Taxonomic Hierarchy
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| Kingdom | Animalia
– Animal, animaux, animals |
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| Subkingdom | Bilateria
– triploblasts |
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| Infrakingdom | Deuterostomia
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| Phylum | Chordata
– cordés, cordado, chordates |
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| Subphylum | Vertebrata
– vertebrado, vertébrés, vertebrates |
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| Infraphylum | Gnathostomata
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| Superclass | Tetrapoda
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| Class | Reptilia Laurenti, 1768
– répteis, reptiles, Reptiles |
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| Order | Squamata Oppel, 1811
– Amphisbaenians, Lizards, Snakes, amphisbènes, lézards, serpents |
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| Suborder | Serpentes Linnaeus, 1758
– Snakes, cobra, serpente, serpents |
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| Infraorder | Alethinophidia Nopcsa, 1923
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| Family | Colubridae Oppel, 1811
– Colubrids, Typical Snakes |
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| Subfamily | Dipsadinae Bonaparte, 1838
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| Genus | Hypsiglena Cope, 1860 – Night Snakes, Nightsnakes |
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Direct Children: |
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| Species |
Hypsiglena affinis Boulenger, 1894
– Rio Grande de Santiago Nightsnake | |
| Species |
Hypsiglena catalinae Tanner, 1966
– Isla Santa Catalina Nightsnake | |
| Species |
Hypsiglena chlorophaea Cope, 1860
– Sonoran Nightsnake, Desert Nightsnake | |
| Species |
Hypsiglena jani (Dugès, 1865)
– San Luis Potosi Nightsnake, Chihuahuan Nightsnake | |
| Species |
Hypsiglena ochrorhynchus Cope, 1860
– Coast Nightsnake | |
| Species |
Hypsiglena slevini Tanner, 1943
– Baja California Nightsnake, Culebra-nocturna de Baja California, Baja California Night Snake | |
| Species |
Hypsiglena tanzeri Dixon and Lieb, 1972
– Rio Verde Nightsnake, Tanzer's Night Snake | |
| Species |
Hypsiglena torquata (Günther, 1860)
– Night Snake, Nightsnake, Culebra-nocturna ojo de gato, Sinaloan Nightsnake | |
| Species |
Hypsiglena unaocularus Tanner, 1946
– Islas Revillagigedo Nightsnake | |
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