Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)

Dental anomalies are described after analyzing series of skulls and mandibles of three species of South American marsupials: the monito del monte {Dromiciops gliroides), the silky shrew-opossum {Caenolestes fuliginosus) and the Chilean shrew-opossum {Rhyncholestes raphanurus). The anomalies are clas...

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Autor principal:	MARTIN,GABRIEL M
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2007
Materias:	dental anomalies Dromiciops Caenolestes Rhyncholestes
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400001
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id	oai:scielo:S0716-078X2007000400001
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spelling	oai:scielo:S0716-078X20070004000012008-03-18Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)MARTIN,GABRIEL M dental anomalies Dromiciops Caenolestes Rhyncholestes Dental anomalies are described after analyzing series of skulls and mandibles of three species of South American marsupials: the monito del monte {Dromiciops gliroides), the silky shrew-opossum {Caenolestes fuliginosus) and the Chilean shrew-opossum {Rhyncholestes raphanurus). The anomalies are classified into three categories: (1) supernumerary or missing teeth in normal positions of the dental series, (2) morphological anomalies like teeth fusion or anomalous crown shape, and (3) presence of teeth in unusual positions. Cusp fusion and supernumerary teeth at the end of the toothrow have been observed predominantly in D. gliroides. A tendency to find supernumerary or missing teeth is observed between the procumbent incisors and the second lower premolars in caenolestids. Possible causes for these anomalies and their morphofunctional value are discussed. A comparison with other marsupials is presented and discussed. Isolation of local populations and its effects on genetic drift processes might explain the high percentage of dental anomaliesinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.80 n.4 20072007-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400001en10.4067/S0716-078X2007000400001
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	dental anomalies Dromiciops Caenolestes Rhyncholestes
spellingShingle	dental anomalies Dromiciops Caenolestes Rhyncholestes MARTIN,GABRIEL M Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)
description	Dental anomalies are described after analyzing series of skulls and mandibles of three species of South American marsupials: the monito del monte {Dromiciops gliroides), the silky shrew-opossum {Caenolestes fuliginosus) and the Chilean shrew-opossum {Rhyncholestes raphanurus). The anomalies are classified into three categories: (1) supernumerary or missing teeth in normal positions of the dental series, (2) morphological anomalies like teeth fusion or anomalous crown shape, and (3) presence of teeth in unusual positions. Cusp fusion and supernumerary teeth at the end of the toothrow have been observed predominantly in D. gliroides. A tendency to find supernumerary or missing teeth is observed between the procumbent incisors and the second lower premolars in caenolestids. Possible causes for these anomalies and their morphofunctional value are discussed. A comparison with other marsupials is presented and discussed. Isolation of local populations and its effects on genetic drift processes might explain the high percentage of dental anomalies
author	MARTIN,GABRIEL M
author_facet	MARTIN,GABRIEL M
author_sort	MARTIN,GABRIEL M
title	Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)
title_short	Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)
title_full	Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)
title_fullStr	Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)
title_full_unstemmed	Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)
title_sort	dental anomalies in dromiciops gliroides (microbiotheria, microbiotheriidae), caenolestes fuliginosus and rhyncholestes raphanurus (paucituberculata, caenolestidae)
publisher	Sociedad de Biología de Chile
publishDate	2007
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400001
work_keys_str_mv	AT martingabrielm dentalanomaliesindromiciopsgliroidesmicrobiotheriamicrobiotheriidaecaenolestesfuliginosusandrhyncholestesraphanuruspaucituberculatacaenolestidae
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Dental anomalies in Dromiciops gliroides (Microbiotheria, Microbiotheriidae), Caenolestes fuliginosus and Rhyncholestes raphanurus (Paucituberculata, Caenolestidae)

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