Joachimoceras
Encyclopedia
Jaochimoceras is an orthoceroid cephalopod from the Silurian of Central Europe (Bohemia
) named by Baskov, 1960, and included in the Geisonoceratidae
. As with the orthocerids
, its shell is longiconic, siphuncle more or less central, and chambers somewhat long.
Note that Flower, 1976, regarded the Orthoceratidae
and Geisonoceratidae
as forming a continuous series, indivisible into separate families.
Bohemia
Bohemia is a historical region in central Europe, occupying the western two-thirds of the traditional Czech Lands. It is located in the contemporary Czech Republic with its capital in Prague...
) named by Baskov, 1960, and included in the Geisonoceratidae
Geisonoceratidae
Geisonoceratidae is an extinct family of orthoceroid cephalopods endemic to what would be Asia, Europe, and North America from the Middle Ordovician to the Middle Devonian living from about 470—380 mya, existing for approximately 90 million years...
. As with the orthocerids
Orthocerida
Orthocerida is an order of extinct nautiloid cephalopods also known as the Michelinocerda that lived from the Early Ordovician possibly to the Late Triassic . A fossil found in the Caucasus suggests they may even have survived until the Early Cretaceous...
, its shell is longiconic, siphuncle more or less central, and chambers somewhat long.
Note that Flower, 1976, regarded the Orthoceratidae
Orthoceratidae
Orthoceratidae, is an extinct family of actively mobile carnivorous cephalapods, subclass Nautiloidea, that lived in what would be North America, Europe, Asia, Africa, and Australia from the Ordovician through Triassic from 490—203.7 mya, existing for approximately .-Taxonomy:Orthoceratidae was...
and Geisonoceratidae
Geisonoceratidae
Geisonoceratidae is an extinct family of orthoceroid cephalopods endemic to what would be Asia, Europe, and North America from the Middle Ordovician to the Middle Devonian living from about 470—380 mya, existing for approximately 90 million years...
as forming a continuous series, indivisible into separate families.
References
- Flower, R. H. 1976. Ordovician Cephalopod Faunas and Their Role in Correlation, in Bassett, M.C. (Ed); The Ordovician System: Proceedings of a Paleontological Association Symposium; Birmingham, Eng. 1974. Univ of Wales and Welsh Nat’l Mus Press.
- Sweet, W. C. 1964 Nautiloidea- Orthocerida. Treatise on Invertebrate Paleontology, Part K. Geol Soc of America and Univ of Kansas Press. Teichert & Moore, (eds)
- Paleobiology DB -Joachimoceras