Bronnen, noten en/of referenties
- ↑ Pojeta, J. Jr. (1975) Fordilla troyensis Barrande and early pelecypod phylogeny. Studies in paleontology and stratigraphy. Bulletins of American Paleontology. 67(287):363–384, pl. 1–5.
- ↑ Hinz-Schallreuter, I. (2000). Middle Cambrian Bivalvia from Bornholm and a review of Cambrian bivalved Mollusca. Revista Española de Micropaleontología. 32(2):225–242.
- ↑ J. Barrande. (1881) Système Silurien de Centre de la Bohême. Volume VI: Acéphales. Système Silurien de Centre de la Bohême. Volume VI: Acéphales 1-342