Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal
Pinnipeds generally swallow prey whole, and most have simple, homodont, nonoccluding cheek teeth. We investigated whether cheek teeth in seals are more variable and weakly integrated than in terrestrial Carnivora. We measured mandibular length and crown length of mandibular postcanines (PCs) in ring...
Published in: | Journal of Mammalogy |
---|---|
Main Authors: | , , , , , |
Format: | Text |
Language: | English |
Published: |
Oxford University Press
2007
|
Subjects: | |
Online Access: | http://jmammal.oxfordjournals.org/cgi/content/short/88/5/1325 https://doi.org/10.1644/06-MAMM-A-243R.1 |
id |
fthighwire:oai:open-archive.highwire.org:jmammal:88/5/1325 |
---|---|
record_format |
openpolar |
spelling |
fthighwire:oai:open-archive.highwire.org:jmammal:88/5/1325 2023-05-15T15:05:34+02:00 Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal Miller, Edward H. Sung, Ha-Cheol Moulton, Valerie D. Miller, Gary W. Finley, J. Kerry Stenson, Garry B. 2007-10-18 00:00:00.0 text/html http://jmammal.oxfordjournals.org/cgi/content/short/88/5/1325 https://doi.org/10.1644/06-MAMM-A-243R.1 en eng Oxford University Press http://jmammal.oxfordjournals.org/cgi/content/short/88/5/1325 http://dx.doi.org/10.1644/06-MAMM-A-243R.1 Copyright (C) 2007, Oxford University Press Feature Articles TEXT 2007 fthighwire https://doi.org/10.1644/06-MAMM-A-243R.1 2016-11-16T18:31:44Z Pinnipeds generally swallow prey whole, and most have simple, homodont, nonoccluding cheek teeth. We investigated whether cheek teeth in seals are more variable and weakly integrated than in terrestrial Carnivora. We measured mandibular length and crown length of mandibular postcanines (PCs) in ringed seals ( Pusa hispida; n = 912) from the Canadian Arctic, and harp seals ( Pagophilus groenlandicus; n = 636) from Newfoundland and Labrador. PC size was uncorrected or only weakly correlated with adult mandibular length. PC length and mandibular length were strongly bilaterally symmetrical ( r ≥ 0.8 between left and right sides). PC size was moderately variable (coefficients of variation [ CV s] ∼ 7–10%), and CV varied with position in the toothrow. Adjacent PCs were correlated more strongly in size (to r > 0.8) than PCs more distant from one another. In summary, PC size in ringed and harp seals was slightly more variable than cheek teeth in complex dentitions of fissipeds, and the 2 seals were similar to fissipeds in strong bilateral symmetry in mandibular and PC size, patterned variation along the toothrow, and correlated size between adjacent PCs. Text Arctic Newfoundland Pagophilus groenlandicus Pusa hispida HighWire Press (Stanford University) Arctic Newfoundland Journal of Mammalogy 88 5 1325 1334 |
institution |
Open Polar |
collection |
HighWire Press (Stanford University) |
op_collection_id |
fthighwire |
language |
English |
topic |
Feature Articles |
spellingShingle |
Feature Articles Miller, Edward H. Sung, Ha-Cheol Moulton, Valerie D. Miller, Gary W. Finley, J. Kerry Stenson, Garry B. Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal |
topic_facet |
Feature Articles |
description |
Pinnipeds generally swallow prey whole, and most have simple, homodont, nonoccluding cheek teeth. We investigated whether cheek teeth in seals are more variable and weakly integrated than in terrestrial Carnivora. We measured mandibular length and crown length of mandibular postcanines (PCs) in ringed seals ( Pusa hispida; n = 912) from the Canadian Arctic, and harp seals ( Pagophilus groenlandicus; n = 636) from Newfoundland and Labrador. PC size was uncorrected or only weakly correlated with adult mandibular length. PC length and mandibular length were strongly bilaterally symmetrical ( r ≥ 0.8 between left and right sides). PC size was moderately variable (coefficients of variation [ CV s] ∼ 7–10%), and CV varied with position in the toothrow. Adjacent PCs were correlated more strongly in size (to r > 0.8) than PCs more distant from one another. In summary, PC size in ringed and harp seals was slightly more variable than cheek teeth in complex dentitions of fissipeds, and the 2 seals were similar to fissipeds in strong bilateral symmetry in mandibular and PC size, patterned variation along the toothrow, and correlated size between adjacent PCs. |
format |
Text |
author |
Miller, Edward H. Sung, Ha-Cheol Moulton, Valerie D. Miller, Gary W. Finley, J. Kerry Stenson, Garry B. |
author_facet |
Miller, Edward H. Sung, Ha-Cheol Moulton, Valerie D. Miller, Gary W. Finley, J. Kerry Stenson, Garry B. |
author_sort |
Miller, Edward H. |
title |
Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal |
title_short |
Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal |
title_full |
Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal |
title_fullStr |
Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal |
title_full_unstemmed |
Variation and Integration of the Simple Mandibular Postcanine Dentition in Two Species of Phocid Seal |
title_sort |
variation and integration of the simple mandibular postcanine dentition in two species of phocid seal |
publisher |
Oxford University Press |
publishDate |
2007 |
url |
http://jmammal.oxfordjournals.org/cgi/content/short/88/5/1325 https://doi.org/10.1644/06-MAMM-A-243R.1 |
geographic |
Arctic Newfoundland |
geographic_facet |
Arctic Newfoundland |
genre |
Arctic Newfoundland Pagophilus groenlandicus Pusa hispida |
genre_facet |
Arctic Newfoundland Pagophilus groenlandicus Pusa hispida |
op_relation |
http://jmammal.oxfordjournals.org/cgi/content/short/88/5/1325 http://dx.doi.org/10.1644/06-MAMM-A-243R.1 |
op_rights |
Copyright (C) 2007, Oxford University Press |
op_doi |
https://doi.org/10.1644/06-MAMM-A-243R.1 |
container_title |
Journal of Mammalogy |
container_volume |
88 |
container_issue |
5 |
container_start_page |
1325 |
op_container_end_page |
1334 |
_version_ |
1766337237722595328 |