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Throscidae: Trizagus sp. - Trixagus

Throscidae: Trizagus sp. - Trixagus
Medford, (~15 miles east of Philadelphia, PA) Burlington County, New Jersey, USA
July 11, 2006
Size: ~2.4mm

Images of this individual: tag all
Throscidae: Trizagus sp. - Trixagus Throscidae: Trizagus sp. - Trixagus Throscidae: Trizagus sp. - Trixagus


Trixagus, most-likely
I agree this is most-likely Trixagus, although the divided eye is not why. While all Trixagus have divided eyes, three North American species of Aulonothroscus do too.
From my (very recent) studies, the mesosternal tarsal grooves here are not long and deep enough to be Aulonothroscus. However, the image is not quite sharp enough to see.

Aulonothroscus sp.

divided eye?
from the key in Downie and Arnett, Aulonothroscus is excluded in favor of Trixagus due to the divided eye. Has the taxon changed in this area?

dunno, man; keys to Aulonothroscus in AmBeetles
i don't follow trends; in my Myocene times, everything was called Throscus (=Trixagus), with Aulonothroscus as subgenus

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