Tectarius (Tectarius) Valenciennes 1833 (periwinkle)
Gastropoda - Sorbeoconcha - Littorinidae
Parent taxon: Tectarius according to Valenciennes 1833
Sister taxa: Tectarius (Subditotectarius), Tectarius coronatus, Tectarius elegans, Tectarius ligniticus
Subtaxa: Tectarius (Tectarius) carinatus
Ecology: epifaunal grazer
Distribution: found only at Egypt 9 (Mokattam) (Eocene of Egypt)