As originally proposed by Petuch in 1988,
Trisecphora was regarded as a subgenus of
Ecphora (
sensu stricto), as was the genus
Latecphora. However, further study (by Petuch) of these two subgenera lead to their promotion to genera proper. However,
Planecphora Petuch 2004 was originally proposed as a full genus, but was then demoted to subgenus. Currently,
Ecphora is subdivided into the subgenus
Planecphora, and several
species complexes. Originally, the species of
Planecphora consisted of the "
Ecphora choptankensis Species Complex" before Petuch elevated the complex to genus status.
Subgenus Planecphora •
Ecphora (Planecphora) turneri (Petuch, 1988)
Miocene Maryland and
Virginia •
Ecphora (Planecphora) vokesi (Petuch, 1988) Miocene Maryland and Virginia •
Ecphora (Planecphora) choptankensis (Petuch, 1988) (nominate species) Miocene Maryland and Virginia •
Ecphora (Planecphora) delicata (Petuch, 1988) Miocene Maryland and Virginia •
Ecphora (Planecphora) hertweckorum (Petuch, 1987) Pliocene
Florida •
Ecphora (Planecphora) mansfieldi (Petuch, 1989) Pliocene
Florida Ecphora (sensu stricto) Ecphora gardnerae Species Complex •
E. wardi Petuch, 1988 •
E. calvertensis Petuch, 1988 •
E. chesapeakensis Petuch, 1992 •
E. williamsi Ward and Gilinsky, 1988 •
E. conoyensis Petuch, 2004 •
E. asheri Petuch, 1988 •
E.germonae Ward and Gilinsky, 1988 •
E. gardnerae gardnerae Wilson, 1987(nominate subspecies =
Ecphora gardneri) •
E. gardnerae angusticostata Petuch, 1989 •
E. whiteoakensis Ward and Gilinsky, 1988 •
E. streami (Petuch, 1994)
Pliocene •
E. pachycostata (Petuch, 1989) Pliocene
Ecphora meganae Species Complex •
E. mattinglyi Petuch, 2004 •
E. sandgatensis Petuch, 1989 •
E. meganae Ward and Gilinsky, 1988 •
E. amyae Petuch and Drolshagen, 2010 •
E. roxaneae Petuch, 1991
Ecphora rikeri Species Complex •
E. harasewychi Petuch, 1989 •
E. rikeri Petuch, 1988
Ecphora quadricostata Species Complex •
E. floridana Petuch, 1989 •
E. kochi Ward and Gilinsky, 1988 •
E. quadricostata quadricostata (Say, 1824 (nominate subspecies =
Ecphora quadricostata) •
E. quadricostata rachelae Petuch, 1988 •
E. striatula Petuch, 1986 •
E. umbilicata Petuch, 1986 ==Evolution==