Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Upper molar morphology and relationships among higher taxa in bats

Maria Paula Aguiar Fracasso, Leandro de Oliveira Salles, Fernando Araújo Perini and Burton K. Lim
Journal of Mammalogy
Vol. 92, No. 2 (April 2011), pp. 421-432
Stable URL: http://www.jstor.org/stable/23260105
Page Count: 12
  • Read Online (Free)
  • Download ($42.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available
Preview not available

Abstract

We reviewed topographical homologies in the upper tooth morphology of bats and analyzed the implications to relationships among higher taxa within Chiroptera. A standardized terminology for the upper molars of bats is proposed, taking into consideration the nomenclature adopted for tribosphenic mammals. Major patterns of variation in crown morphology of chiropteran upper molars were reevaluated, and 2 new structures were identified: mesoconule and mesoconule crista. The main controversies in the literature regarding terminology and structural identity in the upper molars of chiropterans are discussed. Forty-eight dental morphological characters are presented for extant bats and the extinct Icaronycteridae, with the exception of Pteropodidae, which has lost the tribosphenic dental pattern. These were combined with 191 characters of other morphological systems from the literature. The tree obtained from parsimony analyses mostly agrees with previous proposals based on morphology. However, major differences were found: the position of Noctilionoidea at the base of the radiation of modern microchiropterans, which formed a trichotomy with Yinochiroptera (including Emballonuridae) and the remaining Yangochiroptera; Antrozoinae disassociated from the other Vespertilionidae, forming a poorly supported clade with Mystacinidae and Molossidae; and the relationship between the sister taxa Myotinae and Miniopterinae within Vespertilionidae. Nós revisamos as homologias topográficas relativas à morfologia da dentição superior de morcegos e analisamos suas implicações nas relações filogenéticas entre grandes grupos de Chiroptera. É proposta uma padronização da terminologia dos molares superiores de morcegos, levando em consideração a nomenclatura padrão adotada para os mamíferos tribosfênicos. Os principais padrões de variação da morfologia da coroa dos molares superiores de quirópteros foram reavaliados, e 2 novas estruturas foram identificadas: mesocônule e crista mesoconular. São também discutidas as principais controvérsias na literatura com relação à terminologia e identidade estrutural dos molares superiores dos quirópteros. São apresentados quarenta e oito caracteres morfológicos dentários presentes nas famílias de morcegos viventes, com exceção de Pteropodidae, que apresenta uma grande modificação do padrão dentário tribosfênico original, e na família extinta Icaronycteridae. Estes caracteres foram combinados com 191 caracteres de outros complexos morfológicos obtidos a partir da literatura. A árvore obtida a partir de análises de parcimônia concorda, em grande parte, com propostas anteriores baseadas em morfologia. No entanto, diferenças consideráveis foram encontradas: a posição do Noctilionoidea na base da radiação dos microquirópteros modernos, formando uma tricotomia com Yinochiroptera (incluindo Emballonuridae) e os demais Yangochiroptera; Antrozoinae dissociada dos demais Vespertilionidae, formando um clado pouco suportado com Mystacinidae e Molossidae; e a relação entre os grupos-irmãos Myotinae e Miniopterinae dentro de Vespertilionidae.

Page Thumbnails

  • Thumbnail: Page 
421
    421
  • Thumbnail: Page 
422
    422
  • Thumbnail: Page 
423
    423
  • Thumbnail: Page 
424
    424
  • Thumbnail: Page 
425
    425
  • Thumbnail: Page 
426
    426
  • Thumbnail: Page 
427
    427
  • Thumbnail: Page 
428
    428
  • Thumbnail: Page 
429
    429
  • Thumbnail: Page 
430
    430
  • Thumbnail: Page 
431
    431
  • Thumbnail: Page 
432
    432