[dinosaur] Tapinocephalid therapsid herbivorous dentition (free pdf)

Ben Creisler
[email protected]

A new paper in open access:

Free pdf:

Megan. R. Whitney & Christian A. Sidor (2019)
Histological and developmental insights into the herbivorous dentition of
tapinocephalid therapsids.
PLoS ONE 14(10): e0223860.
doi: https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1371_journal.pone.0223860&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=I-pXVZOfcI4omF22IgKxTRnP59fV9Mt_kkH1YUixbeY&s=g6vA5nN4NRx0vsWFlNzdhizC-3FRABU4CoFzdmQjmiQ&e= 
https://urldefense.proofpoint.com/v2/url?u=https-3A__doi.org_10.1371_journal.pone.0223860&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=I-pXVZOfcI4omF22IgKxTRnP59fV9Mt_kkH1YUixbeY&s=g6vA5nN4NRx0vsWFlNzdhizC-3FRABU4CoFzdmQjmiQ&e= 

Free pdf:
https://urldefense.proofpoint.com/v2/url?u=https-3A__journals.plos.org_plosone_article_file-3Fid-3D10.1371_journal.pone.0223860-26type-3Dprintable&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=I-pXVZOfcI4omF22IgKxTRnP59fV9Mt_kkH1YUixbeY&s=ooPiBLx92ba9jcKsg-_UkKnsl96sn-G0j5oggSYAw7g&e= 


Tapinocephalids were one of the earliest therapsid clades to evolve
herbivory. In acquiring derived tooth-to-tooth occlusion by means of an
exaggerated heel and talon crown morphology, members of this family have
long been considered herbivorous, yet little work has been done to describe
their dentition. Given the early occurrence of this clade and their
acquisition of a dentition with several derived features, tapinocephalids
serve as an important clade in understanding adaptations to herbivory as
well as macroevolutionary patterns of dental trait acquisition. Here we
describe the histology of tapinocephalid jaws and incisors to assess
adaptations to herbivory. Our results yield new dental characters for
tapinocephalids including a peculiar enamel structure and reduced enamel
deposition on the occlusal surface. These traits are convergent with other
specialized herbivorous dentitions like those found in ornithischian
dinosaurs and ungulates. Furthermore, these results demonstrate that while
acquiring some specializations, tapinocephalids also retained plesiomorphic
traits like alternate, continuous replacement. We interpret these findings
as an example of how different combinations of traits can facilitate a
derived and specialized dentition and then discuss their implications in
the acquisition of a mammal-like dentition.

<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com_email-2Dsignature-3Futm-5Fmedium-3Demail-26utm-5Fsource-3Dlink-26utm-5Fcampaign-3Dsig-2Demail-26utm-5Fcontent-3Dwebmail&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=I-pXVZOfcI4omF22IgKxTRnP59fV9Mt_kkH1YUixbeY&s=SmLbvYQstJSnqW3ioCOfjwl7yNhgab1bOO9h6xBET5U&e= >
Virus-free.
www.avg.com
<https://urldefense.proofpoint.com/v2/url?u=http-3A__www.avg.com_email-2Dsignature-3Futm-5Fmedium-3Demail-26utm-5Fsource-3Dlink-26utm-5Fcampaign-3Dsig-2Demail-26utm-5Fcontent-3Dwebmail&d=DwIBaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=I-pXVZOfcI4omF22IgKxTRnP59fV9Mt_kkH1YUixbeY&s=SmLbvYQstJSnqW3ioCOfjwl7yNhgab1bOO9h6xBET5U&e= >
<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>