Bolcyrus is an extinct genus of prehistoric marine eel that lived during the Early Eocene. It was a member of the family Congridae, which also contains modern conger eels.[1][2][3]
Eastman C.R., 1905 - Les types de poissons fossiles du Monte Bolca au Museum d'Histoire Naturelle de Paris, fasc. 1, t. 13, mém. 34, p. 31
Blot J., 1978 - Les apodes fossiles du Monte Bolca, fasc. 1, vol. 3, p. 260
Mehta, Rita S.; Ward, Andrea B.; Alfaro, Michael E.; Wainwright, Peter C. (2010). "Elongation of the Body in Eels". Integrative and Comparative Biology. 50 (6): 1091–1105. doi:10.1093/icb/icq075.