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| - The Crotalinae, commonly known as pit vipers, crotaline snakes, or pit adders, are a subfamily of venomous vipers found in Eurasia and the Americas. They are distinguished by the presence of a heat-sensing pit organ located between the eye and the nostril on either side of the head. Currently, 18 genera and 151 species are recognized: 7 genera and 54 species in the Old World, against a greater diversity of 11 genera and 97 species in the New World.
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| synonym
| - * Agkistrodontini - Hoge & Romano-Hoge, 1983
- * Agkistrodontinii - Hoge & Romano-Hoge, 1981
- * Bothrophera - Garman, 1884
- * Bothrophes - Fitzinger, 1843
- * Cophiadae - Boie, 1827
- * Cophiinae - Cope, 1895
- * Crotales - Cuvier, 1817
- * Crotalida - Strauch, 1873
- * Crotalidae - Gay, 1825
- * Crotalina - Bonaparte, 1831
- * Crotalinae - Cope, 1860
- * Crotalini - Oppel, 1811
- * Crotaloidae - Fitzinger, 1826
- * Crotaloidei - Eichwald, 1831
- * Lachesinae - Cope, 1900
- * Lachesinii - Smith, Smith & Sawin, 1977
- * Teleuraspides - Cope, 1871
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