-
Troostoceras is a
genus of
actinoceratid nautiloids with a
cyrtoconic s****,
otherwise similar to Actinoceras. The s**** is
slightly endogastric, curved...
- Saffordoceras, and
Troostoceras.
Actinoceras is the
earliest but with a
range that
carries it into the
Lower Silurian.
Troostoceras followed by Saffordoceras...
- Actinoceras.
Related contemporary genera include Paractinoceras and
Troostoceras Curt Teichert, 1964. Actinoceratoidea.
Treatise on
Invertebrate Paleontology...
- Ord - E Sil. Actinoceras, Kochoceras, Paractinoceras, Saffordoceras,
Troostoceras Lambeoceratidae; Lambeoceras, Huroniidae,
Huronia , Huroniella, ? Discoactinoceras...
- †Trochodictyoceras †Trocholites †Trocholitoceras †Troedssonella †Troedssonoceras †
Troostoceras †Tshingizoceras †Tubiferoceras †Tumidoceras †Tumidonautilus †Tunguskoceras...
