Mollusca
Class

Helcionelloida Peel, 1991

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Aiheeseen liittyvät julkaisut
Høyberget, M., Ebbestad, J. O. R., Funke, B., Nakrem, H. A. 2015. The shelly fauna and biostratigraphy of the lower Cambrian (provisional series 2, stage 4) Evjevik Member, Ringstrand Formation in the Mjøsa area, Norway.Norwegian Journal of Geology , DOI:10.17850/njg95-1-02
Isakar, M., Peel, J. S. 2007. Lower Cambriam helcionelloid molluscs from Estonia.GFF 129 , 3,255-262. DOI:10.1080/11035890701293255
Öpik, A. 1926. Über den estländischen Blauen Ton.Tartu Ülikooli juures oleva Loodusuurijate Seltsi Aruanded 33 , 1,39-47.