Diversity and evolution of hunter-schreger band configuration in tooth enamel of perissodactyl mammals

Wighart Von Koenigswald, Luke Holbrook, Kenneth D. Rose

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Four different Hunter-Schreger Band (HSB) configurations were observed in the teeth of fossil and extant Perissodactyla. This variability exceeds that observed in Artiodactyla or Proboscidea. The four HSB configurations represent two different evolutionary pathways. Transverse HSB found in many mammalian taxa outside the Perissodactyla represents the most primitive HSB configuration. It occurs in several primitive perissodactyl families and is retained in Palaeotheriidae and extant Equidae. Curved HSB evolved from transverse HSB and occurs in Tapiridae, Helaletidae, and Lophiodontidae, as well as in Ancylopoda and Titanotheriomorpha. This likely indicates independent evolution of curved HSB in two or more lineages, but the number of instances of parallelism of this configuration is obscured by uncertainty in the relationships among these taxa and by a lack of data for some important basal taxa. A second evolutionary pathway leads from transverse HSB via compound HSB to vertical HSB. Compound HSB were detected in Hyrachyidae, Deperetellidae, and the early rhinocerotid Uintaceras. Vertical HSB configuration characterizes the molar dentition of other Rhinocerotidae, Hyracodontidae, Indricotheriidae, and Amynodontidae. Often, the incisors of rhinocerotids retain traces of compound HSB. Thus the HSB configuration reflects phylogenetic relationships to some degree. The selective value of the modified HSB configurations is interpreted functionally as a mechanism to reduce abrasion during mastication, assuming that the perpendicular intersection of prisms with the actual grinding surfaces resists wear better than prisms running parallel to the occlusal surface.

Original languageEnglish (US)
Pages (from-to)11-32
Number of pages22
JournalActa Palaeontologica Polonica
Volume56
Issue number1
DOIs
StatePublished - Mar 1 2011

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enamel
tooth
mammal
dentition
abrasion
grinding
fossil
phylogenetics
family

All Science Journal Classification (ASJC) codes

  • Palaeontology

Cite this

Koenigswald, Wighart Von ; Holbrook, Luke ; Rose, Kenneth D. / Diversity and evolution of hunter-schreger band configuration in tooth enamel of perissodactyl mammals. In: Acta Palaeontologica Polonica. 2011 ; Vol. 56, No. 1. pp. 11-32.
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Diversity and evolution of hunter-schreger band configuration in tooth enamel of perissodactyl mammals. / Koenigswald, Wighart Von; Holbrook, Luke; Rose, Kenneth D.

In: Acta Palaeontologica Polonica, Vol. 56, No. 1, 01.03.2011, p. 11-32.

Research output: Contribution to journalArticle

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