S. Silva, M. J. Servia, R. Vieira-Lanero, S. Barca, F. Cobo: Life cycle of the sea lamprey Petromyzon marinus: duration of and growth in the marine life stage. In: Aquatic Biology. 18, 2013, S. 59–62. doi:10.3354/ab00488.
S. Silva, M. J. Servia, R. Vieira-Lanero, F. Cobo: Downstream migration and hematophagous feeding of newly metamorphosed sea lampreys (Petromyzon marinus Linnaeus, 1758). In: Hydrobiologia. 700, 2013, S. 277–286. doi:10.1007/s10750-012-1237-3.
Christiane Delarbre, Cyril Gallut, Veronique Barriel, Philippe Janvier, Gabriel Gachelin: Complete mitochondrial DNA of the hagfish, Eptatretus burgeri: The comparative analysis of mitochondrial DNA sequences strongly supports the cyclostome monophyly. In: Molecular phylogenetics and evolution. 22 (2), 2002, S. 184–192. doi:10.1006/mpev.2001.1045
Jon Mallatt, Christopher J. Winchell: Ribosomal RNA genes and deuterostome phylogeny revisited: More cyclostomes, elasmobranchs, reptiles, and a brittle star. In: Molecular Phylogenetics and Evolution. Volume 43, Issue 3, Juni 2007, S. 1005–1022 doi:10.1016/j.ympev.2006.11.023
Alysha M. Heimberg, Richard Cowper-Sal·lari, Marie Sémon, Philip C. J. Donoghue, Kevin J. Peterson: microRNAs reveal the interrelationships of hagfish, lampreys, and gnathostomes and the nature of the ancestral vertebrate. In: PNAS. vol. 107, no. 45, 9. November 2010, S. 19379–19383. doi:10.1073/pnas.1010350107
Philippe Janvier: microRNAs revive old views about jawless vertebrate divergence and evolution. In: PNAS. Band 107, Nr. 45, 9. November 2010. doi:10.1073/pnas.1014583107
oxfordjournals.org
mbe.oxfordjournals.org
Jon Mallatt, J. Sullivan: 28S and 18S rDNA sequences support the monophyly of lampreys and hagfishes. In: Mol Biol Evol. 15(12), Dez 1998, S. 1706–1718. (PDF)