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Photo#1722943
Teretrius sp.? - Teretrius obliquulus

Teretrius sp.? - Teretrius obliquulus
Roseville, Vernon St., 38.7227, -121.2993, Elevation = 50m (164'), Placer County, California, USA
September 3, 2019
Size: 2.6 mm
Taken from a Lingren Funnel Trap.
Posted to verify genus & species.

Looks very much like Teretrius orbus, with the impressed humeral striae, but this range is wrong for that species and no others in BG have that character that I can find.

Characters important from Arnett (1).
Head
-- Frons evenly convex.
-- Labrum plurisetose, seen in above photo sticking out under clypeus.
-- Antennal club not concealed by extension of prosternal lobe.
-- Antennal funicle in repose curving outward seen in above photo.
Thorax
-- Mesepimeron visible from above, seen in dorsal and side views.
-- Pronotal disk without longitudinal or transverse grooves.
-- Mesosternum with 5-6 punctures along midline (vs. 2-3 in orbus).
Body
-- Elytra with impressed humeral striae, seen best in side view.
-- Pygidium evenly convex.
-- Elytra striae obsolete.
-- Form cylindrical and parallel-sided.

Images of this individual: tag all
Teretrius sp.? - Teretrius obliquulus Teretrius sp.? - Teretrius obliquulus Teretrius sp.? - Teretrius obliquulus Teretrius sp.? - Teretrius obliquulus Teretrius sp.? - Teretrius obliquulus Teretrius sp.? - Teretrius obliquulus Teretrius sp.? - Teretrius obliquulus Teretrius sp.? - Teretrius obliquulus

Moved
Moved from Teretrius obliquus.

Teretrius obliquus Horn
The longer mesosternum with 5-6 punctures along midline (vs. 2-3 in orbus) separates this species. Teretrius obliquus also tends to be a bit larger and longer, also being a bit more finely punctate dorsally, but they are both in the same subgenus and are fairly similar otherwise.

 
Thanks for explaining the cha
Thanks for explaining the characters for the species. I couldn't find that in the literature.
I added a picture to illustrate the character Mr. Warner talked about.
"...mesosternum with 5-6 punctures along midline...".

Moved
Moved from Clown Beetles.

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