Trisecphora is one of three daughter genera of the
Oligocene to
Miocene ecphora
Ecphorosycon, the other two being
Siphoecphora, and
Chesathais.
Trisecphora and its sister genera diverged from
Ecphorosycon during a
speciation event during the Aquitanian epoch in the
Chesapeake Bay. During the
Langhian epoch,
Trisecphora underwent its own speciation event where several species, and the first of a divergent lineage,
Ecphora wardi of genus
Ecphora, were produced. Species of
Trisecphora coexisted with
Ecphorosycon,
Chesathais, and
Ecphora (together with its subgenus
Planecphora), until the beginning of the Serravallian, when
Ecphorosycon went extinct (
Trisecphora's sister genus,
Siphoecphora would later go extinct during the Langhian).
Trisecphora, itself, would go extinct during the middle of the Serravallian when a warming event killed the last species of that genus and of
Chesathais off, as well as
extirpating Planecphora (which would survive until the Pliocene in Floridian coral reefs). ==References==