Rhinotorus nasutus ( Gravenhorst, 1829 )

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 : 23-27

Rhinotorus nasutus ( Gravenhorst, 1829)

Fig. 10

Tryphon nasutus Gravenhorst, 1829: 264–265 .

Mesoleius confusus Thomson, 1883: 932 , lectotype examined.

Diagnosis

This species is distinguished from other species in the genus by the following characters: face entirely black ( Fig. 10A ); clypeus relatively thin ( Fig. 10A ); head narrowed behind eyes ( Fig. 10B ); first metasomal tergite not projecting at spiracles and gradually narrowed towards its base ( Fig. 10D ); metasoma partly reddish ( Fig. 10E ).

Type material examined

Lectotype

SWEDEN: ♀, Skåne, MZLU.

Other material examined

FINLAND: 1 ♀, Sauvo, Karuna, 25 Jun. 1981, leg. R. Jussila, RJ; 1 Ƌ, EnL, Enontekiö, Annjaloanji, 7686:279, 12–14 Jul. 2007, leg. R. Jussila, RJ; 1 Ƌ, Lapi, Utsjoki, 9 Jul. 1959, leg. R. Jussila, RJ; 1 Ƌ, Enontekiö, Saana, leg. H. Lindberg, MZH; 1 ♀, Vihti, Siikajäarvi, 23 Jun. 1970, leg. V.J. Karvonen, MZH; 1 Ƌ, Lapi, Utsjoki, Ailigas, 13 Jul. 1965, leg. E. Vesikari, MZH.

SWEDEN: 2 specimens, Uppland, Jun. 1923, leg. A. Roman, NHRS-HEVA000002064, NHRS; 3 ♀♀, Dalarna, Älvdalen, Grövelsjön, Jul. 1911, leg. A. Roman, NHRS-HEVA000002067-69, NHRS; 1 ♀, Lappland, Jokkmokk, Sarek, Jul. 1913, NHRS-HEVA000002065, NHRS; 1 ♀, 46-1945, SMTP, NHRS; 3 ♀♀, Skåne, Höör, 11 Jun. 1938, leg. D.M.S.P. & J.F. Perkins, BMNH; 2 ♀♀, Skåne, V. Ringsjö, 11 Jun. 1938, leg. J.F. Perkins, BMNH; 1 ♀, Lappland, Sorsele kommun, Ammarnäs, Vindelfjällens nature reserve, Tjulträsklaspen, alpine birch wood, 65°58.007 N 16°03.630 E (= Trap ID 46), 27 Jun.–17 Jul. 2004 (= coll. event ID 1945), leg. SMTP, NHRS.

U.K.: 1 ♀, England, Devon, Teignbridge, Newton Abbot, 21 May 1935, leg. J.F. Perkins, BMNH; 1 ♀, England, Surrey, Oxshott, 28 May 1933, leg. J.F. Perkins, BMNH; 1 ♀, England, Lancashire, Lancaster, Silverdale, ex. Nematus lucidus Pz , em. 5 Apr. 1934, leg. H.W. Miles, BMNH.

Description

Female

Fore wing around 6–7 mm long. Antenna slender, around 1.2 times as long as fore wing, with 32 flagellomeres. Ratio of length of 1 st plus 2 nd flagellomeres to eye height 1.1. Scape 1.3 times as long as broad. Head narrowed behind eyes, matt, shagreened and impunctate ( Fig. 10B ). Lateral ocellus separated from eye margin by 1.6 times their widest diameter. Face transverse 2 times as broad as long, shagreened, weakly tapering inwards in anterior view ( Fig. 10A ). Clypeus 0.4 times as high as wide and distinctly separated from face by deep impression, projecting medially, shining and sparsely punctate, its apical margin obtuse medially and impressed laterally. Clypeal fovea deep. Malar space as long as 0.7 of basal mandible width. Occipital carina complete. Mandible teeth of equal length.

Mesoscutum matt, finely granulate. Notaulus distinct. Mesopleuron matt, shagreened. Metapleuron matt, with dense punctation. Propodeum rugose ( Fig. 10C ). Area superomedia fused with area basalis, their combined area 2.9 times as long as broad. Costula absent. Area apicalis trapezoidal, 0.6 times as long as broad, and equal to 0.4 of propodeum, often with longitudinal carina. Spiracles weakly oval, 1.4 times as long as broad. Hind femur 5.3 times as long as broad. Hind tibia 8.25 times as long as apically broad. First tarsomere of hind leg around 8.6 times as long as broad and around 2.15 times as long as second tarsomere. Claws not pectinate. Fore wing with pterostigma short, around 2.6 times as long as broad and intercepted by Rs at its middle. 2m-cu straight, with a single bulla. Cu-a vertical, postfurcal. Hind wing with 1/Cu & cu-a intercepted by 2/Cu in lower 0.5.

Metasoma unevenly punctate. First metasomal tergite 1.5 times as long as apically broad, not projecting dorsally and gradually narrowed towards its base ( Fig. 10D ). Its dorsal longitudinal carinae reaching middle of tergite, with an impression between carinae in basal part. Area between dorsal carina and spiracle with weak longitudinal impression. Spiracles not projecting laterally. Subapical impression strong and rather broad. First metasomal sternite 0.2 times as long as its tergite. Second metasomal tergite 0.6 times as long as apically broad, its transverse impression starting immediately after middle of tergite. Second and third tergite with weak transverse impressions. Ovipositor sheaths weakly cone- shaped ( Fig. 10E ) and as long as 0.5 of height of last visible tergite. Ovipositor stout at base with shallow subapical notch, the tip of upper valve rather elongate after notch, around 0.4 times as long as ovipositor length.

Colouration: body mostly black ( Fig. 10 ); clypeus yellowish-red; antennal flagellomeres, legs (except coxae and trochanters), third and following tergites of metasoma reddish.

Male

Morphologically similar to female. Parameres not elongate apically, extending slightly beyond aedeagus.

Colouration as in female, but with face, sternites, epipleurum of tergites and parameres yellow.

Host records

Nematus lucidus (Panzer, 1801) *.

Distribution

Czech Republic, Finland, Germany, Norway, Poland, Russia (Kostroma, Moscow, Tambov, Tver, Yaroslavl Regions), Sweden, U.K.

Figures

Fig. 10. Rhinotorus nasutus (Gravenhorst, 1829). A. Face. B. Head dorsally. C. Propodeum. D. First metasomal tergite dorsally. E. Habitus.