词条 | Hypsiglena jani |
释义 |
| image = Hypsiglena torquata jani.jpg | genus = Hypsiglena | species = jani | authority = (Dugès, 1865) | synonyms = *Liophis janii {{small|Dugès, 1865}}[1]
| range_map = Hypsiglena torquata jani distribution.svg | range_map_caption = The distribution of Hypsiglena jani (brown), which now includes the two former subspecies Hypsiglena torquata dunklei (orange), and Hypsiglena torquata texana (yellow). }} Hypsiglena jani, commonly known as the Texas night snake or the Chihuahuan night snake, is a small species of mildly venomous snake in the family Colubridae. The species is native to the southwestern United States and adjacent northeastern Mexico. EtymologyThe epithet, jani, is in honor of Italian taxonomist Giorgio Jan.[6] DescriptionH. jani grows from {{convert|10|to|16|in|cm|abbr=off}} in total length (including tail), record {{convert|20|in|cm}}.[7] It is typically a light gray or tan in color, with dark brown or dark gray blotching down the back, and has an unmarked underside. It has smooth dorsal scales. The eye has a vertically elliptical pupil. H. jani is rear-fanged, and is considered to be venomous, though it is not dangerous to humans. BehaviorAs the common names imply, H. jani is a primarily nocturnal snake. DietThe diet of H. jani consists of primarily lizards, but it will also eat smaller snakes and occasionally soft bodied insects. HabitatH. jani prefers semi-arid habitats with rocky soils. ReproductionH. jani is an oviparous species that breeds in the spring rainy season, laying 4-6 eggs that take approximately 8 weeks to incubate before hatching. The eggs average {{convert|27|mm|in|abbr=on}} long by {{convert|10|mm|in|frac=8|abbr=on}} wide. The hatchlings are about {{convert|15|cm|in|abbr=on}} in total length.[8]Geographic rangeH. jani ranges from southern Kansas to southern Colorado, and south throughout New Mexico, the western half of Texas to central Mexico. SubspeciesThree subspecies are recognized as being valid, including the nominotypical subspecies.[1]
Nota bene: A trinomial authority in parentheses indicates that the subspecies was originally described in a genus other than Hypsiglena. References1. ^1 2 "Hypsiglena jani ". The Reptile Database. www.reptile-database.org. 2. ^Stejneger L, Barbour T (1917). A Check List of North American Amphibians and Reptiles. Cambridge, Massachusetts: Harvard University Press. 125 pp. (Hypsiglena ochrorhynchus texana, p. 93). 3. ^Taylor EH (1938). "On Mexican Snakes of the Genera Trimorphodon and Hypsiglena ". Univ. Kansas Sci. Bull. 25 (16): 357-383. (Hypsiglena torquata dunklei, new subspecies, pp. 374-375 + Plate XXXVII, figure 1). 4. ^Global Names Index. gni.globalnames.org. 5. ^Mulcahy DG (2007). "Molecular systematics of neotropical cat-eyed snakes: a test of the monophyly of Leptodeirini (Colubridae: Dipsadinae) with implications for character evolution and biogeography". Biol. J. Linnaean Society 92: 483-500. (Hypsiglena jani). 6. ^Beolens, Bo; Watkins, Michael; Grayson, Michael (2011). The Eponym Dictionary of Reptiles. Baltimore, Maryland: Johns Hopkins University Press. xiii + 296 pp. {{ISBN|978-1-4214-0135-5}}. (Hypsiglena jani, p. 133). 7. ^Conant R (1975). A Field Guide to Reptiles and Amphibians of Eastern and Central North America, Second Edition. Boston: Houghton Mifflin. xviii + 429 pp. + Plates 1-48. {{ISBN|0-395-19979-4}} (hardcover), {{ISBN|0-395-19977-8}} (paperback). (Hypsiglena torquata texana, p. 217 + Plate 33 + Map 170). 8. ^1 Wright AH, Wright AA (1957). Handbook of Snakes of the United States and Canada. Ithaca and London: Comstock Publishing Associates, a division of Cornell University Press. 1,105 pp. (in 2 volumes) (Hypsiglena torquata texana, pp. 326-330, Figure 101 + Map 30 on p. 315). Further reading
External links
7 : Colubrids|Reptiles of the United States|Fauna of the Western United States|Fauna of the Plains-Midwest (United States)|Fauna of the Southwestern United States|Taxa named by Alfredo Dugès|Reptiles described in 1866 |
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