The simplex and other forms of the upper third molar (M3) in the common vole (Microtus arvalis) in Zeeland, the Netherlands
The frequencies of the various forms of M3 (simplex, transient and normal) in common (Microtus arvalis) voles were determined in different regions (all former islands) in the province of Zeeland, the Netherlands. A possible higher incidence of left-sidedness of simplex and transient M3 forms was also investigated. The frequency of simplex forms of M3 has not apparently been studied in any other part of the Netherlands, except for the north. Common vole specimens (1254 skulls) from owl pellets that were collected between 1995 and 2010 were studied.