Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris
Abstract Functionally relevant features and parameters of the outer, middle, and inner ear were studied morphologically and morphometrically in two species of voles, smaller Microtus arvalis and larger Arvicola terrestris . The findings in these fossorial (i.e., burrowing) rodents with components of...
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crwiley:10.1002/jmor.10277 2024-06-02T08:10:26+00:00 Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris Lange, Simone Stalleicken, Julia Burda, Hynek 2004 http://dx.doi.org/10.1002/jmor.10277 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.10277 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.10277 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Morphology volume 262, issue 3, page 770-779 ISSN 0362-2525 1097-4687 journal-article 2004 crwiley https://doi.org/10.1002/jmor.10277 2024-05-03T11:18:13Z Abstract Functionally relevant features and parameters of the outer, middle, and inner ear were studied morphologically and morphometrically in two species of voles, smaller Microtus arvalis and larger Arvicola terrestris . The findings in these fossorial (i.e., burrowing) rodents with components of surface activity were compared with respective findings reported for taxonomically related muroid rodents representing the same size classes but different eco‐morphotypes: obligate subterranean rodents ( Ellobius talpinus and Spalax ehrenbergi superspecies) and generalized rodents ( Mus domesticus and Rattus norvegicus ). The ear in voles was characterized by traits reported for subterranean rodents. The eardrum was round, without a distinct pars flaccida, and had an area of 5.4 mm 2 in M. arvalis and 9 mm 2 in A. terrestris . The middle ear exhibited reduced goniale, enlarged incus nearly parallel to the manubrium of the malleus. The malleus‐incus lever ratio amounted to 2.1 ( M. arvalis ) and 2.0 ( A. terrestris ). The malleus‐incus complex weighed about 0.8 mg in both vole species. The stapedial footplate had an area of 0.3 mm 2 in M. arvalis and 0.4 mm 2 in A. terrestris . The cochlea had 2.3 coils in both vole species; the basilar membrane was 8.5 mm and 10.5 mm long in M. arvalis and A. terrestris , respectively. There were on average 1,030 ( M. arvalis ) and 1,220 ( A. terrestris ) inner hair cells, and 3,760 ( M. arvalis ) and 4,250 ( A. terrestris ) outer hair cells in the organ of Corti. In quantitative terms, all these (as well as some further) traits and parameters were intermediate (related to body size) between those reported for generalized rodents on the one hand and subterranean ones on the other. The sound transmission system of the ear seems to be best tuned to frequencies of about 8–16 kHz with a high‐frequency cut‐off at about 50–60 kHz. The ear of A. terrestris seems to be tuned to somewhat lower frequencies than that in M. arvalis . In this aspect as well as regarding hearing sensitivity (as ... Article in Journal/Newspaper Microtus arvalis Wiley Online Library Lever ENVELOPE(-63.608,-63.608,-65.506,-65.506) Journal of Morphology 262 3 770 779 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Functionally relevant features and parameters of the outer, middle, and inner ear were studied morphologically and morphometrically in two species of voles, smaller Microtus arvalis and larger Arvicola terrestris . The findings in these fossorial (i.e., burrowing) rodents with components of surface activity were compared with respective findings reported for taxonomically related muroid rodents representing the same size classes but different eco‐morphotypes: obligate subterranean rodents ( Ellobius talpinus and Spalax ehrenbergi superspecies) and generalized rodents ( Mus domesticus and Rattus norvegicus ). The ear in voles was characterized by traits reported for subterranean rodents. The eardrum was round, without a distinct pars flaccida, and had an area of 5.4 mm 2 in M. arvalis and 9 mm 2 in A. terrestris . The middle ear exhibited reduced goniale, enlarged incus nearly parallel to the manubrium of the malleus. The malleus‐incus lever ratio amounted to 2.1 ( M. arvalis ) and 2.0 ( A. terrestris ). The malleus‐incus complex weighed about 0.8 mg in both vole species. The stapedial footplate had an area of 0.3 mm 2 in M. arvalis and 0.4 mm 2 in A. terrestris . The cochlea had 2.3 coils in both vole species; the basilar membrane was 8.5 mm and 10.5 mm long in M. arvalis and A. terrestris , respectively. There were on average 1,030 ( M. arvalis ) and 1,220 ( A. terrestris ) inner hair cells, and 3,760 ( M. arvalis ) and 4,250 ( A. terrestris ) outer hair cells in the organ of Corti. In quantitative terms, all these (as well as some further) traits and parameters were intermediate (related to body size) between those reported for generalized rodents on the one hand and subterranean ones on the other. The sound transmission system of the ear seems to be best tuned to frequencies of about 8–16 kHz with a high‐frequency cut‐off at about 50–60 kHz. The ear of A. terrestris seems to be tuned to somewhat lower frequencies than that in M. arvalis . In this aspect as well as regarding hearing sensitivity (as ... |
format |
Article in Journal/Newspaper |
author |
Lange, Simone Stalleicken, Julia Burda, Hynek |
spellingShingle |
Lange, Simone Stalleicken, Julia Burda, Hynek Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris |
author_facet |
Lange, Simone Stalleicken, Julia Burda, Hynek |
author_sort |
Lange, Simone |
title |
Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris |
title_short |
Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris |
title_full |
Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris |
title_fullStr |
Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris |
title_full_unstemmed |
Functional morphology of the ear in fossorial rodents, Microtus arvalis and Arvicola terrestris |
title_sort |
functional morphology of the ear in fossorial rodents, microtus arvalis and arvicola terrestris |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1002/jmor.10277 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjmor.10277 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jmor.10277 |
long_lat |
ENVELOPE(-63.608,-63.608,-65.506,-65.506) |
geographic |
Lever |
geographic_facet |
Lever |
genre |
Microtus arvalis |
genre_facet |
Microtus arvalis |
op_source |
Journal of Morphology volume 262, issue 3, page 770-779 ISSN 0362-2525 1097-4687 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jmor.10277 |
container_title |
Journal of Morphology |
container_volume |
262 |
container_issue |
3 |
container_start_page |
770 |
op_container_end_page |
779 |
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1800756300113510400 |