Pilbaranhiiruli

Pseudomys chapmani és una espècie de rosegador de la família dels múrids. És endèmic de Pilbara (Austràlia Occidental). El seu hàbitat natural són els herbassars. Es creu que no hi ha cap amenaça significativa per a la supervivència d'aquesta espècie.^[1] Aquest tàxon fou anomenat en honor del naturalista australià Andrew Chapman.^[2]

Referències

Western pebble-mound mouse or Ngadji (Pseudomys chapmani) is a burrowing and mound building rodent in the family Muridae. They occur in the Pilbara, a remote region in the northwest of Australia.

Taxonomy

The species was described by D.J. Kitchener in 1980.^[2] The population was formerly assumed to be species Pseudomys hermannsburgensis. The description is based on a specimen that was collected at Mount Meharry (West Angelas Mine Site).^[3] The specific honours the biologist Andrew Chapman, who worked at the mammal department of the W.A. Museum.^[2]

The common name according to the Census of Australian Vertebrates (ABRS 2001) is "Pebble-mound Mouse",^[4] a name given to sister taxon P. hermannsburgensis and so appended with 'Western' by the author of the species and others in later publications.^[5] The earlier name of 'sandy inland mouse' became applied in treatments as P. hermannsburgensis. The extant name of the animal in the language of its region is Ngadji.^[6]

The type specimen was collected by J.N. Dunlop in 1979, using a pit trapping method. A revision by Kitchener of specimens in the collection at the W.A. museum revealed morphological differences, observed in the Dunlop specimen, in previous collections of P. hermannsburgensis, including those made at Woodstock Homestead in the Pilbara.^[2]

Description

The colour of the mouse's pelt is buff brown, darker to blackish at the head. The paws are white beneath and buff above, The underparts are white, up to the throat and mouth. The species resembles the related P. hermannburgensis, the morphology is distinguished by smaller ears, feet and tail. The feet do not exceed 16 millimetres in length.^[3]

Habitat

a mound, foreground centre, amongst Triodia hummocks in the Pilbara region

It is native to and found only in Western Australia, where it lives in pebbly soils in arid tussock grassland and acacia woodland. Like other pebble-mound mice, the western pebble-mound mouse creates its own microhabitat by scattering a mound of pebbles around its burrows. The air temperature around the pebbles warms up faster in the morning than the pebbles themselves, causing the formation of small droplets of dew by condensation.

The vegetation at the preferred habitat, hummock grasslands, is Triodia basedowii, Cassia. Acacia and Ptilotus, and it is associated with eroding sands at natural features which expose small stones (pebbles).^[3] The species at the type location were the spinifex Triodia basedowii and T. pungens, Acacia aneura, and Cassia desolata and C. helmsii, these cassias intermittently occur with Eucalyptus gamophylla and E. oleosa at the surrounding gibber plain.^[2]

Status

The species occurs as disjunct populations within its range. The range is subject to changes in land use resulting in loss of habitat, and noted as contracting.^[3]

According to the 2008 IUCN Red List of Threatened Species, the species is restricted to the non-coastal, central and eastern parts of the Pilbara, Western Australia. It was formerly more widespread.

References

• "Species Pseudomys chapmani Kitchener, 1980". Australian Faunal Directory. Department of Energy and Environment. Retrieved 13 November 2018. Taxonomic Decision for Subspecies Arrangement: Condon, H.T. 1975.
  • Condon, D.J. (1975). Checklist of the Birds of Australia. Part 1 Non-Passerines. Melbourne: Royal Australasian Ornithologists Union. pp. 196–97.
• Musser, G.G.; Carleton, M.D. (2005). "Superfamily Muroidea". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 1455. ISBN 978-0-8018-8221-0. OCLC 62265494.

Pseudomys chapmani Pseudomys generoko animalia da. Karraskarien barruko Murinae azpifamilia eta Muridae familian sailkatuta dago.

Erreferentziak

• Pseudomys chapmaniri buruzko informazioa Mammals of The World datubasean

Ikus, gainera

• Pseudomys
• Muridae

Il topo dei tumuli di ghiaia occidentale (Pseudomys chapmani Kitchener, 1980) è un roditore della famiglia dei Muridi endemico dell'Australia.^[1][2]

Descrizione

Roditore di piccole dimensioni, con la lunghezza della testa e del corpo tra 52,2 e 67,7 mm, la lunghezza della coda tra 63,6 e 94,4 mm, la lunghezza del piede tra 15,1 e 17,2 mm, la lunghezza delle orecchie tra 9,2 e 11,6 mm e un peso fino a 16,7 g.^[3]
Il corpo è snello e gracile. Le parti superiori sono bruno-giallastre, più grigiastre sul capo e sulla schiena. La testa è allungata e appiattita, gli occhi sono relativamente piccoli, il muso è stretto, le orecchie sono proporzionalmente piccole. Le parti ventrali sono bianche. Le mani e i piedi sono color carne. La coda è più lunga della testa e del corpo ed è uniformemente bruno-rosacea.

Biologia

Comportamento

Si rifugia in sistemi complessi di cunicoli e tane sotto ammassi di pietra raccolte in superficie.

Riproduzione

Le femmine danno alla luce fino a 4 piccoli diverse volte l'anno.

Distribuzione e habitat

Questa specie è diffusa nelle zone interne del Pilbara, Australia Occidentale. In passato l'areale era più ampio, comprendendo anche le zone costiere e meridionali.

Vive in praterie e in aree rocciose anche prive di terreno e nel sottobosco di boschi di Acacia.

Stato di conservazione

La IUCN Red List, considerato il vasto areale, la presenza in diverse aree protette e la popolazione numerosa, classifica P.chapmani come specie a rischio minimo (LC).^[1]

Note

Bibliografia

• Peter Menkhorst & Frank Knight, A Field Guide to the Mammals of Australia, Oxford University Press, USA, 2001, ISBN 9780195508703.

Pseudomys chapmani is een knaagdier uit het geslacht Pseudomys dat voorkomt in Australië. Zijn verspreidingsgebied beslaat het Pilbara-gebied in het noordwesten van West-Australië. Daar leeft hij op heuvelhellingen bedekt met stenen en grasland. Deze soort leeft in complexe holsystemen.

P. chapmani is een kleine muis met een lang, plat hoofd, een smalle snuit, korte oren en kleine ogen. De rug is lichtbruin, de onderkant wit, met een scherpe scheiding. De staart is licht rozebruin. De kop-romplengte bedraagt 52 tot 68 mm, de staartlengte 63 tot 94 mm, de achtervoetlengte 15 tot 17 mm, de oorlengte 9 tot 12 mm en het gewicht 8 tot 17 gram. Vrouwtjes hebben 0+2=4 mammae.

Literatuur

• Menkhorst, P. & Knight, F. 2001. A Field Guide to the Mammals of Australia. South Melbourne: Oxford University Press.

Pseudomys chapmani é uma espécie de roedor da família Muridae.

Apenas pode ser encontrada na Austrália.

Referências

• (em inglês) Rodent Specialist Group 1996. Pseudomys chapmani. 2006 IUCN Red List of Threatened Species. Dados de 9 de Julho de 2007.

Pseudomys chapmani^[2] är en däggdjursart som beskrevs av Darrell J. Kitchener 1980. Pseudomys chapmani ingår i släktet australmöss och familjen råttdjur.^[3][4] IUCN kategoriserar arten globalt som livskraftig.^[1] Inga underarter finns listade i Catalogue of Life.^[3]

Denna förekommer i västra Australien. Den lever i klippiga regioner med ett täcke av gräs och med några buskar av släktet Acacia. Individerna bildar familjegrupper och lever i underjordiska bon. Per år föds flera kullar med cirka fyra ungar per kull.^[1]

Källor

1. ^ [a b c] 2008 Pseudomys chapmani Från: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2 <www.iucnredlist.org>. Läst 2012-10-24.
2. ^ Wilson, Don E., and DeeAnn M. Reeder, eds. (2005) , Mammal Species of the World: A Taxonomic and Geographic Reference, 3rd ed., Pseudomys chapmani
3. ^ [a b] Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.) (5 april 2011). ”Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist.”. Species 2000: Reading, UK. http://www.catalogueoflife.org/annual-checklist/2011/search/all/key/pseudomys+chapmani/match/1. Läst 24 september 2012.
4. ^ ITIS: The Integrated Taxonomic Information System. Orrell T. (custodian), 2011-04-26

Pseudomys chapmani là một loài động vật có vú trong họ Chuột, bộ Gặm nhấm. Loài này được Kitchener mô tả năm 1980.^[1]

Chú thích

Tham khảo

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