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Home » Guide » Arthropods (Arthropoda) » [obsolete rank] - elevate included Orders to Class (Entognatha) » Springtails and allies (Collembola) » Globular Springtails (Symphypleona) » Sminthuridae » Allacma » subgenus Trochopilosa (Allacma subgenus Trochopilosa) » Allacma purpurescens
Photo#146513
globular springtail - Allacma purpurescens
Copyright © 2007 tom murray

globular springtail - Allacma purpurescens
Antrim, Hillsborough County, New Hampshire, USA
September 18, 2007
Size: 1.4mm
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Contributed by tom murray on 18 September, 2007 - 9:17pm
Last updated 20 September, 2007 - 11:14pm

WOW
Things do get complicated. These bugs look so much alike, it's easy to get confused.
… tom murray, 20 September, 2007 - 11:14pm login or register to post comments

Allacma (Trochopilosa) purpurescens
Hi Tom, in this picture the length of the 4th antennal segment is well visible. And it is too long for Allacma s.s. ...
Allacma fusca would be my first guess, but...
Compare with your picture of what I originally (mis)IDed as Sminthurus bivittatus. That specimen is a true Allacma sensu stricto. With relatively shorter 4th antennal segment.

This specimen seems to match best with a dark purplish Allacma-like species that has been placed in a separate subgenus of Allacma: Trochopilosa.

Things can get complicated...
… Frans Janssens, 19 September, 2007 - 5:39am login or register to post comments

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