Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11321848 | PMC |
| http://dx.doi.org/10.1098/rspb.2024.1154 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Prolonged or perpetual growth of replacement teeth in the rock hyrax.
Anat Rec (Hoboken)
December 2024
Department of Anthropology, University of Florida, Gainesville, Florida, USA.
Tusks are ever-growing teeth present in mammals of the clade Paenungulata. Unlike the perpetually growing incisors of rodents, tusks are not used in mastication, and in at least some paenungulatans, the tusk is composed of dentin alone in adults. Few studies have provided tissue-level information on tusks of adult paenungulatans with embedding techniques that identify epithelial and other soft tissues.
View Article and Find Full Text PDFThe tusk of the male narwhal is a prolonged canine tooth, reaching a size of up to 3 m in length. The tusk erupts through the young narwhal's upper left lip and, over time, develops into an elongated structure composed of dentine growth layers with an outer coating of cementum. In this study, we utilized bomb radiocarbon (C) to estimate the ages of three narwhal tusks, which allowed us to validate the assumption that one growth layer is deposited annually in narwhal tusks.
View Article and Find Full Text PDFA new fossil dolphin with tusk-like teeth from New Zealand and an analysis of procumbent teeth in fossil cetaceans.
J R Soc N Z
November 2023
Faculty of Dentistry, Sir John Walsh Research Institute, University of Otago, Dunedin, New Zealand.
Studies involving anatomical description and taxonomy of fossil odontocetes offer insights into their evolutionary history and diversity. This study analyses tusk-like teeth in odontocetes including the description of a new species, , from the Waitaki valley, North Otago, New Zealand. Dental features of , a gracile, longirostrine odontocete with procumbent tusk-like anterior teeth and slightly denticulate cheek teeth, are described in detail.
View Article and Find Full Text PDFHow teeth, tusks and horny pads evolved together in sea cows.
Proc Biol Sci
August 2024
Department of Paleobiology, National Museum of Natural History, Smithsonian Institution , Washington, DC 20013-7012, USA.
From sabers to spikes: A newfangled reconstruction of the ancient, giant, sexually dimorphic Pacific salmon, †Oncorhynchus rastrosus (SALMONINAE: SALMONINI).
PLoS One
April 2024
Museum of Natural and Cultural History and Department of Earth Sciences, University of Oregon, Eugene, Oregon, United States of America.
Article Synopsis
- The †Oncorhynchus rastrosus, the largest salmonid from the Miocene and Pliocene eras, was initially thought to have saber-like teeth but recent CT imaging reveals they actually protruded laterally like tusks.
- Research shows sexual dimorphism in males and females, with distinct differences in bone structures and features, although premaxilla shapes are similar in both sexes.
- The species has been renamed from "Sabertoothed Salmon" to "Spike-Toothed Salmon," reflecting a better understanding of its unique teeth, which likely served multiple functions such as defense and nest building.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!