-
tightly coiled, but
evolute with all
whorls showing. The body
chamber of
tarphycerids is
typically long and tubular, as much as half the
length of the containing...
-
Ordovician of
North America and
Australia and is one of the
earlier tarphycerids found in the
Lower Ordovician El Paso
Group in New Mexico. Aphetoceras...
-
nautiloid genus from the
Middle Ordovician and type for the
Lituitidae (a
tarphycerid family) that in some more
recent taxonomies has been
classified with...
-
Magdoceras is a
genus of Late/Upper
Silurian tarphycerids, a kind of
nautiloid cephalopod with a
coiled s****.
Magdoceras Fossilworks entry. Jack Sepkoski...
- Trocholites, an
tarphycerid from the
Upper Ordovician of Wisconsin...
- The
Lituitidae are a
family of
evolved tarphycerids characterized by a long
orthoconic section that
follows a
coiled juvenile portion at the apex, along...
- Gr**** κέρας (kéras),
meaning "horn", are a
family of
loosely coiled tarphycerids in
which the
inner side of the whorls,
which forms the dorsum, is rounded...
- as
evolutionarily unlikely.
Lituites and the
Lituitidae are
derived tarphycerids and
belong to a
separate evolutionary branch of nautilioids. The number...
- ancestor).
Barrandeocerina is
retained as a
parking place for
evolved tarphycerids with thin
connecting rings. Flower, R.H. & Kummel, B. 1950. A classification...
-
ultimate portion is
slightly divergent, not an
uncommon characteristic of
tarphycerids.
Harmanoceras was
named by
Teichert and
Glenister in 1952. The type us...
