found: Global biodiversity information facility website, Apr. 25, 2011:(Order Tentaculitida, Class Cricoconarida, Phylum Mollusca)
found: Lehmann, U. Wirbellose Tiere der Vorzeit. English. Fossil invertebrates, 1983, via Google books, viewed Apr. 25, 2011:table of contents (Phylum Mollusca - Subphylum Conchifera - Class Coniconchia (syn. Cricoconarida) - Order Tentaculida) p. 180 (tentaculitids)
found: ABC Biologie. English. Concise encyclopedia biology, 1996, via Google books, viewed Apr. 25, 2011:(Tentaculitida, tentaculites: an extinct group of mollusks in the class Cricoconarida. Fossils are found from the Lower Ordovician to the Upper Devonian)