Janvier, P.Proceedings of the National Academy of Sciences, 107, 45, 2010, pàg. 19137–19138. Bibcode: 2010PNAS..10719137J. DOI: 10.1073/pnas.1014583107. PMC: 2984170. PMID: 21041649 [Consulta: free]. «Although I was among the early supporters of vertebrate paraphyly, I am impressed by the evidence provided by Heimberg et al. and prepared to admit that cyclostomes are, in fact, monophyletic. The consequence is that they may tell us little, if anything, about the dawn of vertebrate evolution, except that the intuitions of 19th century zoologists were correct in assuming that these odd vertebrates (notably, hagfishes) are strongly degenerate and have lost many characters over time»
Kuraku et al. «Monophyly of Lampreys and Hagfishes Supported by Nuclear DNA–Coded Genes». Journal of Molecular Evolution doi:10.1007/PL00006595, diciembre 1999.
Delabre, Christiane; etal «Complete Mitochondrial DNA of the Hagfish, Eptatretus burgeri: The Comparative Analysis of Mitochondrial DNA Sequences Strongly Supports the Cyclostome Monophyly». Molecular Phylogenetics and Evolution, 22, 2, 2002, pàg. 184–192. DOI: 10.1006/mpev.2001.1045. PMID: 11820840.
Alysha M. Heimberg, Richard Cowper-Sal·lari, Marie Sémon, Philip C. J. Donoghue, and Kevin J. Peterson, 2010. «microRNAs reveal the interrelationships of hagfish, lampreys, and gnathostomes and the nature of the ancestral vertebrate». PNAS, 107, 45, 09-11-2010, pàg. 19379–19383. DOI: 10.1073/pnas.1010350107. PMC: 2984222. PMID: 20959416.
Janvier, P.Proceedings of the National Academy of Sciences, 107, 45, 2010, pàg. 19137–19138. Bibcode: 2010PNAS..10719137J. DOI: 10.1073/pnas.1014583107. PMC: 2984170. PMID: 21041649 [Consulta: free]. «Although I was among the early supporters of vertebrate paraphyly, I am impressed by the evidence provided by Heimberg et al. and prepared to admit that cyclostomes are, in fact, monophyletic. The consequence is that they may tell us little, if anything, about the dawn of vertebrate evolution, except that the intuitions of 19th century zoologists were correct in assuming that these odd vertebrates (notably, hagfishes) are strongly degenerate and have lost many characters over time»
Janvier, P.Proceedings of the National Academy of Sciences, 107, 45, 2010, pàg. 19137–19138. Bibcode: 2010PNAS..10719137J. DOI: 10.1073/pnas.1014583107. PMC: 2984170. PMID: 21041649 [Consulta: free]. «Although I was among the early supporters of vertebrate paraphyly, I am impressed by the evidence provided by Heimberg et al. and prepared to admit that cyclostomes are, in fact, monophyletic. The consequence is that they may tell us little, if anything, about the dawn of vertebrate evolution, except that the intuitions of 19th century zoologists were correct in assuming that these odd vertebrates (notably, hagfishes) are strongly degenerate and have lost many characters over time»
Powell, Mickie L.; Kavanaugh, Scott I.; Sower, Stacia A. (en anglès) Integrative and Comparative Biology, 45, 1, 01-01-2005, pàg. 158–165. DOI: 10.1093/icb/45.1.158. ISSN: 1540-7063. PMID: 21676757 [Consulta: free].
Delabre, Christiane; etal «Complete Mitochondrial DNA of the Hagfish, Eptatretus burgeri: The Comparative Analysis of Mitochondrial DNA Sequences Strongly Supports the Cyclostome Monophyly». Molecular Phylogenetics and Evolution, 22, 2, 2002, pàg. 184–192. DOI: 10.1006/mpev.2001.1045. PMID: 11820840.
Alysha M. Heimberg, Richard Cowper-Sal·lari, Marie Sémon, Philip C. J. Donoghue, and Kevin J. Peterson, 2010. «microRNAs reveal the interrelationships of hagfish, lampreys, and gnathostomes and the nature of the ancestral vertebrate». PNAS, 107, 45, 09-11-2010, pàg. 19379–19383. DOI: 10.1073/pnas.1010350107. PMC: 2984222. PMID: 20959416.
