Point Arena mountain beaver (Aplodontia rufa nigra)
Where Listed: WHEREVER FOUND
Mountain beavers are the only extant member of the family Aplodontidae, and are considered the most primitive living rodents. Mountain beavers are stout, compact and cylindrical and have a broad, massive, laterally compressed skull. They average about one foot in length and two to four pounds in weight. Mountain beavers have small eyes, rounded ears, and a distinctive cylindrical stump of a tail. Each forepaw has an opposable thumb and all digits have long curved claws for digging. Mountain beavers are not closely related to true beavers (Castor spp.), which are semi-aquatic. The Point Arena mountain beaver is one of seven subspecies of mountain beaver. Certain cranial and other characteristics separate the Point Arena mountain beaver from other subspecies of mountain beavers. The most obvious of these characteristics is the unique blackish coloration.
- States/US Territories in which the Point Arena mountain beaver, Wherever found is known to or is believed to occur: California
- US Counties in which the Point Arena mountain beaver, Wherever found is known to or is believed to occur: View All
- Additional species information
|Status||Date Listed||Lead Region||Where Listed|
|1991-12-12||California/Nevada Region (Region 8)||Wherever found|
» Federal Register Documents
|1991-02-15 00:00:00.0||56 FR 6353 6359||ETWP; Aplodontia rufa nigra (Point Arena Mountain Beaver) Proposed as Endangered; 56 FR 6353 6359|
|2010-05-21 00:00:00.0||75 FR 28636 28642||Initiation of 5-Year Reviews of 34 Species in California and Nevada; Availability of 96 Completed 5-Year Reviews in California and Nevada|
|2008-03-05 00:00:00.0||73 FR 11945 11950||Initiation of 5-Year Reviews of 58 Species in California and Nevada; Availability of Completed 5-Year Reviews in California, Nevada and Southern Oregon|
|1991-12-12 00:00:00.0||56 FR 64716 64723||ETWP; Aplodontia rufa nigra (Point Arena Mountain Beaver) Determined to be Endangered; 56 FR 64716 64723|
|2013-04-01 00:00:00.0||78 FR 19510 19514||Initiation of 5-Year Reviews of 56 Species in California and Nevada; request for information|
|Date||Title||Plan Action Status||Plan Status|
|1998-06-02||Point Arena Mountain Beaver Aplodontia rufa nigra (Rafinesque) Recovery Plan||View Implementation Progress||Final|
|Date||Citation Page||Title||Document Type|
|2008-03-05||73 FR 11945 11950||Initiation of 5-Year Reviews of 58 Species in California and Nevada; Availability of Completed 5-Year Reviews in California, Nevada and Southern Oregon||
|2013-04-01||78 FR 19510 19514||Initiation of 5-Year Reviews of 56 Species in California and Nevada; request for information||
|2010-05-21||75 FR 28636 28642||Initiation of 5-Year Reviews of 34 Species in California and Nevada; Availability of 96 Completed 5-Year Reviews in California and Nevada||
|2009-04-01||Point Arena Mountain Beaver 5-Year Review|
» Critical Habitat
No critical habitat rules have been published for the Point Arena mountain beaver.
» Conservation Plans
|HCP Plan Summaries|
|AT&T - Point Arena Mountain Beaver Low Effect|
|Mendocino Redwood Company|
» Life History
No Life History information has been entered into this system for this species.
» Other Resources
NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.