Umiaites fossil map
Where fossils of Umiaites have been found, shown on the Earth as it looked about 145 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 145 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 | 149.2–143.1 million years ago (Tithonian) |
| Periods | Jurassic |
| Family | Olcostephanidae |
| Named by | Spath 1931 |
| Fossil records | 1 occurrences at 1 locations (PBDB) |
| Found in | India |
| Rock formations | Bhuj |
About Umiaites
Umiaites is a Late Jurassic (Tithonian stage) ammonitid included in the Olcostephanidae which is part of the Perisphinctoidea. The type is Umiaites rajnathi Spath, 1931.
The shell of Umiaites is large, reaching a diameter of 16 cm or greater, and evolute with a wide shallow umbilicus. Flanks are flat to gently curving. Whorls overlap the previous by a fourth.
So far, Umiaites is known only from Kutch in western India and is considered endemic to the region. Related genera include Spiticeras and Proniceras, with different distribution.
Text in “About” is quoted from the Wikipedia article Umiaites (revision 1366017676), 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: Q7881560.
