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Trimorphodon biscutatus Cope, 1886 Sonoran Lyre Snake; Baja California Lyre Snake; Texas Lyre Snake; Western Lyresnake

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Higher taxa:  Life   Vertebrata   Reptilia   Serpentes   Colubridae   Trimorphodon   Global map IDnature guide: Snakes We parsed the following live from the Web into this page. Such content is managed by its original site and not cached on Discover Life. Please send feedback and corrections directly to the source. See original regarding copyrights and terms of use. Image, Lonesome Valley Reptiles Image, California Image, California Herps Image, Herpo.com Image, Harvard University Map, California Reptiles and Amphibians U. S. Geological Survey Western Ecological Research Center Whozoo Reptiles and Amphibians of Arizona CalPhotos CalPhotos CalPhotos CalPhotos

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© JD Willson, 2006 Trimorphodon biscutatus	© JD Willson, 2006 Trimorphodon biscutatus

Names

Scientific source:       Integrated Taxonomic Information System

Following modified from U. S. Geological Survey Western Ecological Research Center

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Photos by Chris Brown Scientific name: Trimorphodon biscutatus vandenburghi Common name: California Lyre Snake Size: 17.7-35.4 in (45-90 cm) Distinguishing characters: A slender species with a laterally flattened body; broad head, slender neck; V-shaped marking on top of head resembling lyre; light brown or grey on dorsal side with brown blotches; blotches roughly hexagonal and bisected with a pale crossbar; cream or white venter with pale brown spots; smooth scales; large, protruding eyes with vertical pupils. Juveniles: Similar to adults in pattern, but highly contrasting in dorsal color; hatchlings can appear nearly black and white. Dimorphism: Female is larger than male with extremely constricted tail; male's tail thickened midway between anal scale and tip, and is longer than that of a female's. Similar species: Hypsiglena torquata: Has dark blotches on neck; dark bar across head; head less distinct from neck; lacks V-shaped markings on top of head. Additional notes: A nervous species that hisses and vibrates rattleless tail when annoyed. Nocturnal and secretive, in our area it is usually associated with rocky hillsides and outcrops. Return to Snakes -- WERC Home -- Who We Are -- Where We Are -- What We Do -- What's New -- Outreach -- Contact Us -- Search -- USGS Privacy Policy , Disclaimer , Accessibility Comments to: webmaster@werc.usgs.gov URL: http://www.werc.usgs.gov/fieldguide/trbi.htm Last update: 05 March 2003

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Following modified from Reptiles and Amphibians of Arizona

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Following modified from CalPhotos

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CalPhotos     Photo Database   Number of matches : 8 Query: SELECT * FROM img WHERE ready=1 and taxon like "Trimorphodon biscutatus lyrophanes%" and (lifeform != "specimen_tag" OR lifeform != "Animal") ORDER BY taxon Click on the thumbnail to see an enlargement Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0305 0102 [detail] © 2005 Jeremiah Easter Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0307 0092 [detail] © 2007 Andreas Kettenburg Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0707 1110 [detail] © 2007 Ross Padilla Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0907 0466 [detail] © 2007 Andreas Kettenburg Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0907 0467 [detail] © 2007 Andreas Kettenburg Trimorphodon biscutatus lyrophanes California Lyre Snake ID: 0000 0000 0108 0043 [detail] © 2008 Jeremiah Easter Trimorphodon biscutatus lyrophanes California Lyre Snake ID: 0000 0000 0108 0044 [detail] © 2008 Jeremiah Easter Trimorphodon biscutatus lyrophanes California Lyre Snake ID: 0000 0000 0108 0045 [detail] © 2008 Jeremiah Easter Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .    Copyright © 1995-2009 UC Regents. All rights reserved. CalPhotos is a project of BSCIT     University of California, Berkeley

Following modified from CalPhotos

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CalPhotos     Photo Database   Number of matches : 2 Query: SELECT * FROM img WHERE ready=1 and taxon like "Trimorphodon biscutatus lambda%" and (lifeform != "specimen_tag" OR lifeform != "Animal") ORDER BY taxon Click on the thumbnail to see an enlargement Trimorphodon biscutatus lambda Sonoran Lyre Snake ID: 8253 3202 3496 0045 [detail] John H. Tashjian © 1999 California Academy of Sciences Trimorphodon biscutatus lambda Sonoran Lyre Snake ID: 0000 0000 1006 0035 [detail] © 2006 Andreas Kettenburg Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .    Copyright © 1995-2009 UC Regents. All rights reserved. CalPhotos is a project of BSCIT     University of California, Berkeley

Following modified from CalPhotos

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CalPhotos     Photo Database   Number of matches : 3 Query: SELECT * FROM img WHERE ready=1 and taxon like "Trimorphodon biscutatus vandenburghi%" and (lifeform != "specimen_tag" OR lifeform != "Animal") ORDER BY taxon Click on the thumbnail to see an enlargement Trimorphodon biscutatus vandenburghi California Lyre Snake ID: 8253 3202 3496 0048 [detail] John H. Tashjian © 1999 California Academy of Sciences Trimorphodon biscutatus vandenburghi California Lyre Snake ID: 8253 3202 3496 0047 [detail] John H. Tashjian © 1999 California Academy of Sciences Trimorphodon biscutatus vandenburghi California Lyre Snake ID: 8253 3202 3496 0046 [detail] John H. Tashjian © 1999 California Academy of Sciences Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .    Copyright © 1995-2009 UC Regents. All rights reserved. CalPhotos is a project of BSCIT     University of California, Berkeley

Following modified from CalPhotos

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CalPhotos     Photo Database   Number of matches : 31 Query: SELECT * FROM img WHERE ready=1 and taxon like "Trimorphodon biscutatus%" and (lifeform != "specimen_tag" OR lifeform != "Animal") ORDER BY taxon Click on the thumbnail to see an enlargement Trimorphodon biscutatus ID: 0000 0000 1202 1413 [detail] © 2001 Hugo Claessen Trimorphodon biscutatus Western Lyre Snake ID: 0000 0000 0503 0004 [detail] © 2009 William Flaxington Trimorphodon biscutatus Lyre Snake ID: 0000 0000 0703 0343 [detail] © 2003 Nina Jimerson Trimorphodon biscutatus ID: 0000 0000 1202 1412 [detail] © 2001 Hugo Claessen Trimorphodon biscutatus Western Lyre Snake ID: 0000 0000 0508 1207 [detail] © 2009 William Flaxington UCMP specimen card ID: 2222 0904 0001 0084 [detail] © University of California Museum of Paleontology UCMP specimen card ID: 2222 0904 0001 0085 [detail] © University of California Museum of Paleontology UCMP specimen card ID: 2222 0904 0001 0086 [detail] © University of California Museum of Paleontology Trimorphodon biscutatus Western Lyre Snake ID: 0000 0000 0506 0811 [detail] © 2009 William Flaxington Trimorphodon biscutatus Western Lyre Snake ID: 0000 0000 0506 0812 [detail] © 2009 William Flaxington Trimorphodon biscutatus Western Lyre Snake ID: 0000 0000 0506 2027 [detail] © 2009 William Flaxington Trimorphodon biscutatus Western Lyre Snake ID: 0000 0000 0506 2028 [detail] © 2009 William Flaxington Trimorphodon biscutatus Lyre Snake ID: 0000 0000 1006 0096 [detail] © 2006 Brad Moon Trimorphodon biscutatus ID: 0000 0000 0507 1693 [detail] © 2007 Twan Leenders Trimorphodon biscutatus Lyre Snake ID: 0000 0000 0508 1231 [detail] © 2008 BonTerra Consulting Trimorphodon biscutatus Western Lyre Snake ID: 0000 0000 0508 1422 [detail] © 2009 William Flaxington Trimorphodon biscutatus Lyre Snake ID: 0000 0000 0608 0713 [detail] © 2008 BonTerra Consulting Trimorphodon biscutatus ID: 0000 0000 0709 2345 [detail] © 2009 Kate Jackson Trimorphodon biscutatus lambda Sonoran Lyre Snake ID: 8253 3202 3496 0045 [detail] John H. Tashjian © 1999 California Academy of Sciences Trimorphodon biscutatus lambda Sonoran Lyre Snake ID: 0000 0000 1006 0035 [detail] © 2006 Andreas Kettenburg Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0305 0102 [detail] © 2005 Jeremiah Easter Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0307 0092 [detail] © 2007 Andreas Kettenburg Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0707 1110 [detail] © 2007 Ross Padilla Trimorphodon biscutatus lyrophanes Baja California Lyre Snake ID: 0000 0000 0907 0466 [detail] © 2007 Andreas Kettenburg Using these photos: A variety of organizations and individuals have contributed photographs to CalPhotos. Please follow the usage guidelines provided with each image. Use and copyright information, as well as other details about the photo such as the date and the location, are available by clicking on the [detail] link under the thumbnail. See also: Using the Photos in CalPhotos .    Copyright © 1995-2009 UC Regents. All rights reserved. CalPhotos is a project of BSCIT     University of California, Berkeley