Crotalus lannomi

Etymology

The specific name, lannomi, is in honor of Joseph R. Lannom, Jr., who collected the type specimen.

Description

C. lannomi was described from a single specimen, a female 63.8 cm in total length (including tail), presumed to have been an adult. The presence of some larger scales on top of its head and a longer tail are the traits Tanner (1966) suggested are primitive. Mostly on this basis, his opinion was that this species is most closely related to C. stejnegeri, though its head and body are not as slender as those of C. stejnegeri.

Geographic range

C. lannomi is found in western Mexico in the Mexican states of Colima and Jalisco. The type locality is "1.8 miles west of the pass, Puerto Los Mazos, or 22 miles west by road from the Río Tuxcacuesco, a branch of the Río América on Mexican Highway No. 80, Jalisco, Mexico".

Conservation status

The species C. lannomi is classified as Data Deficient on the IUCN Red List (v3.1, 2001). Species] are listed as such when information is inadequate to make a direct, or indirect, assessment of its risk of extinction based on its distribution and/or population status. It may be well studied, and its biology well known, but appropriate data on abundance and/or distribution are lacking. Data Deficient is therefore not a category of threat. Listing of taxa in this category indicates more information is required and acknowledges the possibility that future research will show a threatened classification is appropriate. It is important to make positive use of whatever data are available. In many cases great care should be exercised in choosing between DD and a threatened status. If the range of a taxon is suspected to be relatively circumscribed, and a considerable period of time has elapsed since the last record of the taxon, threatened status may well be justified. The population trend was unknown when assessed in 2007.

Rediscovery

In July 2008, the Autlán rattlesnake was rediscovered in the foothills of Colima, Mexico.

References

References

1. Ponce-Campos, P.. (2007). "''Crotalus lannomi ''".
2. [[species:Roy Wallace McDiarmid. McDiarmid RW]], [[Jonathan A. Campbell. Campbell JA]], [[species:T'Shaka A. Touré. Touré TA]] (1999). ''Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1''. Washington, District of Columbia: Herpetologists' League. 511 pp. {{ISBN. 1-893777-00-6 (series). {{ISBN. 1-893777-01-4 (volume).
3. {{ITIS
4. Campbell JA, [[species:William W. Lamar. Lamar WW]] (2004). ''The Venomous Reptiles of the Western Hemisphere''. Ithaca and London: Comstock Publishing Associates. 870 pp., 1,500 plates. {{ISBN. 0-8014-4141-2.
5. [[species:Bo Beolens. Beolens, Bo]]; [[species:Michael Watkins. Watkins, Michael]]; [[species:Michael Grayson. Grayson, Michael]] (2011). ''The Eponym Dictionary of Reptiles''. Baltimore: Johns Hopkins University Press. xiii + 296 pp. {{ISBN. 978-1-4214-0135-5. (''Crotalus lannomi'', p. 151).
6. {{Redlist species. (13 September). (2007)
7. {{Redlist CC2001. (13 September). (2007)
8. [[species:Jacobo Reyes-Velasco. Reyes-Velasco, Jacobo]]; [[species:Christoph I. Grünwald. Grünwald, Christoph I.]]; [[species:Jason M. Jones. Jones, Jason M.]]; Weatherman, Ginny N. (2010), [http://www.crotalus.com/Crotalus_lannomi_Rediscovery.pdf "Rediscovery of the Rare Autlán Long-Tailed Rattlesnake, ''Crotalus lannomi'' "] {{Webarchive. link. (2011-07-08 . ''Herpetological Review'' '''41''' (1): 19-25. – Over the course of several weeks in July 2008, five additional specimens of long-tailed rattlesnakes were found in the foothills of Colima, México. Based on features of lepidosis, this new material is referred to ''Crotalus lannomi''. The snakes were found approximately 50 km SW of the type locality.)