perekond

Protichnites Owen, 1852

Valik taksonit käsitlevast teaduskirjandusest
Kushlina, V. B. 2006. Biting traces on echinoderms from the Ordovician of the St. Petersburg Region (Russia). 3rd Workshop on Ichnotaxonomy. Prague and Jevíčko (Czech Republic). September 4 – 9, 2006, pp. 12-14.