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Photo#271869
Epheremellid - Drunella grandis

Epheremellid - Drunella grandis
Bow River, Calgary, Alberta, Canada
May 2, 2009
Size: ~15 mm
I'm guessing D. grandis for this one.

Images of this individual: tag all
Epheremellid - Drunella grandis Epheremellid - Drunella grandis

Moved
Moved from Drunella.

probably D. grandis
This is certainly in the grandis/spinifera group, and 15mm is larger than is typical for spinifera. As I understand the general guidelines for distinguishing between spinifera and the grandis subspecies, the "horns" (tubercles) on the top of the head are somewhat pointed in spinifera (more rounded in grandis) and the last two sets of dorsal abdominal spines are 2X-4X the length of the previous ones (2X or less in grandis).

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