10.6084/m9.figshare.5102947.v1
Robert J. Asher
Robert J.
Asher
Gregg F. Gunnell
Gregg
F. Gunnell
Erik R. Seiffert
Erik
R. Seiffert
David Pattinson
David
Pattinson
Rodolphe Tabuce
Rodolphe
Tabuce
Lionel Hautier
Lionel
Hautier
Hesham M. Sallam
Hesham
M. Sallam
Dental eruption and growth in Hyracoidea (Mammalia, Afrotheria)
Taylor & Francis Group
2017
cheek teeth
SUPPLEMENTAL
gestation time
mammals show correlations
hyracoid
antemolar
m 2.
DOI
Heterohyrax brucei show
life history parameter
DATA
eruption patterns
2017. Dental eruption
2017-06-12 19:25:42
Dataset
https://tandf.figshare.com/articles/dataset/Dental_eruption_and_growth_in_Hyracoidea_Mammalia_Afrotheria_/5102947
<p>We investigated dental homologies, development, and growth in living and fossil hyracoids and tested if hyracoids and other mammals show correlations between eruption patterns, gestation time, and age at maturity. Unlike living species, fossil hyracoids simultaneously possess replaced P1 and canine teeth. Fossil species also have shorter crowns, an I3/i3, I2, and a hypoconulid on m3. Prenatal specimens of the living <i>Procavia capensis</i> and <i>Heterohyrax brucei</i> show up to three tooth buds posterior to dI1 and anterior to the seven upper cheek teeth that consistently erupt; erupted teeth include an anterior premolar but not a canine. Most lower cheek teeth finish eruption during growth in hyracoids, not after growth as in most other afrotherians. All hyracoids show the m1 at (lower) or near (upper) the beginning of eruption of permanent teeth; M3/m3 is the last permanent tooth to erupt. The living <i>P. capensis</i> erupts most lower antemolar loci before m2. In contrast, fossil hyraxes erupt lower antemolars after m2. Although the early eruption of antemolars correlates with increased gestation time and age at maturity in primates and <i>Tupaia</i> (i.e., ‘Schultz's rule’), and although modern hyraxes resemble some anthropoid primates in exhibiting long gestation and eruption of antemolars at or before molars, eruption patterns do not significantly covary with either life history parameter among afrotherians sampled so far. However, we do observe a shift in eruption timing and crown height in <i>Procavia</i> relative to fossil hyracoids, mirroring observations recently made for other ungulate-grade mammals.</p> <p>SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP </p> <p>Citation for this article: Asher, R. J., G. F. Gunnell, E. R. Seiffert, D. Pattinson, R. Tabuce, L. Hautier, and H. M. Sallam. 2017. Dental eruption and growth in Hyracoidea (Mammalia, Afrotheria). Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2017.1317638.</p>