-
Selkirkoceras is a
genus of
armonoceratid cephalopods similar to
Kochoceras of the Actinoceratidae, but with re****bent
septal necks. The
first siphuncular...
-
Nybyoceras in the
Second Value Formation in New Mexico; with
Armenoceras and
Selkirkoceras in the
Burnam Limestone in
central Texas; with Actinoceras, Paractinoceras...
- it is ****ociated with the actinocerids, Armenoceras, Ormoceras, and
Selkirkoceras.
Paleontology portal Marine life
portal List of
nautiloids Teichert...
-
derived from Wutinoceras.
Additional genera include Nybyoceras and
Selkirkoceras, respectively, from the
upper Middle and
Upper Ordovician, and Monocyrtoceras...
- two
branches of the
Armenoceratidae that also
includes Nybyoceras and
Selkirkoceras. Curt Teichert, 1964. Actinoceratoidea,
Treatise on
Invertebrate Paleontology...
- †Schuchertoceras †Scofieldoceras †Scyphoceras †Seelyoceras †Selenoceras †
Selkirkoceras †Shamattawaceras †Shantungendoceras †Shideleroceras †Shikhanoceras †Sholakoceras...
-
earlier (1964)
indicated that
Nybyoceras gave rise to the
Ordovician Selkirkoceras and to the
Silurian Megadisocosorus. Flower, R.H, 1957,
Studies of the...
-
although the
reverse was
earlier suggested in
Teichert (1964), and to
Selkirkoceras in the Eden-Red
River Stage in the
Upper Ordovician.
Possible Silurian...
- Armenoceratidae,
Troedsson 1926;
early M Ord - Sil. Armenoceras, Nybyoceras,
Selkirkoceras,
Elrodoceras Gonioceratidae, late Mid Ord, N Am.
Gonioceras (from early...
