Named By: J. A. Clack, P. E. Ahlberg, H. Blom & S. M. Finney - 2012.
Classification: Chordata, Amphibia.
Species: Y. denticulata (type).
Size: Skull estimated to have been about 10 centimetres long, total body size unknown.
Known locations: Greenland, Ymer Island.
Time period: Famennian of the Devonian.
Fossil representation: Partial skull and lower jaws.
found in 1947 in an expedition by Swedish and Danish
palaeontologists, the partial skull and lower jaws did not get named
as their own genus until 2012. Ymeria has been
speculated to have
been similar to the much more famous Ichthyostega,
noticeably smaller teeth that are also not as curved as those of
Ichthyostega. This might indicate that Ymeria
was more of a hunter of
smaller prey items.
Ymeria is only known by a partial skull and jaws, though since these have been described as being similar to Ichthyostega it might also mean that the body was similar to Ichthyostega as well. Reconstructions of Ichthyostega can usually be measured out as the length of the skull being about one fifth of the total body length, which means that multiplying the length of the skull by five times its length would give you a close, but rough estimate of the total length. IF Ymeria had similar body proportions to Ichthyostega, then multiplying the estimated length of the skull, ten centimetres, by five times would result in a total length estimate of the animal of about fifty centimetres for the holotype individual. Please remember though, that this is a rough estimate, only the discovery of far more complete remains could prove this.
- A new genus of Devonian tetrapod from North-East Greenland, with new information on the lower jaw of Ichthyostega - Palaeontology 55 (1): 73–86 - J. A. Clack, P. E. Ahlberg, H. Blom & S. M. Finney - 2012.