Brands, S. J. (compiler). (1989-2005). Systema Naturae 2000. Amsterdam, The Netherlands (2006 version). Originally available online at http://sn2000.taxonomy.nl/; for current information, refer http://taxonomicon.taxonomy.nl/ProjectDescription.aspx .

basis of record

Parker, S.P. (ed). (1982). Synopsis and Classification of Living Organisms. McGraw-Hill, New York. 2 volumes.

habitat flag source

Systema Naturae 2000 (2006 version)

extant flag source

The Paleobiology Database (2019 version). Available online at www.paleobiodb.org.

taxonomy source

The Paleobiology Database (2019 version). Available online at www.paleobiodb.org.

additional source