Abstract：
:Continuous tooth replacement is common for tetrapods, but some groups of acrodont lepidosaurs have lost the ability to replace their dentition (monophyodonty). Acrodonty, where the tooth attaches to the apex of the jawbone, is an unusual form of tooth attachment that has been associated with the highly autapomorphic condition of monophyodonty. Beyond Lepidosauria, very little is known about the relationship between acrodonty and monophyodonty in other amniotes. We test for this association with a detailed study of the dentition of Opisthodontosaurus, an unusual Early Permian captorhinid eureptile with acrodont dentition. We provide clear evidence, both histological and morphological, that there were regular tooth replacement events in the lower jaw of Opisthodontosaurus, similar to its captorhinid relatives. Thus, our study of the oldest known amniote with an acrodont dentition shows that acrodonty does not inhibit tooth replacement, and that many of the characteristics assigned to lepidosaurian acrodonty are actually highly derived features of lepidosaurs that have resulted secondarily from a lack of tooth replacement. In the context of reptilian dental evolution, we propose the retention of the simple definition of acrodonty, which only pertains to the relative position of the tooth at the apex of the jaw, where the jaw possesses equal lingual and labial walls. This definition of implantation therefore focuses solely on the spatial relationship between the tooth and the jawbone, and separates this relationship from tooth development and replacement.
journal_name
J Anatjournal_title
Journal of anatomyauthors
Haridy Y,LeBlanc ARH,Reisz RRdoi
10.1111/joa.12754subject
Has Abstractpub_date
2018-03-01 00:00:00pages
371-382issue
3eissn
0021-8782issn
1469-7580journal_volume
232pub_type
杂志文章abstract：:A new type of magnetic resonance imaging analysis, based on fusion of three-dimensional reconstructions of time-to-peak parametric maps and high-resolution T1-weighted images, is proposed in order to evaluate the perfusion of selected volumes of interest. Because in recent years a wealth of data have suggested the cru...
journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/j.1469-7580.2006.00659.x
更新日期：2007-01-01 00:00:00
abstract：:This study was carried out on 208 Nigerian bony palates in dried skulls and on 30 palates obtained from Nigerian cadavers. Out of 208 dried skulls examined, there was a unilateral spine in 21.1% of cases, a bilateral spine in 36.5% and a bony canal in 5.7%. Of the dissected palates 30% revealed the presence of an osse...
journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1988-02-01 00:00:00
abstract：:The three kinds of keratinized epithelium evident on gross examination of the soft palate of Wistar albino rats were studied by scanning and transmission electron microscopy. Scanning indicated a central area where the epithelium showed numerous fine folds and papillae, more lateral areas which were smooth, and most l...
journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1976-09-01 00:00:00
abstract：:We investigated the occurrence and anatomy of the vomeronasal system (VNS) in tadpoles of 13 different anuran species. All of the species possessed a morphologically fully developed VNS with a highly conserved anatomical organisation. We found that a bean-shaped vomeronasal organ (VNO) developed early in the tadpoles,...
journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/j.1469-7580.2012.01543.x
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journal_title：Journal of anatomy
pub_type： 杂志文章
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abstract：:This study describes the degenerative changes of the axon terminals making synaptic contacts with the neurons in the submucous ganglia of guinea pig small and large intestines following left or right cervical vagotomy. There were no noticeable ultrastructural changes 1 d after the operation. Beginning at the 3rd posto...
journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1995-12-01 00:00:00
abstract：:The formation of a placenta is critical for successful mammalian pregnancy and requires remodelling of the uterine epithelium. In eutherian mammals, remodelling involves specific morphological changes that often correlate with the mode of embryonic attachment. Given the differences between marsupial and eutherian plac...
journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/joa.12610
更新日期：2017-07-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/joa.12765
更新日期：2018-02-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1988-10-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1984-12-01 00:00:00
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pub_type： 杂志文章
doi：10.1111/joa.13207
更新日期：2020-09-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/joa.12796
更新日期：2018-06-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/j.1469-7580.2005.00455.x
更新日期：2005-10-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/j.1469-7580.2006.00523.x
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1984-09-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/joa.12208
更新日期：2014-09-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1990-06-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1986-04-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/joa.12429
更新日期：2016-05-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1046/j.1469-7580.2002.00119.x
更新日期：2002-12-01 00:00:00
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journal_title：Journal of anatomy
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1111/j.1469-7580.2008.00853.x
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journal_title：Journal of anatomy
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doi：
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journal_title：Journal of anatomy
pub_type： 杂志文章
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1995-02-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：10.1046/j.1469-7580.1998.19220293.x
更新日期：1998-02-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1981-06-01 00:00:00
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1992-10-01 00:00:00
abstract：:Mammalian pregnancy involves remodelling of the uterine epithelium to enable placentation. In marsupials, such remodelling has probably played a key role in the transition from ancestral invasive placentation to non-invasive placentation. Identifying uterine alterations that are unique to marsupials with non-invasive ...
journal_title：Journal of anatomy
pub_type： 杂志文章
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journal_title：Journal of anatomy
pub_type： 杂志文章
doi：
更新日期：1989-04-01 00:00:00
