Evidence is presented indicating that Lichanura roseofusca and Lichanura trivirgata are conspecific. Data include the report of an intermediate specimen from El Arco, Baja California Norte, a site midway between the previously known peninsular ranges of the two species; captive hybridization provides additional support for the conclusion.
Ottley, John R.; Murphy, Robert W.; and Smith, Geoffrey V.
"The taxonomic status of the rosy boa Lichanura roseofusca (Serpentes: Boidae),"
Great Basin Naturalist: Vol. 40
, Article 4.
Available at: http://scholarsarchive.byu.edu/gbn/vol40/iss1/4