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Photo#1477562
Anthribidae on Sneezeweed - Trigonorhinus limbatus

Anthribidae on Sneezeweed - Trigonorhinus limbatus
Plymouth Rock, Winneshiek County, Iowa, USA
October 1, 2017
January 2019: circumstantially connecting life stages of Trigonorhinus limbatus.
Although the beetle larvae were feeding in these flower heads, the browning herbivory in this photo may or may not be due to them.

October 1, 2017: collected 4 flower heads of Sneezeweed, Helenium autumnale, each of which showed a pattern of browning. Gently pulled apart 1 of the heads and found 2 beetle larvae, thrips, what might have been an egg, the ubiquitous tiny orange fly larvae (which I have never been able to rear) and 1 lep larva in the receptacle. The beetle larvae were shallow with frass showing near the surface.

Previously, same location, same Sneezeweed patches
August 5, 2012: ID’d to Trigonorhinus limbatus

September 23, 2015: ID’d to Trigonorhinus limbatus


BG Info:
Food “T. l. limbatus feeds on pollen of various composites, especially Helenium (sneezeweed), Coreopsis, and some similar daisy-like flowers, and the larvae bore in the flower receptacle and stem. (Barry Valentine, pers. comm.)”

December 29, 2017: cocoon opened to larva

December 29, 2017: another cocoon, separated into its own jar

May 11, 2018: this adult emerged from above cocoon


December 2018: opened a cocoon to a dead adult beetle

Images of this individual: tag all
Anthribidae on Sneezeweed - Trigonorhinus limbatus Anthribidae larva on Sneezeweed  - Trigonorhinus limbatus Anthribidae larva on Sneezeweed  - Trigonorhinus limbatus Anthribidae larvae from Sneezeweed  - Trigonorhinus limbatus Anthribidae larvae from Sneezeweed  - Trigonorhinus limbatus

Moved

Moved
Moved from Anthribinae.

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