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springtail - Hydroisotoma schaefferi - male

springtail - Hydroisotoma schaefferi - Male
Groton, Middlesex County, Massachusetts, USA
March 28, 2013
Size: 1.5mm
Is this one a Hydroisotoma schaefferi?
Lots of these springtails were on the water in a vernal pol.

Moved from Springtails and allies.
Thanks Frans! Should the species name end with an i like what's in the guide, or should an a be added?

Thanks for pointing out...

schaefferi is fine...

Hydroisotoma schaefferi
Indeed. Note the 'warts' on the 2nd antennal segment, typical for a male specimen.

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