Sarah Duhon

Joined: Sep 29, 2017 Last Active: Dec 05, 2019

I am an Environmental Science student at the University of Iowa and I love mushrooms.

The bulk of my research has been on Stereum, and specifically how different species have been handled historically and what DNA barcoding tells us about where species boundaries really lie in this genus.

Stereum ostrea in the eastern U.S. has a fraught history, first considered a synonym of S. fasciatum, then vice versa, and S. ostrea eventually acquired S. lobatum as a synonym as well as many other less-known species. Through DNA barcoding it is evident that they are, in fact, separate species both morphologically and molecularly, and that a similar species S. subtomentosum is relatively common within their range as well (just adding to past confusion I'm sure).

Are S. lobatum and fasciatum stil considered S. ostrea currently? The simple answer is yes due to taxonomic rules, however as S. ostrea was described from Java, in all likelihood it is a separate species not found in the U.S.

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