Johnlongia fossil map
Where fossils of Johnlongia have been found, shown on the Earth as it looked about 85 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 85 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 | Ancient fish & sharks |
|---|---|
| Lived | 121.4–83.6 million years ago (Aptian to Santonian) |
| Periods | Cretaceous |
| Family | Odontaspididae |
| Named by | Siverson 1996 |
| Fossil records | 25 occurrences at 22 locations (PBDB) |
| Found in | United States, Canada, Australia, Russia, France, United Kingdom |
| Rock formations | Carlile Shale, Carlile, Kaskapau, Dunvegan, txn:63010, Haycock Marl |
About Johnlongia
Johnlongia is an extinct genus of sand shark from the Cretaceous period. It contains two described species, J. parvidens and J. allocotodon, and possibly a third unnamed species from the Niobrara Chalk. It is presumed piscivorous; however, it forms a clade with an early filter-feeding shark genus, Pseudomegachasma.
Text in “About” is quoted from the Wikipedia article Johnlongia (revision 1313974063), licensed under CC BY-SA 4.0; introduction excerpted verbatim, formatting removed. Ages, family, authority and fossil records: Paleobiology Database, accessed 23 October 2026. Ages are those of the rock layers the fossils were found in. Wikidata: Q21348201.
