Hotz, H., T. Uzzell, P. Beerli, and G.-D. Guex. 1996. Are hybrid clonals species? A case for enlightened anarchy. Amphibia-Reptilia 17: 315-320.

Abstract -- Animal taxa of interspecies hybrid origin that have derived obligatory clonal reproductive modes leading to genealogical persistence demand clear, stable names as labels to refer to them. We recommend (1) that clonal hybrid taxa distinguished by the combination of parental genomes they contain be recognized; (2) that they be referred to, consistently for each group studied, either with formal names or informal ones; and (3) that the existing taxonomic species category be used for them rather than creating additional special nomenclatural categories for the several non-Mendelian reproductive modes.