally. Subapical impression strong, slightly wider laterally than medially. First metasomal sternite 0.3 times as long as its tergite. Second metasomal tergite 0.7 times as long as apically broad, its transverse impression at middle of tergite. Third tergite with weak transverse impression. Ovipositor sheaths weakly coneshaped and 0.8 times as long as height of last visible tergite. Ovipositor stout at base with a shallow subapical notch.

Colouration: body mostly black ( Figs 14B , 15A , C–D); tegulae, upper edge of propleuron at tegulae, middle of hind tibia and rather thin margin of metasomal tergites yellowish; antennal flagellomeres and pterostigma brownish; clypeus and legs (except hind tibia and tarsus) reddish.

Male

Morphologically similar to female, but with clypeus shorter, 0.36 times as long as broad ( Fig. 15B ), and teeth of mandible of equal length. Parameres elongate apically, extending beyond aedeagus, volsella moderately large and notched apically, aedeagus apically downcurved.

Colouration as in female, but sometimes hind yellow margin of tergites wider. Face, sternites and parameres yellow ( Fig. 14A ).

Host records

Pachynematus fallax Lepeletier, 1823 .

Distribution

Finland, Germany, Hungary, Norway, Poland, Romania, Russia (Kamchatka, Yakutia Republic), Sweden.

Figures

Fig. 14. Rhinotorus umbrarum (Holmgren, 1857). A. Ƌ, habitus. B. ♀, habitus.

Fig. 15. Rhinotorus umbrarum (Holmgren, 1857). A. ♀, face. B. Ƌ, face. C. Metasoma dorsally. D. Propodeum.