Ellis L. Yochelson; Royal H. Mapes; Doris Heidelberger (2007). "An enigmatic molluscan fossil from the Devonian of Germany: scaphopod or cephalopod?". Paläontologische Zeitschrift. 81 (2): 118–122. Bibcode:2007PalZ...81..118Y. doi:10.1007/BF02988386. S2CID85124687.
Pojeta, John; Runnegar, Bruce (1976). "The paleontology of rostroconch mollusks and the early history of the phylum Mollusca". Professional Paper. doi:10.3133/pp968. {{cite book}}: Missing or empty |title= (help)
Sumner-Rooney, Lauren H.; Schrödl, Michael; Lodde-Bensch, Eva; Lindberg, David R.; Heß, Martin; Brennan, Gerard P.; Sigwart, Julia D. (2015). "A neurophylogenetic approach provides new insight to the evolution of Scaphopoda: A neurophylogenetic approach in Scaphopoda". Evolution & Development. 17 (6): 337–346. doi:10.1111/ede.12164. PMID26487042. S2CID37343813.
Wanninger, Andreas; Haszprunar, Gerhard (2001). "The expression of an engrailed protein during embryonic shell formation of the tusk-shell, Antalis entalis (Mollusca, Scaphopoda)". Evolution & Development. 3 (5): 312–321. doi:10.1046/j.1525-142X.2001.01034.x. ISSN1525-142X. PMID11710763. S2CID8936294.
Ellis L. Yochelson; Royal H. Mapes; Doris Heidelberger (2007). "An enigmatic molluscan fossil from the Devonian of Germany: scaphopod or cephalopod?". Paläontologische Zeitschrift. 81 (2): 118–122. Bibcode:2007PalZ...81..118Y. doi:10.1007/BF02988386. S2CID85124687.
Sumner-Rooney, Lauren H.; Schrödl, Michael; Lodde-Bensch, Eva; Lindberg, David R.; Heß, Martin; Brennan, Gerard P.; Sigwart, Julia D. (2015). "A neurophylogenetic approach provides new insight to the evolution of Scaphopoda: A neurophylogenetic approach in Scaphopoda". Evolution & Development. 17 (6): 337–346. doi:10.1111/ede.12164. PMID26487042. S2CID37343813.
Wanninger, Andreas; Haszprunar, Gerhard (2001). "The expression of an engrailed protein during embryonic shell formation of the tusk-shell, Antalis entalis (Mollusca, Scaphopoda)". Evolution & Development. 3 (5): 312–321. doi:10.1046/j.1525-142X.2001.01034.x. ISSN1525-142X. PMID11710763. S2CID8936294.
Ellis L. Yochelson; Royal H. Mapes; Doris Heidelberger (2007). "An enigmatic molluscan fossil from the Devonian of Germany: scaphopod or cephalopod?". Paläontologische Zeitschrift. 81 (2): 118–122. Bibcode:2007PalZ...81..118Y. doi:10.1007/BF02988386. S2CID85124687.
Sumner-Rooney, Lauren H.; Schrödl, Michael; Lodde-Bensch, Eva; Lindberg, David R.; Heß, Martin; Brennan, Gerard P.; Sigwart, Julia D. (2015). "A neurophylogenetic approach provides new insight to the evolution of Scaphopoda: A neurophylogenetic approach in Scaphopoda". Evolution & Development. 17 (6): 337–346. doi:10.1111/ede.12164. PMID26487042. S2CID37343813.
Wanninger, Andreas; Haszprunar, Gerhard (2001). "The expression of an engrailed protein during embryonic shell formation of the tusk-shell, Antalis entalis (Mollusca, Scaphopoda)". Evolution & Development. 3 (5): 312–321. doi:10.1046/j.1525-142X.2001.01034.x. ISSN1525-142X. PMID11710763. S2CID8936294.
Wanninger, Andreas; Haszprunar, Gerhard (2001). "The expression of an engrailed protein during embryonic shell formation of the tusk-shell, Antalis entalis (Mollusca, Scaphopoda)". Evolution & Development. 3 (5): 312–321. doi:10.1046/j.1525-142X.2001.01034.x. ISSN1525-142X. PMID11710763. S2CID8936294.