- 1-98. ("
Ophryacus Cope, gen. nov.", p. 88.) O'Shea, M. 2005.
Venomous Snakes of the World.
Princeton University Press. ISBN 0-691-12436-1.
Ophryacus at the...
- 480 pp. ISBN 0-8069-6460-X. "
Ophryacus undulatus".
Integrated Taxonomic Information System.
Retrieved 27 July 2008.
Ophryacus undulatus at the IUCN Red List...
- vegetation.
Terrestrial and less arboreal. "
Ophryacus undulates group". ncbi.
Retrieved 2 May 2018.
Ophryacus sphenophrys at the Reptarium.cz
Reptile Database...
-
Terrestrial and less arboreal. "
Ophryacus smaragdinus". novataxa. 12
January 2016.
Retrieved 2 May 2018.
Ophryacus smaragdinus at the Reptarium.cz Reptile...
-
melanurus at the Reptarium.cz
Reptile Database.
Accessed 13
December 2014. "
Ophryacus melanurus".
Integrated Taxonomic Information System.
Retrieved 27 July...
-
viper Ophryacus,
Mexican horned pit
vipers Ophryacus smaragdinus,
Emerald horned pit
viper Ophryacus sphenophrys, Broad-horned pit
viper Ophryacus undulatus...
-
Mixcoatlus Jadin, H.M.Smith & Campbell, 2011 3
Mexican pit
vipers Mexico Ophryacus Cope, 1887 3
Mexican horned pit
vipers Mexico Ovophis Burger, 1981 7 Mountain...
-
Opheodrys vernalis Ophiophagus Ophiophagus hannah Ophryacus Ophryacus smaragdinus Ophryacus sphenophrys Ophryacus undulatus Opisthotropis Opisthotropis alcalai...
-
Shedao Island pit
viper (Gloydius shedaoensis)
Montivipera albicornuta Ophryacus undulatus Cameron highlands pit
viper (Popeia nebularis)
Caucasus subalpine...
-
Mixcoatlus browni (Shreve, 1938)
Mixcoatlus melanurus (Müller, 1923)
Ophryacus undulatus (Jan, 1859)
Porthidium dunni (Hartweg & Oliver, 1938) Porthidium...
