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Morphology and evolution of the snake cornea

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Harvard

Da Silva, M-AO, Gade, JT, Damsgaard, C, Wang, T, Heegaard, S & Bertelsen, MF 2020, 'Morphology and evolution of the snake cornea', Journal of Morphology, bind 281, nr. 2, s. 240-249. https://doi.org/10.1002/jmor.21094

APA

Da Silva, M-A. O., Gade, J. T., Damsgaard, C., Wang, T., Heegaard, S., & Bertelsen, M. F. (2020). Morphology and evolution of the snake cornea. Journal of Morphology, 281(2), 240-249. https://doi.org/10.1002/jmor.21094

CBE

Da Silva M-AO, Gade JT, Damsgaard C, Wang T, Heegaard S, Bertelsen MF. 2020. Morphology and evolution of the snake cornea. Journal of Morphology. 281(2):240-249. https://doi.org/10.1002/jmor.21094

MLA

Vancouver

Da Silva M-AO, Gade JT, Damsgaard C, Wang T, Heegaard S, Bertelsen MF. Morphology and evolution of the snake cornea. Journal of Morphology. 2020 feb;281(2):240-249. https://doi.org/10.1002/jmor.21094

Author

Da Silva, Mari-Ann Otkjaer ; Gade, Jacob Thorup ; Damsgaard, Christian ; Wang, Tobias ; Heegaard, Steffen ; Bertelsen, Mads Frost. / Morphology and evolution of the snake cornea. I: Journal of Morphology. 2020 ; Bind 281, Nr. 2. s. 240-249.

Bibtex

@article{f39905e554664d33880a6e3a89a9ae77,
title = "Morphology and evolution of the snake cornea",
abstract = "To investigate whether the thickness of the cornea in snakes correlates with overall anatomy, habitat or daily activity pattern, we measured corneal thickness using optical coherence tomography scanning in 44 species from 14 families (214 specimens) in the collection at the Natural History Museum (Denmark). Specifically, we analyzed whether the thickness of the cornea varies among species in absolute terms and relative to morphometrics, such as body length, spectacle diameter, and spectacle thickness. Furthermore, we examined whether corneal thickness reflects adaptation to different habitats and/or daily activity patterns. The snakes were defined as arboreal (n = 8), terrestrial (n = 22), fossorial (n = 7), and aquatic (n = 7); 14 species were classified as diurnal and 30 as nocturnal. We reveal that the interspecific variation in corneal thickness is largely explained by differences in body size, but find a tendency towards thicker corneas in diurnal (313 ± 227 μm) compared to nocturnal species (205 ± 169 μm). Furthermore, arboreal snakes had the thickest corneas and fossorial snakes the thinnest. Our study shows that body length, habitat, and daily activity pattern could explain the interspecific variation in corneal morphology among snakes. This study provides a quantitative analysis of the evolution of the corneal morphology in snakes, and it presents baseline values of corneal thickness of multiple snake species. We speculate that the cornea likely plays a role in snake vision, despite the fact that results from previous studies suggest that the cornea in snakes is not relevant for vision (Sivak, Vision Research, 1977, 17, 293-298).",
keywords = "eye, OCT, ophthalmology, reptile, serpentes",
author = "{Da Silva}, {Mari-Ann Otkjaer} and Gade, {Jacob Thorup} and Christian Damsgaard and Tobias Wang and Steffen Heegaard and Bertelsen, {Mads Frost}",
note = "{\textcopyright} 2019 Wiley Periodicals, Inc.",
year = "2020",
month = feb,
doi = "10.1002/jmor.21094",
language = "English",
volume = "281",
pages = "240--249",
journal = "Journal of Morphology",
issn = "0362-2525",
publisher = "John/Wiley & Sons, Inc. John/Wiley & Sons Ltd",
number = "2",

}

RIS

TY - JOUR

T1 - Morphology and evolution of the snake cornea

AU - Da Silva, Mari-Ann Otkjaer

AU - Gade, Jacob Thorup

AU - Damsgaard, Christian

AU - Wang, Tobias

AU - Heegaard, Steffen

AU - Bertelsen, Mads Frost

N1 - © 2019 Wiley Periodicals, Inc.

PY - 2020/2

Y1 - 2020/2

N2 - To investigate whether the thickness of the cornea in snakes correlates with overall anatomy, habitat or daily activity pattern, we measured corneal thickness using optical coherence tomography scanning in 44 species from 14 families (214 specimens) in the collection at the Natural History Museum (Denmark). Specifically, we analyzed whether the thickness of the cornea varies among species in absolute terms and relative to morphometrics, such as body length, spectacle diameter, and spectacle thickness. Furthermore, we examined whether corneal thickness reflects adaptation to different habitats and/or daily activity patterns. The snakes were defined as arboreal (n = 8), terrestrial (n = 22), fossorial (n = 7), and aquatic (n = 7); 14 species were classified as diurnal and 30 as nocturnal. We reveal that the interspecific variation in corneal thickness is largely explained by differences in body size, but find a tendency towards thicker corneas in diurnal (313 ± 227 μm) compared to nocturnal species (205 ± 169 μm). Furthermore, arboreal snakes had the thickest corneas and fossorial snakes the thinnest. Our study shows that body length, habitat, and daily activity pattern could explain the interspecific variation in corneal morphology among snakes. This study provides a quantitative analysis of the evolution of the corneal morphology in snakes, and it presents baseline values of corneal thickness of multiple snake species. We speculate that the cornea likely plays a role in snake vision, despite the fact that results from previous studies suggest that the cornea in snakes is not relevant for vision (Sivak, Vision Research, 1977, 17, 293-298).

AB - To investigate whether the thickness of the cornea in snakes correlates with overall anatomy, habitat or daily activity pattern, we measured corneal thickness using optical coherence tomography scanning in 44 species from 14 families (214 specimens) in the collection at the Natural History Museum (Denmark). Specifically, we analyzed whether the thickness of the cornea varies among species in absolute terms and relative to morphometrics, such as body length, spectacle diameter, and spectacle thickness. Furthermore, we examined whether corneal thickness reflects adaptation to different habitats and/or daily activity patterns. The snakes were defined as arboreal (n = 8), terrestrial (n = 22), fossorial (n = 7), and aquatic (n = 7); 14 species were classified as diurnal and 30 as nocturnal. We reveal that the interspecific variation in corneal thickness is largely explained by differences in body size, but find a tendency towards thicker corneas in diurnal (313 ± 227 μm) compared to nocturnal species (205 ± 169 μm). Furthermore, arboreal snakes had the thickest corneas and fossorial snakes the thinnest. Our study shows that body length, habitat, and daily activity pattern could explain the interspecific variation in corneal morphology among snakes. This study provides a quantitative analysis of the evolution of the corneal morphology in snakes, and it presents baseline values of corneal thickness of multiple snake species. We speculate that the cornea likely plays a role in snake vision, despite the fact that results from previous studies suggest that the cornea in snakes is not relevant for vision (Sivak, Vision Research, 1977, 17, 293-298).

KW - eye

KW - OCT

KW - ophthalmology

KW - reptile

KW - serpentes

U2 - 10.1002/jmor.21094

DO - 10.1002/jmor.21094

M3 - Journal article

C2 - 31876020

VL - 281

SP - 240

EP - 249

JO - Journal of Morphology

JF - Journal of Morphology

SN - 0362-2525

IS - 2

ER -

ID: 58938908