- The
Trocholitidae are
Tarphycerida with
whorls in
close contact as with the Tarphyceratidae, but in
which the siphuncle,
similar in structure, becomes...
-
Discoceras is an
extinct marine cephalopod mollusk, a
member of the
Trocholitidae in the Tarphycerida. It is
distinct from Discosorus, It is characterized...
-
known mainly from the
Lower Ordovician (M-U Canad); gave rise to the
Trocholitidae and
provided the
sources for the more
advanced barrandeocerids Genera...
-
being laterally fanged.
Trochoidal coiling brings to mind the
later Trocholitidae.
Aethoceras was
originally found in the
lower Ordovician of Western...
-
tarphyceratid group consisting of the Estonioceratidae, Tarphyceratidae,
Trocholitidae, and Ophidioceratidae; the
barradeoceratid group,
derived from Centrotarphyceras...
-
Trocholites is a
tarphycerid genus in the
family Trocholitidae from the
Middle and Late
Ordovician with a
gradually expanding,
weakly ribbed s****; whorls...
-
Ordovician (Katian) Kõrgessaare
Formation Estonia A
member of the
family Trocholitidae.
Dowlingoceras tornense Sp. nov
Valid Kröger
Ordovician (Katian) Adila...
-
Curtoceras is a
genus in the
tarphycerid family Trocholitidae of
mollusks found widespread in the late
Early and
Middle Ordovician of
North America and...
-
resembles some lituitids.
Ophioceras seem to have its
origin in the
Trocholitidae,
possibly in Graftonoceras.
Ophioceras has a narrow,
evolutely wound...
-
siphuncles do not
appear until later in the
Early Ordovician with the
Trocholitidae,
which if so
would make it (Eburoceras) exogastric.
Eburoceras is the...
