Named By: R. Wild - 1978.
Classification: Chordata, Reptilia, Dinosauria, Saurischia, Sauropodomorpha, Sauropoda, Vulcanodontidae?
Species: O. liasicus (type).
Size: Estimated about 4 meters long.
Known locations: Germany - Posidonia Shale.
Time period: Toarcian of the Jurassic.
Fossil representation: Partial limb ones including tibia, astralgus and calcaneus.
is a little known genus of sauropod,
and perhaps not surprisingly
known by very little remains. These remains have in the past been
attributed to the Vulcanosontidae group of sauropods, though this
group has also been problematic in its classification in the past, in
fact for a time the group fell into disuse after the type genus
could only be confidently assigned to it. It was only with
the 2004 description of the genus Tazoudasaurus
that the group has
seen a limited resurrection in use. Still, the Ohmdenosaurus
remains have been considered to be so indeterminate that they have an
uncertain place within this group, and some researchers have even
questioned the validity of the genus given that it would be exceedingly
difficult to attribute further remains to the genus.
The Ohmdenosaurus fossils were found in a marine deposit, but weathering patterns on the bones seem to suggest that they were washed out to sea as bones, rather than an individual being washed out to sea and then decomposing. The time period that the remains were deposited in has been pinned down as the Toarcian of the Jurassic, something that has been possible due to the presence of other Toarcian aged animals such as the snail Coelodiscus.
- Ein Sauropoden-Rest (Reptilia, Saurischia) aus dem Posidonienschiefer (Lias, Toarcium) von Holzmaden - 1978.