Akodon spegazzinii
Akodon spegazzinii | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Mammalia |
Order: | Rodentia |
Family: | Cricetidae |
Subfamily: | Sigmodontinae |
Genus: | Akodon |
Species: | A. spegazzinii
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Binomial name | |
Akodon spegazzinii Thomas, 1897
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Collection localities of Akodon spegazzinii[2] | |
Synonyms[3] | |
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Akodon spegazzinii, also known as Spegazzini's akodont
Akodon spegazzinii is medium in size for the A. boliviensis species group. The coloration of its upperparts varies considerably, from light to dark and from yellowish to reddish brown. The underparts are yellow-brown to gray. The eyes are surrounded by a ring of yellow fur. The
Taxonomy
Akodon spegazzinii was first described in 1897 from
In 1961, Cabrera listed both spegazzinii and tucumanensis as subspecies of Akodon boliviensis, with alterus as a full synonym of A. boliviensis tucumanensis.[4] In 1990, Philip Myers and colleagues reviewed the Akodon boliviensis species group. They provisionally kept Akodon spegazzinii as a species separate from A. boliviensis, with tucumanensis as a subspecies, and suggested that alterus was likely related to spegazzinii and tucumanensis.[9] Subsequently, the treatment of these species in systematic works became variable. A 1992 paper suggested that alterus and tucumanensis were, at best, very similar to each other,[10] but in 1997, Michael Mares and colleagues listed each of the three as distinct species in a compendium of the mammals of Catamarca, citing differences in habitat and fur coloration.[11] They were followed by Mónica Díaz and Rubén Bárquez in 2007, among others.[12] In 2000 Díaz and colleagues listed alterus and tucumanensis as subspecies of spegazzinii in a review of the mammals of Salta.[13] Guy Musser and Michael Carleton, in the 2005 third edition of Mammal Species of the World, also considered the three to represent the same species,[4] as did Ulyses Pardiñas and colleagues in a 2006 review of Argentinean Akodontini.[14] Meanwhile, Carlos Galliari and Pardiñas had recognized Akodon leucolimnaeus as a true Akodon, not a Necromys, in 1995. Although associated with the Akodon boliviensis group, its precise status remained unclear.[15] The common name "Catamarca akodont" was proposed for this species.[8]
In 1980, Julio Contreras and María Rosi
In 2010, Pablo Jayat and colleagues reviewed the members of the
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Relationships within the Akodon boliviensis species group according to analysis of data from the cytochrome b gene[23] |
According to
Description
The species is intermediate in size for the Akodon boliviensis species group; it is smaller than A. polopi and A. sylvanus, but larger than A. boliviensis and A. caenosus.
The coloration of the upperparts is generally uniform, with some scattered darker hairs. There is a yellow ring around the eyes,[22] which is more prominent than in A. sylvanus.[28] The underparts are not strongly demarcated from the upperparts in color and are yellow-brown to gray. There are some scattered white hairs on the chin.[22] Although this white spot is better developed than in A. sylvanus, A. spegazzinii lacks the conspicuous white spot seen in A. simulator.[28] The color of the feet ranges from white and yellow-brown to gray. Ungual tufts of hairs cover the claws; these hairs are grayish-brown at the bases and whitish at the tips. The amount of hair on the tail is variable, but it is dark brown above and white to yellow-brown below.[22] High-altitude animals tend to have hairier ears and tails.[21]
In the skull, the front part (rostrum) is large,[21] but not as long as in A. budini.[28] The skull is more robust than in the very similar Akodon boliviensis,[29] but less so than in A. simulator.[28] The hourglass-shaped interorbital region (between the eyes)[21] is narrower than in A. caenosus[30] and not as squared as in A. polopi.[31] Members of the Akodon varius group, with which Akodon oenos was formerly associated, tend to have much broader interorbital regions.[32] The braincase is somewhat inflated and bears well-developed temporal and lambdoid crests[22] relative to the situation in A. caenosus;[30] Akodon polopi has even better developed crests.[31]
Although the
The
The
Distribution and ecology
Akodon spegazzinii is found in northwestern Argentina, in the provinces of Salta, Catamarca, Tucumán, La Rioja, and Mendoza, at altitudes of 400 to 3,500 m (1,300 to 11,500 ft).
Although reproduction occurs around the year, there is a peak during the summer (November to April).
Conservation status
Akodon spegazzinii is listed as "
References
- ^ . Retrieved 17 November 2021.
- ^ Jayat et al., 2010; Pardiñas et al., 2011
- ^ Jayat et al., 2010, p. 28; Pardiñas et al., 2011
- ^ a b c d Musser and Carleton, 2005, p. 1099
- ^ Thomas, 1897, pp. 214, 216; Beolen et al., 2009, p. 387; Musser and Carleton, 2005, p. 1099
- ^ Allen, 1901, pp. 410–411; Musser and Carleton, 2005, p. 1090
- ^ Thomas, 1919, pp. 496–497
- ^ a b Musser and Carleton, 2005, p. 1095
- ^ Myers et al., 1990, p. 62
- ^ a b c Jayat et al., 2010, p. 32
- ^ Mares et al., 1997, pp. 113, 115–116
- ^ Díaz and Barquez, 2007, pp. 485, 489; Jayat et al., 2010, p. 32
- ^ Díaz et al., 2000, p. 24
- ^ Pardiñas et al., 2006, p. 155
- ^ Jayat et al., 2010, p. 32; Musser and Carleton, 2005, p. 1095
- ^ a b Pardiñas et al., 2011, p. 47
- ^ Braun et al., 2000, p. 216
- ^ Braun et al., 2000, p. 218
- ^ Musser and Carleton, 2005, p. 1097
- ^ Duff and Lawson, 2004
- ^ a b c d e f g h i j k Jayat et al., 2010, p. 29
- ^ a b c d e f g h Jayat et al., 2010, p. 28
- ^ a b Jayat et al., 2010, fig. 1; D'Elía et al., 2011, fig. 6; Pardiñas et al., 2011, fig. 1
- ^ Musser and Carleton, 2005
- ^ a b Jayat et al., 2010, table 1
- ^ Jayat et al., 2010, p. 30; Musser and Carleton, 2005, pp. 1094, 1099
- ^ Pardiñas et al., 2011, p. 56
- ^ a b c d e f g Jayat et al., 2010, p. 30
- ^ Jayat et al., 2010, p. 21
- ^ a b c Jayat et al., 2010, p. 24
- ^ a b c Jayat et al., 2010, p. 42
- ^ a b Pardiñas et al., 2011, p. 55
- ^ Jayat et al., 2010, pp. 24, 29
- ^ Jayat et al., 2010, pp. 24, 29, 30
- ^ Jayat et al., 2010, p. 29; Pardiñas et al., 2011, p. 55
- ^ Pardiñas et al., 2011, p. 52
- ^ Pardiñas et al., 2011, p. 49
- ^ Jayat et al., 2010, p. 30; Pardiñas et al., 2011, p. 57
- ^ Jayat et al., 2010, p. 23
- ^ Jayat et al., 2007, p. 217
- ^ Ortiz and Pardiñas, 2001; Ortiz and Jayat, 2007, p. 641
- ^ a b c Jayat et al., 2010, p. 31
- ^ Braun et al., 2000, p. 223
- ^ Guglielmone et al., 2005
- ^ Lareschi et al., 2003, p. 61
- ^ Colombetti et al., 2010, p. 179
- ^ Pardiñas and D'Elía, 2008; Pardiñas and Jayat, 2008
Literature cited
- Allen, J. A. 1901. New South American Muridae and a new Metachirus. Bulletin of the American Museum of Natural History 14:405–412.
- Beolens, B., Watkins, M. and Grayson, M. 2009. The Eponym Dictionary of Mammals. Baltimore: The Johns Hopkins University Press, 591 pp. ISBN 978-0-8018-9304-9
- Braun, J. K., Mares, M. A. and Ojeda, R. A. 2000. A new species of grass mouse, genus Akodon (Muridae: Sigmodontinae), from Mendoza Province, Argentina. Zeitschrift für Säugetierkunde 65:216–225.
- Colombetti, P. L., Autino, A. G., Claps, G. L., Carma, M. I. and Lareschi, M. 2008. Primera cita de Cleopsylla townsendi (Siphonaptera: Stephanocircidae: Craneopsyllinae) en la Argentina. Revista de la Sociedad Entomológica de Argentina 67(1–2):179–182 (in Spanish).
- D'Elía, G., Jayat, J. P., Ortiz, P. E., Salazar-Bravo, J. and Pardiñas, U. F. J. 2011. Akodon polopi Jayat et al., 2010 is a senior subjective synonym of Akodon viridescens Braun et al., 2010 (first page). Zootaxa 2744:62–64.
- Díaz, M. M. and Barquez, R.M. 2007. The wild mammals of Jujuy Province, Argentina: Systematics and distribution. University of California Publications in Zoology 134:417–578.
- Díaz, M. M., Braun, J. K., Mares, M. A. and Barquez, R. M. 2000. An update of the taxonomy, systematics, and distribution of the mammals of Salta Province, Argentina. Occasional Papers, Sam Noble Oklahoma Museum of Natural History 10:1–52.
- Duff, A. and Lawson, A. 2004. Mammals of the World: A checklist. New Haven: A & C Black, 312 pp. ISBN 0-7136-6021-X
- Guglielmone, A. A., González-Acuña, D., Autino, A. G., Venzal, J. M., Nava, S. and Mangold, A. J. 2005. Ixodes sigelos Keirans, Clifford & Corwin, 1976 (Acari: Ixodidae) in Argentina and southern Chile. Systematic & Applied Acarology 10:37–40.
- Jayat, J.; Pardinas, U. (2017) [errata version of 2016 assessment]. "Akodon spegazzinii". IUCN Red List of Threatened Species. 2016: e.T48302281A115401062.
- Jayat, J. P., Ortiz, P. E., Pardiñas, U. F. J. and D'Elía, G. 2007. Redescripción y posición filogenética del ratón selvático Akodon sylvanus (Rodentia: Cricetidae: Sigmodontinae). Mastozoología Neotropical 14(2):201–225 (in Spanish).
- Jayat, J. P., Ortiz, P. E., Salazar-Bravo, J., Pardiñas, U. F. J. and D'Elía, G. 2010. The Akodon boliviensis species group (Rodentia: Cricetidae: Sigmodontinae) in Argentina: species limits and distribution, with the description of a new entity (abstract). Zootaxa 2409:1–61.
- Lareschi, M., Autino, A. G., Díaz, M. M., and Barquez, R. M. 2003. New host and locality records for mites and fleas associated with wild rodents from northwestern Argentina. Revista de la Sociedad Entomológica de Argentina 62(3–4):60–64.
- Mares, M. A., Ojeda, R. A., Braun, J. K. and Barquez, R. M. 1997. Systematics, distribution and ecology of the mammals of Catamarca Province, Argentina. Pp. 89–141 in Mares, M. A., Ojeda, R. A., Braun, J. K. and Barquez, R. M. (eds.). Life Among the Muses: Papers in Honor of James S. Findley. Albuquerque: The Museum of Southwestern Biology, 290 pp. ISBN 1-879824-03-5
- OCLC 62265494.
- Myers, P., Patton, J. L. and Smith, M. F. 1990. A review of the boliviensis group of Akodon (Muridae: Sigmodontinae), with emphasis on Peru and Bolivia. Miscellaneous Publications, Museum of Zoology, University of Michigan 177:1–104.
- Ortiz, P. E. and Jayat, J. P. 2007. Sigmodontinos (Rodentia: Cricetidae) del límite Pleistoceno-Holoceno en el valle de Tafí (Tucumán, Argentina): taxonomía, tafonomía y significación paleoambiental. Ameghiniana 44(4):641–660 (in Spanish).
- Ortiz, P. E. and Pardiñas, U. F. J. 2001. Sigmodontinos (Mammalia: Rodentia) del Pleistoceno tardío del valle de Tafí (Tucumán, Argentina): taxonomía, tafonomía y reconstrucción paleoambiental. Ameghiniana 38:3–26 (in Spanish).
- Pardiñas, U. and D'Elía, G. 2008. Akodon oenos. In IUCN. IUCN Red List of Threatened Species. Version 2010.2. <www.iucnredlist.org>. Downloaded on February 5, 2011.
- Pardiñas, U. and Jayat, J. P. 2008. Akodon leucolimnaeus. In IUCN. IUCN Red List of Threatened Species. Version 2010.2. <www.iucnredlist.org>. Downloaded on February 5, 2011.
- Pardiñas, U. F. J., D'Elía, G., Teta, P., Ortiz, P. E., Jayat, P. J. and Cirignoli, S. 2006. Tribu Akodontini Vorontsov, 1959 (sensu D'Elía, 2003). Pp. 146–166 in Pardiñas, U. F. J., D'Elía, G., Teta, P., Ortiz, P. E., Jayat, P. J., and Cirignoli, S. (eds.). Mamíferos de Argentina: Sistemática y distribución. SAREM, 359 pp. (in Spanish). ISBN 987-98497-1-X
- Pardiñas, U. F. J., Teta, P., D'Elía, G. and Diaz, G. B. 2011. Taxonomic status of Akodon oenos (Rodentia, Sigmodontinae), an obscure species from West Central Argentina (abstract). Zootaxa 2749:47–61.
- Thomas, O. 1897. On some small mammals from Salta, N. Argentina. Annals and Magazine of Natural History (6)20:214–218.
- Thomas, O. 1919. On small mammals from "Otro Cerro", north-eastern Rioja, collected by Sr. L. Budin. Annals and Magazine of Natural History (9)3:489–500.
External links
- Media related to Akodon spegazzinii at Wikimedia Commons
- Data related to Akodon spegazzinii at Wikispecies