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Home » Guide » Arthropods (Arthropoda) » Springtails and allies (Collembola) » Elongate-bodied Springtails (Entomobryomorpha) » Tomoceridae » Pogonognathellus » Pogonognathellus flavescens
Photo#161615
Springtail ? - Pogonognathellus flavescens
Copyright © 2007 Sam Houston

Springtail ? - Pogonognathellus flavescens
Sand Springs, Osage County, Oklahoma, USA
December 19, 2007
Size: 3mm (1/8")
Please help with ID.
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Contributed by Sam Houston on 19 December, 2007 - 10:45pm
Last updated 21 December, 2007 - 8:28am

Moved
Moved from Tomocerus minor.
… Sam Houston, 21 December, 2007 - 8:28am login or register to post comments

Pogonognathellus flavescens
I agree with Sam the specimen resembles the Tomocerus minor specimen.
But note the differences:
1. the 3rd antennal segment (the longest one) tapers more distinctly in Pogonognathellus then in Tomocerus (where it looks more cylindrically)
2. the proportional length of the 4th and 3rd antennal segment:
in Pogonognathellus the ratio of 3rd to 4th antennal segment is much larger than in Tomocerus. In other words: the 4th antennal segment is proportionally larger in Tomocerus.
Checkout this picture of Tomocerus minor by Cheryl Moorehead:
http://bugguide.net/images/raw/KKUKKK9K4KDKGKZSPQT05QC0LK2KGQ30GQO02Q6K2QWK5KJ0AQVKZK2KRK6KKK2KGQ2K7KOKIKLS9Q.jpg

Pogonognathellus flavescens normally has a silvergrey appearance. In this picture it is darker. Probably caused by the light background. The problem with colours in Tomoceridae is that they are the result of iridisation effects and therefore they may vary depending on environmental light conditions...
… Frans Janssens, 21 December, 2007 - 5:18am login or register to post comments

 
Ok so....
Is it Pogonognathellus flavescens or Tomocerus minor ?
… Sam Houston, 21 December, 2007 - 7:54am login or register to post comments

 
,,,
I would go with what Frans says!
… Sean McCann, 21 December, 2007 - 8:18am login or register to post comments

...
What about something like this:
… Sean McCann, 20 December, 2007 - 10:36am login or register to post comments

 
I agree....
Looks to be it. Thanks.
… Sam Houston, 20 December, 2007 - 11:01am login or register to post comments

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