Calymene fossil map
Where fossils of Calymene have been found, shown on the Earth as it looked about 445 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 445 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 | Trilobites & sea scorpions |
|---|---|
| Lived | 486.4–393.47 million years ago |
| Periods | Ordovician, Silurian, Devonian |
| Family | Calymenidae |
| Named by | Brongniart 1822 |
| Fossil records | 520 occurrences at 298 locations (PBDB) |
| Found in | United States, Canada, United Kingdom, Estonia, Ukraine, Sweden, Lithuania, Latvia, China, Argentina … |
| Rock formations | txn:85380, Jupiter, Becscie, Cautley Mudstone, Rochester Shale, Gun River |
About Calymene
Calymene is a genus of trilobites in the order Phacopida, suborder Calymenina, that are found throughout North America, North Africa, and Europe in primarily Silurian outcrops. Calymene is closely related to Flexicalymene, and both genera are frequently found enrolled.
Calymene trilobites are small, typically 2 cm in length. The cephalon is the widest part of the animal and the thorax usually has 13 segments.
The correct genus authorship is Brongniart (1822). A previously published genus description in Desmarest (1816) (often mis-cited as "Calymena" Desmarest, 1817) was suppressed by ICZN Opinion 1433.
Text in “About” is quoted from the Wikipedia article Calymene (revision 1351515829), 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: Q2581412.
