Sorex ornatus juncensis
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| Sorex ornatus juncensis | ||||||||||||
| Nelson & Goldman , 1909 |
Sorex ornatus juncensis (English common name Tule Shrew ) is an extremely rare subspecies of the beautiful shrew ( Sorex ornatus ). It occurs on the Baja California peninsulaand was thought to be extinct for a long time.
features
The holotype , a young adult female, has a total length of 101 mm, a tail length of 41 mm and a hind foot length of 12.5 mm. The condylobasal length of the skull is 16.2 mm, the basal length 13.9 mm, the mastoid width 7.5 mm, the palatal length 7.2 mm and the interorbital width 3.5 mm. Compared to the shrew, the skull is taller, narrower and less flattened. The tail is a little longer and the feet are darker. The top and the flanks are gray or a little darker. The underside is smoky gray with a hazel-brown and wine-leather-colored wash. The tail is indistinctly two-tone, with a gray and wood-brown colored top and a light ocher-buff colored underside.
distribution
Tule Shrew is in Santo Tomas in the plain of San Quintin on the west coast of Baja California endemic .
status
Sorex ornatus juncensis was only known from four specimens collected in September 1905 by Edward William Nelson and Edward Alphonso Goldman and one specimen from 1926, which was later also assigned to this subspecies. Attempts by Laurence Markham Huey in the 1940s and by Jesús E. Maldonado in 1991 to rediscover this taxon remained unsuccessful. Maldonado also noted that the terra typica , the salt marshes of El Socorro, had been largely drained due to housing construction and considered Sorex ornatus juncensis to be probably extinct. During a long-term study from 2013 to 2015, the scientists Issac Camargo and Sergio Ticul Alvarez-Castañeda succeeded in rediscovering this subspecies when they found a dead specimen in Santo Tomas on the San Quintin plain in November 2015.
literature
- Edward W. Nelson, Edward A. Goldman: Eleven new mammals from Lower California. In: Proceedings of the Biological Society of Washington. Vol. 22, 1909, ISSN 0006-324X , pp. 23-28, digitized .
- Hartley HT Jackson: A taxonomic review of the American longtailed shrews (genera Sorex and Microsorex) (= North American Fauna. Vol. 51, ISSN 0078-1304 ). United States Government Printing Office , Washington DC 1928, p. 172.
- Leslie N. Carraway: Shrews (Eulypotyphla: Soricidae) of Mexico. In: Monographs of the Western North American Naturalist. Vol. 3, No. 1, 2007, ZDB -ID 2099798-X , pp. 1-91, doi : 10.3398 / 1545-0228-3.1.1 .
Individual evidence
- ↑ Jesús E. Maldonado: Family Soricidae. In: Sergio Ticul Alvarez-Castañeda, James L. Patton (eds.): Mamíferos del noroeste de México. Volume 2. CIB, La Paz - Baja California Sur - México 2000, ISBN 970-18-5275-3 , pp. 39-52.
- ^ Issac Camargo, Sergio Ticul Álvarez-Castañeda: Rediscovery of the extinct Tule shrew (Sorex ornatus juncencis) in the San Quintin plains: a taxonomic reevaluation after 90 years without new records . Mammalia 2018