-
common for the Ellesmerocerida,
Ellesmeroceras has
diaphragms within the
siphuncle tube. The type species,
Ellesmeroceras scheii,
named by Foeste, 1921...
-
diversified during that time into a
variety of
forms and genera. Some like
Ellesmeroceras and
Eremoceras were
straight s****ed,
following the
example of Ectenolites...
-
genus of small, slender,
cylindrical Ellesmeroceratids that
resemble Ellesmeroceras but are
smaller and
proportionally narrower. Septa, as
typical for ellesmerocerids...
- were not very
different from
their Cambrian predecessors.
Specimens of
Ellesmeroceras and
possibly B****leroceras,
found in
Santa Rosita Formation, northwestern...
- Ordovician,
characterized by an
orthoconic adult stage,
similar to
Ellesmeroceras, but with the
dorsal side of the
adult living chamber somewhat convex...
-
locality for
genus †Echinochiton
dufoei – type
locality for
species †
Ellesmeroceras †Ellipsocephalus †Elrodoceras †Encrinurus †Entomaspis †Eophacops †Eophacops...
- †Edrioaster †Edrioaster
bigsbyi †Ellesmeria †Ellesmeria
scobeyi †
Ellesmeroceras †
Ellesmeroceras winoni**** †Ellipsocephaloides †Ellipsocephaloides
curtus †Ellipsocephaloides...
- †Ectenolites †Edmondia –
tentative report †Eldredgeops †Eldredgeops rana †
Ellesmeroceras †Elliptocephala †Emmonsia †Encrinurus †Endoceras †Eoagnostus †Eoarthropleura...
-
continued from the Late Cambrian,
along with the
exclusively Ordovician Ellesmeroceras the
similar Eremoceras, both
cylindrically orthoconic, and the compressed...
- †Eifeloceras †Ekwanoceras †Elaphoceras †Eldroceras †Eleusoceras †Elkanoceras †
Ellesmeroceras †Ellinoceras †Elpisoceras †Elrodoceras †Encoiloceras †Endoceras †Endocycloceras...
