Dactylioceras fossil map
Where fossils of Dactylioceras have been found, shown on the Earth as it looked about 190 million years ago and on today’s map.
Dots are fossil collections recorded in the Paleobiology Database. The “then” view moves today’s fossil sites back to their positions 190 million years ago (the time slice nearest the median age of the fossils) using the Merdith et al. (2021) plate model; positions are approximate. Open on the timeline map →
| Group | Ammonites & nautiloids |
|---|---|
| Lived | 201.4–168.2 million years ago (Hettangian to Bajocian) |
| Periods | Jurassic |
| Family | Dactylioceratidae |
| Named by | (Hyatt 1867) |
| Fossil records | 496 occurrences at 137 locations (PBDB) |
| Found in | Spain, Canada, UK, France, Japan, United States, Morocco, Italy, Germany, Chile … |
| Rock formations | txn:68662, Nishinakayama, Alum Shale, Camino, Sunrise, Spatsizi |
About Dactylioceras
Dactylioceras was a widespread genus of ammonites from the Lower Jurassic period, approximately 180 million years ago (mya).Like many other ammonites, the genus Dactylioceras is extremely important in biostratigraphy, being a key index fossil for identifying their region of the Jurassic. It had a nearly cosmopolitan distribution during the time it existed.
Text in “About” is quoted from the Wikipedia article Dactylioceras (revision 1375066747), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 22 October 2026. Ages are those of the rock layers the fossils were found in.
