Editor’s notes: If you have not read last month’s post, read it. And if you did read last month’s post, go back and read it again. The essay that follows was written under the assumption that the themes developed on 6Dec19 remain fresh in the minds of our readership.
This essay was subsequently published as: Dillon, R.T., Jr. (2023b) CPP Diary: The Many Faces of Professor Troost. Pp 41 – 49 in The Freshwater Gastropods of North America Volume 6, Yankees at The Gap, and Other Essays. FWGNA Project, Charleston, SC.
|Courtesy of Chris Lukhaup|
I surveyed the precincts of Loudon in the summer of 2007 and happened to sample Steekee Creek at the bridge where it enters the corporate limits (35.7242, -84.3473) on its way to The Tennessee. There I found, in addition to P. simplex and P. gabbiana, a population of pleurocerids bearing thin shells of slender spire and strong striation such as depicted in figure (C) below.
|(A) Gap Ck upstream, (B) Gap Ck downstream, (C) Steekee Ck, (D) Sycamore Ck|
|Lea teres , Burch teres , Lea strigosa , Flat Ck (E), Coahulla Ck (F)|
In our next installment... Huntsville hunt!
- CPP Diary: The spurious Lithasia of Caney Fork [4Sept19]
- CPP Diary: What is Pleurocera ebenum? [3Oct19]
- The Fat simplex of Maryville matches type [14Oct16]
- One Goodrich Missed: The skinny simplex of Maryville is Pleurocera gabbiana [14Nov16]
- The heritability of shell morphology in Physa h^2 = O.819! [15Apr15]