calpionellites calpionellites calpionellites is an extinct genus of single celled eukaryotes. their fossils are found in rocks dating to the valanginian stage of the early cretaceous. calpionellitestemporal range: valanginian~ scientific classification domain: eukaryota (unranked): sar (unranked): alveolata family: calpionellidae genus: calpionellites species c. darderi biostratigraphic significance the first occurrence of the species calpionellites darderi marks the beginning of the valanginian and thus end of the berriasian. distribution fossils of the genus have been found in: puke, albania steinmühl formation, austria guasasa formation, cuba lake rożnów, poland lapos formation, romania miravetes and tollo formations, spain