Freshwater Gastropods of North America

Editor’s Note – This brief post is offered as an appendix to my essay of 6Feb19 , “Ferrissia fragilis (Tryon 1863).” Several of you ha...

Editor’s Note – This essay was subsequently published as: Dillon, R.T., Jr. (2023c)  Ferrissia fragilis (Tryon, 1863).  Pp 207 – 214 in The...

Editor’s Note – This essay was subsequently published as: Dillon, R.T., Jr. (2019d) Everett's Symbiosis.  Pp 101 - 107 in The Freshwat...

Editor's Note.   This essay was subsequently published as: Dillon, R.T., Jr. (2019b) The egg masses of freshwater pulmonate snails.  Pp ...

Editor’s Note – This essay was subsequently published as: Dillon, R.T., Jr. (2019c) Bryant Walker's sense of fairness.  Pp 191 - 198 in...

Editor's Note.   This essay was subsequently published as: Dillon, R.T., Jr. (2019b)  Rhodacmea ridotto.  Pp 149-155 in Freshwater Gastr...

Editor's Note.   This essay was subsequently published as: Dillon, R.T., Jr. (2019b)  Two species of Ferrissia.  Pp 143-147 in The Fresh...

Editor's Note:  A substantial fraction of the material in this essay was subsequently rendered obsolete by the 2010 research of Walther ...

Editor's Note.   This essay was subsequently published as: Dillon, R.T., Jr. (2019b)  Phylogenetic sporting and the genus Laevapex.  Pp ...