Chlaenius egg parasitoid - Trimorus - BugGuide.Net

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Ants, Bees, Wasps and Sawflies (Hymenoptera) » "Parasitica" - Parasitoid Wasps » Platygastroidea » Scelionidae » Teleasinae » Trimorus

Photo#524285

Copyright © 2011 Charley Eiseman

Chlaenius egg parasitoid - Trimorus

Edmonson County, Kentucky, USA
June 4, 2011
Size: 2 mm

On 5/27/2011 I found a number of mud-covered eggs stuck to the undersides of tupelo leaves in a swampy area, at about eye level. I collected three leaves, each with one egg attached, and these larvae emerged from two of them:

One of them apparently ate the other, along with one of two smooshed mosquitoes I put in the container. This wasp emerged from the third egg.

Images of this individual: tag all

Chlaenius egg parasitoid - Trimorus

Chlaenius egg parasitoid - Trimorus

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Contributed by Charley Eiseman on 4 June, 2011 - 5:17pm
Last updated 5 March, 2012 - 2:31pm

SEL report

I just got a report back from the SEL that this specimen has been examined by Matt Buffington and confirmed as Trimorus sp., with this note: "Group needs revision; adults not identifiable to species." Oh well.

… Charley Eiseman, 1 November, 2013 - 10:14am

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Moved

Moved from Scelioninae.

… Charley Eiseman, 5 March, 2012 - 2:31pm

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Moved

Moved from "Parasitica" (parasitic Apocrita).

… Charley Eiseman, 5 June, 2011 - 7:14pm

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Gizmoid

I see a flagellar gizmoid like that in an image identified as Trimorus, albeit a wingless one. Males of a few ichneumonids have a notch in the flagellum, which leads me to suppose your images might be of a male.

… Bob Carlson, 4 June, 2011 - 7:37pm

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I see what you mean

I moved the images to Scelioninae for the time being, based on Victor Kolyada's ID on the other image, but I definitely see the resemblance to Trimorus, and I also see that the only species in the 1979 catalog with Chlaenius listed as a host is T. caraborum, from C. impunctifrons. I noticed the note at the beginning of the Trimorus section: "Practically nothing is known concerning the biology and host relations of the group, but the single apparently reliable rearing record suggests parasitization in eggs of Carabidae." I'm going to try and get some more shots of this wasp while it's still alive, but will definitely send it to the SEL so someone can examine the specimen.

… Charley Eiseman, 5 June, 2011 - 7:20pm

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Trimorus

Trimorus

… Popovici Ovidiu, 5 March, 2012 - 2:22pm

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