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Photo#946899
Stenacron interpunctatum

Stenacron interpunctatum
Graves Mill, Madison County, Virginia, USA
June 26, 2014
Size: 10 mm
note lateral markings on sterna

Images of this individual: tag all
Stenacron interpunctatum Stenacron interpunctatum Stenacron interpunctatum Stenacron interpunctatum

Notes on the lateral marks
In most Stenacron larva the female has ventral lateral marks from the 1st through the 9th and are orange in color as in this one. Males most commonly have these markings from the 6th or 7th to the ninth. The absents of claspers is a key to this being a female. After viewing this photo in high zoom the subanal plate and its shape is visible. And it lines up nicely with many of my slide mounted samples both male and female of this "form". As in most larva and adults maculation is a small part of the equation. It does point to "form" and or species. Without dissection and keying the larva out we can only make reasonable conclusions. From historical records there are only 3 "forms" of larva in this genus that have the 8th lateral projection being shorter than the 9th lateral projection. Two of these are currently valid species being Stenacron candidum & pallidum the other is the form proximum. This maculation pattern does not line up with ether of the two valid species. With this plus the maculation pattern it points clearly to (Stenacron interpunctatum / interpunctatum) the "form" proximum.

BTW Robert nice pictures :-)

Mack.

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