Hagadorn, J.W.; Waggoner, B.M. (2002). "The Early Cambrian problematic fossil Volborthella: New insights from the Basin and Range". In Corsetti, F.A. (ed.). Proterozoic-Cambrian of the Great Basin and Beyond, Pacific Section(PDF). SEPM Book. Vol. 93. Society for Sedimentary Geology (SEPM). pp. 135–150. Archived from the original(PDF) on 1 October 2008. Retrieved 1 June 2010.
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.
Webers, G.F.; Yochelson, E.L. (1989). Crame, J.A. (ed.). "Origins and Evolution of the Antarctic Biota". Geological Society of London, Special Publications. Late Cambrian molluscan faunas and the origin of the Cephalopoda. 47 (1): 29. Bibcode:1989GSLSP..47...29W. doi:10.1144/GSL.SP.1989.047.01.04. S2CID128682549.
Kröger, B.R.; Vinther, J.; Fuchs, D. (2011). "Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules". BioEssays. 33 (8): 602–613. doi:10.1002/bies.201100001. PMID21681989. S2CID2767810.
Yochelson, Ellis L.; Flower, Rousseau H.; Webers, Gerald F. (1973). "The bearing of the new Late Cambrian monoplacophoran genus Knightoconus upon the origin of the Cephalopoda". Lethaia. 6 (3): 275. Bibcode:1973Letha...6..275Y. doi:10.1111/j.1502-3931.1973.tb01199.x.
Landing, E.; Kröger, B. (2012). "Cephalopod ancestry and ecology of the hyolith Allatheca degeeri s.l. in the Cambrian evolutionary radiation". Palaeogeography, Palaeoclimatology, Palaeoecology. 353–355: 21–30. Bibcode:2012PPP...353...21L. doi:10.1016/j.palaeo.2012.06.023.
Young, R. E.; Vecchione, M.; Donovan, D. T. (1998). "The evolution of coleoid cephalopods and their present biodiversity and ecology". South African Journal of Marine Science. 20: 393–420. doi:10.2989/025776198784126287.
Shigeno, S.; Sasaki, T.; Moritaki, T.; Kasugai, T.; Vecchione, M.; Agata, K. (2008). "Evolution of the cephalopod head complex by assembly of multiple molluscan body parts: Evidence from Nautilus embryonic development". Journal of Morphology. 269 (1): 1–17. doi:10.1002/jmor.10564. PMID17654542. S2CID13109195.
Brock, G.A. (2004). "A new species of Tannuella (Helcionellida, Mollusca) from the Early Cambrian of South Australia". Association of Australasian Palaeontologists Memoirs. 30: 133–143. hdl:1959.14/41429. ISSN0810-8889.
Webers, G.F.; Yochelson, E.L. (1989). Crame, J.A. (ed.). "Origins and Evolution of the Antarctic Biota". Geological Society of London, Special Publications. Late Cambrian molluscan faunas and the origin of the Cephalopoda. 47 (1): 29. Bibcode:1989GSLSP..47...29W. doi:10.1144/GSL.SP.1989.047.01.04. S2CID128682549.
Yochelson, Ellis L.; Flower, Rousseau H.; Webers, Gerald F. (1973). "The bearing of the new Late Cambrian monoplacophoran genus Knightoconus upon the origin of the Cephalopoda". Lethaia. 6 (3): 275. Bibcode:1973Letha...6..275Y. doi:10.1111/j.1502-3931.1973.tb01199.x.
Landing, E.; Kröger, B. (2012). "Cephalopod ancestry and ecology of the hyolith Allatheca degeeri s.l. in the Cambrian evolutionary radiation". Palaeogeography, Palaeoclimatology, Palaeoecology. 353–355: 21–30. Bibcode:2012PPP...353...21L. doi:10.1016/j.palaeo.2012.06.023.
Lipps, J.H.; Sylvester, A.G. (1 March 1968). "The enigmatic Cambrian fossil Volborthella and its occurrence in California". Journal of Paleontology. 42 (2): 329–336. ISSN0022-3360. JSTOR1302218.
Stinchcomb, B. L. (1980). "New Information on Late Cambrian Monoplacophora Hypseloconus and Shelbyoceras (Mollusca)". Journal of Paleontology. 54 (1): 45–49. JSTOR1304159.
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.
Kröger, B.R.; Vinther, J.; Fuchs, D. (2011). "Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules". BioEssays. 33 (8): 602–613. doi:10.1002/bies.201100001. PMID21681989. S2CID2767810.
Shigeno, S.; Sasaki, T.; Moritaki, T.; Kasugai, T.; Vecchione, M.; Agata, K. (2008). "Evolution of the cephalopod head complex by assembly of multiple molluscan body parts: Evidence from Nautilus embryonic development". Journal of Morphology. 269 (1): 1–17. doi:10.1002/jmor.10564. PMID17654542. S2CID13109195.
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.
Webers, G.F.; Yochelson, E.L. (1989). Crame, J.A. (ed.). "Origins and Evolution of the Antarctic Biota". Geological Society of London, Special Publications. Late Cambrian molluscan faunas and the origin of the Cephalopoda. 47 (1): 29. Bibcode:1989GSLSP..47...29W. doi:10.1144/GSL.SP.1989.047.01.04. S2CID128682549.
Kröger, B.R.; Vinther, J.; Fuchs, D. (2011). "Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules". BioEssays. 33 (8): 602–613. doi:10.1002/bies.201100001. PMID21681989. S2CID2767810.
Shigeno, S.; Sasaki, T.; Moritaki, T.; Kasugai, T.; Vecchione, M.; Agata, K. (2008). "Evolution of the cephalopod head complex by assembly of multiple molluscan body parts: Evidence from Nautilus embryonic development". Journal of Morphology. 269 (1): 1–17. doi:10.1002/jmor.10564. PMID17654542. S2CID13109195.
Hagadorn, J.W.; Waggoner, B.M. (2002). "The Early Cambrian problematic fossil Volborthella: New insights from the Basin and Range". In Corsetti, F.A. (ed.). Proterozoic-Cambrian of the Great Basin and Beyond, Pacific Section(PDF). SEPM Book. Vol. 93. Society for Sedimentary Geology (SEPM). pp. 135–150. Archived from the original(PDF) on 1 October 2008. Retrieved 1 June 2010.
Brock, G.A. (2004). "A new species of Tannuella (Helcionellida, Mollusca) from the Early Cambrian of South Australia". Association of Australasian Palaeontologists Memoirs. 30: 133–143. hdl:1959.14/41429. ISSN0810-8889.
Lipps, J.H.; Sylvester, A.G. (1 March 1968). "The enigmatic Cambrian fossil Volborthella and its occurrence in California". Journal of Paleontology. 42 (2): 329–336. ISSN0022-3360. JSTOR1302218.