Crotalus lorenzoensis RADCLIFF & MASLIN, 1975

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Higher Taxa	Viperidae, Crotalinae, Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies
Common Names	E: Red Diamond Rattlesnake (exsul: Cedros Island Rattlesnake; lorenzoensis: San Lorenzo Island Rattlesnake; lucasensis: San Lucan Rattlesnake; ruber: Red Diamond Rattlesnake; monserratensis: Red Rattlesnake) G: Rote Diamant-Klapperschlange S: Cascabel de San Lorenzo
Synonym	Crotalus ruber lorenzoensis RADCLIFF & MASLIN 1975 Crotalus ruber lorenzoensis — LINER 1994 Crotalus lorenzoensis — GRISMER 1999 Crotalus ruber lorenzoensis — BEAMAN & HAYES 2008 Hoserea (Mullinsus) lorenzoensis — HOSER 2009 Crotalus lorenzoensis — HEIMES 2016 Crotalus lorenzoensis — JOHNSON et al. 2017 Crotalus lorenzoensis — GARCÍA-PADILLA et al. 2025
Distribution	Mexico (Baja California: endemic to Isla San Lorenzo, Isla Cedros. Type locality: Isla San Lorenzo
Reproduction	ovoviviparous. Crotalus ruber has been hybridized with C. atrox (SCHMIDT 2004).
Types	Holotype: SDNHM = SDSNH 46009; paratypes SDNHM = SDSNH 6605, 45052, 45053
Diagnosis	Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 3124 characters), are available for collaborators and contributors. Please contact us for details.
Comment	Venomous! Subspecies: GRISMER (1999) suggested to elevate Crotalus ruber lorenzoensis to full species status based on an evolutionary species concept.
Etymology	Named after the type locality.
References	Beaman, K.R. & Hayes, W.K. 2008. Rattlesnakes: Research Trends and Annotated Checklist. In: Hayes et al. (eds), The biology of rattlesnakes. Loma Linda University Press, pp. 5-16 García-Padilla, E., Heredia-López, I., Villalobos-Juárez, I., Lazcano, D., & Fucsko, L. A. 2025. Notes on the Herpetofauna of Mexico 48: From Sacred to Scorned---A Study of the Mexican Rattlesnake’s Changing Status. Bulletin of the Chicago Herpetological Society, 60(3), 25-30 - get paper here GARCÍA-PADILLA, ELI; JORGE H. VALDEZ VILLAVICENCIO, ANNY PERALTA GARCÍA 2018. Las Serpientes de Cascabel más allá del continente. Especies - get paper here Grismer, L. Lee. 1999. An evolutionary classification of reptiles on islands in the Gulf of California, México. Herpetologica 55 (4): 446-469 - get paper here Heimes, P. 2016. Snakes of Mexico. Chimaira, Frankfurt, 572 pp Hoser, R. 2009. A reclassification of the rattlesnakes; species formerly exclusively referred to the genera Crotalus and Sistrurus. Australasian J. Herpetol. 3: 1-21 - get paper here Johnson, J. D., L. D. Wilson, V. Mata-Silva, E. García-Padilla, and D. L. DeSantis. 2017. The endemic herpetofauna of Mexico: organisms of global significance in severe peril. Mesoamerican Herpetology 4 (3): 544–620 - get paper here Liner, E.A. 1994. Scientific and common names for the Amphibians and Reptiles of Mexico in English and Spanish. Herpetological Circular 23: 1-113 Peralta-García A, Valdez-Villavicencio JH, Fucsko LA, Hollingsworth BD, Johnson JD, Mata-Silva V, Rocha A, DeSantis DL, Porras LW, and Wilson LD. 2023. The herpetofauna of the Baja California Peninsula and its adjacent islands, Mexico: composition, distribution, and conservation status. Amphibian & Reptile Conservation 17(1&2): 57–142 Radcliffe, C. W.; Maslin, T. Paul 1975. A new subspecies of the red rattlesnake, Crotalus ruber, from San Lorenzo Sur Island, Baja California Norte, Mexico. Copeia 1975 (3): 490-493 - get paper here Reyes-Velasco J., Cox C. L., Jones J. M., Borja M. & Campbell J. A. 2022. How many species of rattlesnakes are there in the Crotalus durissus species group (Serpentes: Crotalidae)? Revista Latinoamericana de Herpetología 5 (1): 43-55 - get paper here
External links	IUCN Red List Google images

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