| Umiaites Temporal range: U Jurassic (Tith) |
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|---|---|
| Conservation status | |
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Fossil
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Ammonoidea |
| Order: | Ammonitida |
| Superfamily: | Perisphinctaceae |
| Family: | Olcostephanidae |
| Subfamily: | Spiticeratinae |
| Genus: | Umiaites Spath, 1931 |
Umiaites is a Late Jurassic (Tithonian stage) ammonitid included in the Olcostephanidae which is part of the Perisphinctaceae. 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.