Soft-tissue evidence for homeothermy and crypsis in a Jurassic ichthyosaur

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Soft-tissue evidence for homeothermy and crypsis in a Jurassic ichthyosaur. / Lindgren, Johan; Sjövall, Peter; Thiel, Volker; Zheng, Wenxia; Ito, Shosuke; Wakamatsu, Kazumasa; Hauff, Rolf; Kear, Benjamin P.; Engdahl, Anders; Alwmark, Carl; Eriksson, Mats E.; Jarenmark, Martin; Sachs, Sven; Ahlberg, Per E.; Marone, Federica; Kuriyama, Takeo; Gustafsson, Ola; Malmberg, Per; Thomen, Aurélien; Rodríguez-Meizoso, Irene; Uvdal, Per; Ojika, Makoto; Schweitzer, Mary H.

In: Nature, Vol. 564, No. 7736, 2018, p. 359-365.

Research output: Contribution to journalArticle

Harvard

Lindgren, J, Sjövall, P, Thiel, V, Zheng, W, Ito, S, Wakamatsu, K, Hauff, R, Kear, BP, Engdahl, A, Alwmark, C, Eriksson, ME, Jarenmark, M, Sachs, S, Ahlberg, PE, Marone, F, Kuriyama, T, Gustafsson, O, Malmberg, P, Thomen, A, Rodríguez-Meizoso, I, Uvdal, P, Ojika, M & Schweitzer, MH 2018, 'Soft-tissue evidence for homeothermy and crypsis in a Jurassic ichthyosaur', Nature, vol. 564, no. 7736, pp. 359-365. https://doi.org/10.1038/s41586-018-0775-x

APA

CBE

Lindgren J, Sjövall P, Thiel V, Zheng W, Ito S, Wakamatsu K, Hauff R, Kear BP, Engdahl A, Alwmark C, Eriksson ME, Jarenmark M, Sachs S, Ahlberg PE, Marone F, Kuriyama T, Gustafsson O, Malmberg P, Thomen A, Rodríguez-Meizoso I, Uvdal P, Ojika M, Schweitzer MH. 2018. Soft-tissue evidence for homeothermy and crypsis in a Jurassic ichthyosaur. Nature. 564(7736):359-365. https://doi.org/10.1038/s41586-018-0775-x

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Author

Lindgren, Johan ; Sjövall, Peter ; Thiel, Volker ; Zheng, Wenxia ; Ito, Shosuke ; Wakamatsu, Kazumasa ; Hauff, Rolf ; Kear, Benjamin P. ; Engdahl, Anders ; Alwmark, Carl ; Eriksson, Mats E. ; Jarenmark, Martin ; Sachs, Sven ; Ahlberg, Per E. ; Marone, Federica ; Kuriyama, Takeo ; Gustafsson, Ola ; Malmberg, Per ; Thomen, Aurélien ; Rodríguez-Meizoso, Irene ; Uvdal, Per ; Ojika, Makoto ; Schweitzer, Mary H. / Soft-tissue evidence for homeothermy and crypsis in a Jurassic ichthyosaur. In: Nature. 2018 ; Vol. 564, No. 7736. pp. 359-365.

RIS

TY - JOUR

T1 - Soft-tissue evidence for homeothermy and crypsis in a Jurassic ichthyosaur

AU - Lindgren, Johan

AU - Sjövall, Peter

AU - Thiel, Volker

AU - Zheng, Wenxia

AU - Ito, Shosuke

AU - Wakamatsu, Kazumasa

AU - Hauff, Rolf

AU - Kear, Benjamin P.

AU - Engdahl, Anders

AU - Alwmark, Carl

AU - Eriksson, Mats E.

AU - Jarenmark, Martin

AU - Sachs, Sven

AU - Ahlberg, Per E.

AU - Marone, Federica

AU - Kuriyama, Takeo

AU - Gustafsson, Ola

AU - Malmberg, Per

AU - Thomen, Aurélien

AU - Rodríguez-Meizoso, Irene

AU - Uvdal, Per

AU - Ojika, Makoto

AU - Schweitzer, Mary H.

PY - 2018

Y1 - 2018

N2 - Ichthyosaurs are extinct marine reptiles that display a notable external similarity to modern toothed whales. Here we show that this resemblance is more than skin deep. We apply a multidisciplinary experimental approach to characterize the cellular and molecular composition of integumental tissues in an exceptionally preserved specimen of the Early Jurassic ichthyosaur Stenopterygius. Our analyses recovered still-flexible remnants of the original scaleless skin, which comprises morphologically distinct epidermal and dermal layers. These are underlain by insulating blubber that would have augmented streamlining, buoyancy and homeothermy. Additionally, we identify endogenous proteinaceous and lipid constituents, together with keratinocytes and branched melanophores that contain eumelanin pigment. Distributional variation of melanophores across the body suggests countershading, possibly enhanced by physiological adjustments of colour to enable photoprotection, concealment and/or thermoregulation. Convergence of ichthyosaurs with extant marine amniotes thus extends to the ultrastructural and molecular levels, reflecting the omnipresent constraints of their shared adaptation to pelagic life.

AB - Ichthyosaurs are extinct marine reptiles that display a notable external similarity to modern toothed whales. Here we show that this resemblance is more than skin deep. We apply a multidisciplinary experimental approach to characterize the cellular and molecular composition of integumental tissues in an exceptionally preserved specimen of the Early Jurassic ichthyosaur Stenopterygius. Our analyses recovered still-flexible remnants of the original scaleless skin, which comprises morphologically distinct epidermal and dermal layers. These are underlain by insulating blubber that would have augmented streamlining, buoyancy and homeothermy. Additionally, we identify endogenous proteinaceous and lipid constituents, together with keratinocytes and branched melanophores that contain eumelanin pigment. Distributional variation of melanophores across the body suggests countershading, possibly enhanced by physiological adjustments of colour to enable photoprotection, concealment and/or thermoregulation. Convergence of ichthyosaurs with extant marine amniotes thus extends to the ultrastructural and molecular levels, reflecting the omnipresent constraints of their shared adaptation to pelagic life.

U2 - 10.1038/s41586-018-0775-x

DO - 10.1038/s41586-018-0775-x

M3 - Article

VL - 564

SP - 359

EP - 365

JO - Nature

T2 - Nature

JF - Nature

SN - 0028-0836

IS - 7736

ER -