Thursday, December 21, 2017

A few photos from Entry Run


I drove up to Entry Run in Greene County on Tuesday.  Didn't see anything out of the ordinary, but I got some nice photos worth posting.

Above and below, brushlegged mayfly, Isonychia sp. (probably bicolor).


I still hope to find a nymph with single forecoxal gills -- not sure it's going to happen.  All of the Isonychiidae I've found so far have a "cluster of filaments" at the forecoxae, meaning I can't ID them to the level of species.  On this nymph, those gills show up in this live photo, no need to go to the microscope.

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I wasn't at all surprised to see some of our winter casemakers, a Lepidostomatidae,


and a Thremmatidae (formerly Uenoidae), Neophylax consimilis.

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And, to my surprise, I also found a spiny crawler, Ephemerella subvaria, the nymph of "many colors."



There was one odd thing about this one: the pointed tubercles on terga 5, 6, and 7 were pale colored.


I'm pretty sure that on the nymphs that I've found previously, those tubercles were all black.  Strange.  I plan to look into this.  Probably just a local variation.

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