Sometimes taxonomists create new names for groups that already have a name. They may do this because they are unaware of the original name, or they may think the organism before them belongs to a different group when in fact it does not. If two or more names are found to apply to the same group, they are considered synonyms. In most cases, the first name takes priority and is considered to be the valid or accepted name. However, there can be exceptions, and it's not always easy to determine which of a series of synonyms should be considered valid or accepted. Here we list the synonyms provided to EOL by our classification partners. We also include other versions of the name that most likely refer to the same group, for example, misspellings in the literature or different variations of the authorship associated with the name.

Preferred marks the preferred name from each source.

The Reptile Database

Name Relationship
Agkistrodon contortrix LINNAEUS 1766 Preferred
Boa contortrix LINNAEUS 1766: 373 Synonym
Ancistrodon contortrix — BAIRD 1854: 13
Agkistrodon contortrix — BAIRD & GIRARD 1853: 17
Trigonocephalus contortrix — DUMÉRIL & BIBRON 1854: 1494
Cenchris atrofuscus — THEOBALD 1868
Agkistrodon contortrix contortrix — GLOYD & CONANT 1990
Agkistrodon contortrix contortrix — CONANT & COLLINS 1991: 227
Agkistrodon contortrix — LINER 1994
Agkistrodon contortrix — MCDIARMID, CAMPBELL & TOURÉ 1999: 236
Agkistrodon contortrix laticinctus Gloyd and Conant, 1934
Agkistrodon mokasen laticinctus — GLOYD & CONANT 1943
Agkistrodon contortrix laticinctus — GLOYD & CONANT 1990
Agkistrodon contortrix laticinctus — CONANT & COLLINS 1991: 228
Agkistrodon contortrix laticinctus — CROTHER 2000: 56
Agkistrodon contortrix mokasen (PALISOT DE BEAUVOIS 1799)
Agkistrodon mokason PALISOT DE BEAUVOIS 1799
Cenchris mokeson Daudin, 1803
Agkistrodon mokasen mokasen — BURT 1935
Agkistrodon mokasen mokasen — CONANT 1938
Agkistrodon contortrix mokasen — GLOYD & CONANT 1990
Agkistrodon contortrix mokasen — CONANT & COLLINS 1991: 226
Agkistrodon contortrix mokeson — WELCH 1994: 11 (in error)
Agkistrodon contortrix mokasen — CROTHER 2000: 56
Agkistrodon contortrix phaeogaster Gloyd, 1969
Agkistrodon contortrix phaeogaster — GLOYD & CONANT 1990
Agkistrodon contortrix phaeogaster — CONANT & COLLINS 1991: 227
Agkistrodon contortrix phaeogaster — CROTHER 2000: 56
Agkistrodon contortrix pictigaster Gloyd and Conant, 1943
Agkistrodon mokeson pictigaster Gloyd and Conant, 1943
Agkistrodon contortrix pictigaster — GLOYD & CONANT 1990
Agkistrodon contortrix pictigaster — CONANT & COLLINS 1991: 228
Agkistrodon contortrix pictigaster — CROTHER 2000: 56

Species 2000 & ITIS Catalogue of Life: April 2013

Name Relationship
Agkistrodon contortrix LINNAEUS 1766 Preferred
Ancistrodon contortrix BAIRD 1854
Boa contortrix Linnaeus, 1766
Cenchris atrofuscus THEOBALD 1868
Trigonocephalus contortrix DUMÉRIL 1854

Integrated Taxonomic Information System (ITIS)

Name Relationship
Agkistrodon contortrix (Linnaeus, 1766) Preferred
Boa contortrix Linnaeus, 1766 Original name/combination

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