Beetle ID - Gonocephalum? adpressiforme?

These beetles were swarming on an outside wall at Wettingel School.

It is a beetle in Tenebrionidae family, the darkling beetles, most probably Gonocephalum adpressiforme.

These beetles are very common on Guam. They are scavangers found in leaf litter and they don't cause any damage.

Click here to see an image of Gonocephalum adpressiforme on Gerald McCormack's Cook Island's Biodiversity site.

This incident resulted in a couple of news stories:

KUAM: Bug Infestation at Wettengel Elementary

Guam News Watch: Wettengel Elementary Beetles Taken To UOG For Observation

A PlantWise article on Gonocephalum is available at:

Add new comment

To prevent automated spam submissions leave this field empty.
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Enter the characters shown in the image.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith