• Late Cambrian to late Triassic • Possible predecessor of the cyclostomes • Small (2 in) extinct eellike fish with a finned tail and a notochord and ... смотреть
conodont: translationthe problematical small tooth-like fossil of the Cambrian, Silurian and Devonian periods which could well be a tooth of Cyclostoma... смотреть
конодонт