Syrphoctonus tarsatorius

Klopfstein, Seraina, 2014, Revision of the Western Palaearctic Diplazontinae (Hymenoptera, Ichneumonidae), Zootaxa 3801 (1), pp. 1-143 : 98

publication ID

https://dx.doi.org/10.11646/zootaxa.3801.1.1

publication LSID

lsid:zoobank.org:pub:E5F8C489-37F4-4A76-8E25-EFC65CDCA1D7

DOI

https://doi.org/10.5281/zenodo.6135820

persistent identifier

https://treatment.plazi.org/id/C1225000-FFC0-FF84-B5BD-A2D6FBBAF931

treatment provided by

Plazi

scientific name

Syrphoctonus tarsatorius
status

 

Syrphoctonus tarsatorius ( Panzer 1809, Bassus)

Bassus exsultans Gravenhorst 1829

Bassus insignis Gravenhorst 1829

Bassus flavus Desvignes 1862

Bassus indicus Cameron 1909

Homotropus eximius Habermehl 1922 (syn. nov.)

Homotropus flavitrochanterus Uchida 1957

Diagnosis. Fore wing length 3.9–6.4 mm. Antenna in females with 19–21 flagellomeres, in males with 19–23 flagellomeres, with tyloids on flagellomeres 6–7 to 14–16. Epicnemial carina sometimes only weakly interrupted behind fore coxa. Mesoscutum strongly coriaceous and distinctly punctate. Propodeum almost devoid of carinae, at most with pleural carina and apex of lateral longitudinal carina weakly indicated, sculpture coriaceous and matt. Female metasoma gradually tapered to apex, first tergite 1.0– 1.4 times longer than wide in females, 1.2–1.5 in males; spiracle of third tergite slightly to distinctly below lateral fold.

Colouration of females. Antenna dark brown or black. Head and mesosoma black, face with a yellow central face patch, yellow on clypeus, mouthparts, hind corner of pronotum, tegula, sometimes subtegular ridge, large shoulder mark, upper mesepimeron, and most of scutellum. Legs orange, fore coxa dark, mid and hind coxae orange; femora orange; hind tibia dark orange with a dark apex, tarsus dark. Metasoma black, usually with hind margins of tergites 2 or 3 to 5 or 6 yellow.

Colouration of males. As in females but with yellow ventrally on antenna, entire face, entire propleuron, most of pronotum, epicnemium, a varying portion of mesosternum, and a stripe on lower mesopleuron. Fore and mid and often also hind coxae entirely yellow. Metasoma as in females but often with yellow posterior margins broader and yellow spots on basolateral corners of tergite 3.

Material examined. Holotype of Bassus indicus Cameron : India, Simla . 1 ♂, at BMNH . Holotype ♀ of Homotropus eximius Habermehl examined by Erich Diller (personal communication).

Finland (3), France (2), Germany (1), Hungary (30), Sweden (40), Switzerland (> 100), Turkey (1), United Kingdom (30).

Distribution. Holarctic and Oriental.

Figures. Mesoscutum ( Fig. 12 View FIGURE 12. A B), epicnemical carina ( Fig. 16 View FIGURE 16. A B), clypeus ( Fig. 16 View FIGURE 16. A D), metasoma ♀ ( Fig. 24 View FIGURE 24 B), habitus ( Fig. 34 View FIGURE 34 F).

Notes. This is a species with a large range of variation in size and also colouration. Two specimens of a colour variant which might or might not represent a distinct species were found in the Swiss Alps and in Finland. They have a mostly black hind tibia with a whitish base and yellow posterior bands on tergites 2 to 7 instead of the usual 2 to 5 in females. No distinction from specimens with the typical orange hind tibia was found in the CO 1, ND 1 and 28 S markers. It remains to be shown if this variant represents a distinct species.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Ichneumonidae

Genus

Syrphoctonus

Loc

Syrphoctonus tarsatorius

Klopfstein, Seraina 2014
2014
Loc

Homotropus flavitrochanterus

Uchida 1957
1957
Loc

Homotropus eximius

Habermehl 1922
1922
Loc

Bassus indicus

Cameron 1909
1909
Loc

Bassus flavus

Desvignes 1862
1862
Loc

Bassus exsultans

Gravenhorst 1829
1829
Loc

Bassus insignis

Gravenhorst 1829
1829