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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Braconid and Ichneumonid Wasps (Ichneumonoidea) » Ichneumonid Wasps (Ichneumonidae) » Anomaloninae » Gravenhorstiini » Therion

Genus Therion

Classification · Explanation of Names · Numbers · Identification · Range · Print References · Works Cited

Therion ? - Therion circumflexum - female

Classification

Kingdom Animalia (Animals)

Phylum Arthropoda (Arthropods)

Subphylum Hexapoda (Hexapods)

Class Insecta (Insects)

Order Hymenoptera (Ants, Bees, Wasps and Sawflies)

No Taxon ("Parasitica" - Parasitoid Wasps)

Superfamily Ichneumonoidea (Braconid and Ichneumonid Wasps)

Family Ichneumonidae (Ichneumonid Wasps)

Subfamily Anomaloninae

Tribe Gravenhorstiini

Genus Therion

Explanation of Names

Therion Curtis, 1829-30

Numbers

12 spp. in our area(1)(2)(3)(4)

1. T. circumflexum: transcontinental (Transition Zones)

2. T. fuscipenne: transcontinental (Transition Zones) (= T. confusum(4))

3. T. longipes: transcontinental (inc. CA, MD, NM, NY, PA, VT) (= T. californicum, T. varicolor(4))

4. T. magnum(4)

5. T. minutum(4)

6. T. morio: transcontinental (Transition and Upper Austroriparian Zones)

7. T. nigripes: NY, PA, NJ, MI

8. T. nigrovarium

9. T. petiolatum: ME, NY, MI, WI, SD

10. T. sassacus: NB and ON, s. to VA

11. T. tenuipes: CT, MA, NY, NC, SC

12. T. texanum: Atlantic to 100° W (Upper and Lower Austroriparian Zones)

Identification

"Therion is distinctive because of its apically truncate clypeus without a pointed projection or tooth;

small acute tooth on lower front margin of pronotum;

postpectal carina interrupted in front of each mid coxa;

postnervulus vein joining the discocubital cell nearits midlength;

and because of its modified male hind tarsi which have a weak median longitudinal carina ventrally on segments 2-4." -Charles C. Porter 1999

Key to northeastern USA species by Dreisbach (1947).(2)

Range

New World & Eurasia(5)

Print References

Porter, C. C. (1999). First notice of Therion from South America with description of two new species from Argentina and Bolivia (Hymenoptera: Ichneumonidae). Insecta Mundi, 13(1-2), 85-91.

Works Cited

1.	Carlson R.W. () Ichneumonidae catalog

2.	A New Species of the Genus Therion (Hymenoptera, Ichneumonidæ) with a Key to the Species of the Northeastern States Dreisbach, R.R. 1947. Journal of the New York Entomological Society, 55(3), 201-203.

3.	Hymenoptera of America North of Mexico - Synoptic Catalog C.F.W. Muesebeck and Karl V. Krombein. 1951. United States Department of Agriculture, Agriculture Monograph No. 2.

4.	Nomina Insecta Nearctica Poole, Robert W. Nearctica.com, Inc.

5.	Genera Ichneumonorum Nearcticae (2014)

Contributed by Charley Eiseman on 28 September, 2009 - 1:18am
Additional contributions by Beatriz Moisset, v belov, PaleoJon, behmrachel
Last updated 28 October, 2021 - 12:28am

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