Navicula rhynchocephala
Kützing
Synonym:
Navicula rhynchocephala
var.
constricta
Hustedt
Light micrograph from
Cape Cod, MA
Contributed by P.A. Siver
Scanning electron micrographs from
Avery Pond, CT and Wyassup Lake, CT
Contributed by E.A. Morales