Villanyia

Villanyia is a small extinct vole named from two molars at Villány-5 in Hungary. The entire original material was dental, and later study revealed that the two teeth do not tell the same taxonomic story. This page therefore focuses on observable crowns, enamel and localities rather than inventing a skeleton, coat or burrowing behavior. The cover is an artistic reconstruction, not a measured portrait of the type animal.

The name matters to European small-mammal chronology because identifications from different fissure fills have often been compared across the end of the Pliocene and the beginning of the Pleistocene.

Quick facts

The two teeth and the name

Miklós Kretzoi introduced Villanyia exilis in 1956 on the basis of two lower first molars from Villány-5. The short original account did not figure them in detail. Gerhard Rabeder later selected one as lectotype and described the other as a new species, Cseria ultima.

After cleaning and re-examining both originals, David Mayhew concluded in 2009 that Rabeder's selected lectotype matches Clethrionomys kretzoii, whereas the other tooth better fits the long-used concept of V. exilis. A proposal was made to the International Commission on Zoological Nomenclature to conserve usage. The proposal itself should not be mistaken for a final ruling. Mimomys provides another vole comparison in which detailed molar characters matter.

Enamel structure and a narrower genus

Mayhew studied a further tooth from Osztramos-3, close in age to Villány-5, to characterize Villanyia enamel. He compared it with material from Rębielice Królewskie in Poland that had historically been called Villanyia. Those Polish teeth show different enamel features and were referred to Borsodia. The old name had covered more than one lineage.

At Beremend 14, a 2016 faunal study reported one lower first molar as V. exilis. Its wear surface was measured at 2.30 millimeters long. That number describes one crown, not the length of a whole vole. The specimen lacks cementum and some folds present in other arvicolines. One tooth demonstrates an occurrence in a deposit, not regional abundance.

A narrow time interval, broad uncertainty

Accepted V. exilis occurrences cluster near the latest Pliocene and earliest Pleistocene. The geographic name Villány also gave rise to the Villanyian faunal stage, but not every vole from that interval belongs to Villanyia. Old assignments must be checked against type material and enamel anatomy. The broader geological transition is covered in the Quaternary period profile.

No complete skeleton, body mass, coat pattern or precise food list follows from these molars. A digging habit has been suggested by comparison with other voles, not observed in a Villanyia skeleton. Hypnomys, another extinct rodent, is known from much more complete cave skeletons, which illustrates the difference in available evidence. The fissure landscape shown here is interpretive artwork rather than a record of Villány-5.