Benson, W. H. (1855). Characters of the genus Opisthoporus, an eastern form of the Cyclostomacea, with remarks on its affinities and notes on several opercula. Annals and Magazine of Natural History, Series 2. 15(85): 13-16.
393961
Benson, W. H.
1855
Characters of the genus <i>Opisthoporus</i>, an eastern form of the Cyclostomacea, with remarks on its affinities and notes on several opercula.