The chromosomes of<i>Lemniscomys barbarus</i>(Rodentia, Muridae)

Filippucci, Maria Grazia; Civitelli, Maria Vittoria; Capanna, Ernesto

doi:10.1080/11250008609355521

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…The morphology of the chromosomes is in agreement with the results obtained for specimens of L barbarus from Algeria by Filippucci, Civitelli and Capanna (1986). We here follow Carleton and Van der Straeten (1997) who distinguished the maghrebi and subsaharan forms of Lemniscomys, though both with 2N = 54 and NFa = 58, and assigned them respectively to L barbarus and L zebra.…”

Section: Mastomys Spsupporting

confidence: 78%

A cytotaxonomic survey of Rodents from Niger: implications for systematics, biodiversity and biogeography

Dobigny¹,

Nomao²,

Gautun³

2002

Mamm

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We here present an inventory of rodents from Niger, mainly based on cytotaxonomic data because of the presence of many groups providing sibling species. A total of 39 species are listed, one of which is a new chromosomal form (Talerillus sp.). Moreover, three other cytotypes already described but still not specifically attributed were found (Mastomys sp., Acomys sp. and Tatera sp). New karyotypic data are presented for Gerbillus nancillus, Graphiurus cf. pan^us, Massouteria mzabi, and Xerus erythropus. Once again, the efficiency of cytotaxonomy for small mammals inventories is enhanced.Specific distribution maps of poorly known species are thus completed. No clear gradients could be observed between what is currently defined as the West and the East African faunas. The distributions are mainly structured in a latitudinal manner. The Air massif appears as a continuous prolongation of the Sahelian area, rather than as a Sahelian refuge in the Sahara. Five biogeographical groups of species were distinguished: 1) a Sudanian group in the area receiving less than 700 mm rainfall, 2) a group of very widespread species largely overlapping the Sudanian (more than 700 mm rainfall) and the Sahelian areas, and sometimes including some Saharan localities, 3) a typical Saharan group, 4) some species infeoded to the mountainous Saharan area, and 5) few strictly commensal species. A global southward extension of several taxa confirms the desertification of the Sahel, as a result of both natural global warming and human activities.Resume. -Nous avons realise un inventaire des rongeurs du Niger qui s'appuie essentiellement sur des donnees cytotaxonomiques non ambigues ä cause de la presence de nombreux complexes d'especes jumelles. Trente neuf especes ont pu etre recensees, Tune d'entre-elles correspondant ä une nouvelle forme chromosomique de Taterillus. De plus, 3 cytotypes toujours sans attribution specifique ont ete retrouves (Mastomys sp., Tatera sp. et Acomys sp.) et des donnees caryotypiques nouvelles sont presentees pour Gerbillus nancillus, Graphiurus cf. parvus, Massouteria mzabi et Xerus erythropus. Les cartes de repartition de nombreuses especes peu connues Mammalia, t. 66, n° 4, 2002: 495-523. Brought to you by | The University of Auckland Library Authenticated Download Date | 5/27/15 5:28 AM 496 MAMMALIA sont completees. Aucun gradient n'est observe entre les faunes cTAfrique occidentale et celles d'Afrique Orientale, les especes se repartissant essentiellement en fonction de la latitude. Le massif de 1'A'ir apparait plutot comme un prolongement de la zone sahelienne que comme un refuge sahelien dans le Sahara. Parmi les especes de rongeurs inventoriees, cinq grands groupes biogeographiques peuvent etre distingues: 1) des especes infeodees ä la zone soudanienne recevant moins de 700 mm; 2) un groupe d'especes tres largement reparties de la zone soudanienne (plus de 700 mm) au nord de la zone sahelienne, et incluant parfois des localites sahariennes; 3) des especes typiquement sahariennes; 4) des especes infeodees ...

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Section: Mastomys Spsupporting

confidence: 78%

A cytotaxonomic survey of Rodents from Niger: implications for systematics, biodiversity and biogeography

Dobigny¹,

Nomao²,

Gautun³

2002

Mamm

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“…Two of them coming from Gamnaga were karyotyped and shown to possess 2n = 54 chromosomes, with NFa = 58, X submetacentric and Y metacentric (data not shown). These results are in agreement with available data for L. zebra in Southern Niger and Zakouma NP, Chad (Dobigny, unpublished), Tanzania (Castiglia et al 2002) as well as for L. barbarus in Algeria (Filipucci et al 1986). Four individuals from Gamnaga, Kossa and Zéra were sequenced (Genbank accession numbers HM635851-HM635854), and as expected, our sequence data (not shown) were clearly congruent in showing that striped rats from Northern Cameroon belong to the Sudanian species, L. zebra (Fig.…”

Section: Lemniscomyssupporting

confidence: 94%

A cytotaxonomic and DNA-based survey of rodents from Northern Cameroon and Western Chad

et al. 2011

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a b s t r a c tRodent diagnosis has long remained obscured by the co-existence of cryptic species in many lineages. However, alternative and accessible methods, such as cytotaxonomy and DNA-based methods, are now available that allow biologists to accurately monitor biodiversity through the production of well documented lists of unambiguously species-specific identifications. As a continuation of our previous surveys of West African rodents, we here present the first rodent inventory of rodents from Northern Cameroon (as well as one locality in Western Chad) that fully relies on karyotypic and/or sequencing data. Doing so, we assess the presence of 18 species in this poorly documented region. Among them, we found several African spiny mice that could be referred as to A. johannis, a poorly documented species. Moreover, several Arvicanthis individuals could be aggregated with previously studied but still enigmatic specimens of ANI-2 and ANI-4 sensu Volobouev et al. (2002a,b), thus suggesting that they may all belong to one single species, namely A. rufinus. In addition, one specimen was shown to belong to a new biological species (Praomys sp.) that will deserve further taxonomic investigations. Finally, several Taterillus specimens were found with 2n = 28-30 chromosomes and a XX/XY1Y2 sex chromosome system. On the basis of these new results as well as a reinterpretation of previously published data, we propose to refer these individuals as to the poorly documented Taterillus lacustris. Altogether, our data suggest that Northern Cameroon is a "phylogeographical node" for several rodent lineages which may be at least partly explained by the past changes within the Lake Chad basin. Keeping this in mind, there is little doubt that biodiversity will undergo important modifications in the coming decades, following the increasing aridity and the drastic reduction of Lake Chad.

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The rodent fauna of Tanzania: a cytotaxonomic report from the Maasai Steppe (1999)

Fadda

Castiglia

Senczuk

et al. 2001

Rend. Fis. Acc. Lincei

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The chromosomes ofLemniscomys barbarus(Rodentia, Muridae)

Cited by 6 publications

References 10 publications

A cytotaxonomic survey of Rodents from Niger: implications for systematics, biodiversity and biogeography

A cytotaxonomic survey of Rodents from Niger: implications for systematics, biodiversity and biogeography

A cytotaxonomic and DNA-based survey of rodents from Northern Cameroon and Western Chad

The rodent fauna of Tanzania: a cytotaxonomic report from the Maasai Steppe (1999)

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