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

Lindgren, Johan (author)
Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science,Lund University, Sweden
Sjövall, Peter, 1961 (author)
RISE,Kemi och material
Thiel, V. (author)
Georg-August-Universität Göttingen,University of Göttingen,Univ Gottingen, Geosci Ctr, Geobiol, Gottingen, Germany,University of Göttingen, Germany
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Zheng, W. X. (author)
North Carolina State University,North Carolina State Univ, Dept Biol Sci, Raleigh, NC 27695 USA,North Carolina State University, USA
Ito, S. (author)
Fujita Health University,Fujita Hlth Univ, Sch Hlth Sci, Dept Chem, Toyoake, Aichi, Japan,Fujita Health University School of Health Sciences, Japan
Wakamatsu, K. (author)
Fujita Health University,Fujita Hlth Univ, Sch Hlth Sci, Dept Chem, Toyoake, Aichi, Japan,Fujita Health University School of Health Sciences, Japan
Hauff, R. (author)
Urweltmuseum Hauff, Holzmaden, Germany
Kear, Benjamin P., 1975- (author)
Uppsala University,Uppsala universitet,Evolutionsmuseet,Uppsala University, Sweden
Engdahl, Anders (author)
Lund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory,Lund University, Sweden
Alwmark, Carl (author)
Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science,Lund University, Sweden
Eriksson, Mats E. (author)
Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science,Lund University, Sweden
Jarenmark, Martin (author)
Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science,Lund University, Sweden
Sachs, S. (author)
Nat Kunde Museum Bielefeld, Abt Geowissensch, Bielefeld, Germany,Natural History Museum, Bielefeld,Naturkunde-Museum Bielefeld, Germany,Lund University, Sweden
Ahlberg, Per, 1963- (author)
Uppsala University,Uppsala universitet,Evolution och utvecklingsbiologi,Science for Life Laboratory, SciLifeLab,Uppsala University, Sweden
Marone, F. (author)
Paul Scherrer Institut,Paul Scherrer Inst, Swiss Light Source, Villigen, Switzerland,Paul Scherrer Institute, Switzerland
Kuriyama, Takeo (author)
University of Hyogo, Kobe,Univ Hyogo, Inst Nat & Environm Sci, Kobe, Hyogo, Japan;Wildlife Management Res Ctr, Tanba, Hyogo, Japan,University of Hyogo, Japan; Wildlife Management Research Center, Japan
Gustafsson, Ola (author)
Lund University,Lunds universitet,Syngruppen,Forskargrupper vid Lunds universitet,Lund Vision Group,Lund University Research Groups
Malmberg, Per, 1974 (author)
Chalmers University of Technology,Chalmers University of Technology, Sweden
Thomen, Aurélien (author)
Gothenburg University,Göteborgs universitet,Institutionen för kemi och molekylärbiologi,Department of Chemistry and Molecular Biology,University of Gothenburg,Univ Gothenburg, Dept Chem & Mol Biol, Gothenburg, Sweden,University of Gothenburg, Sweden
Rodríguez-Meizoso, Irene (author)
Lund University,Lunds universitet,Centrum för analys och syntes,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Centre for Analysis and Synthesis,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Lund University, Sweden
Uvdal, Per (author)
Lund University,Lunds universitet,Kemisk fysik,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Chemical Physics,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH,Lund University, Sweden
Ojika, M. (author)
Nagoya University,Nagoya Univ, Grad Sch Bioagr Sci, Dept Appl Biosci, Nagoya, Aichi, Japan,Nagoya University, Japan
Schweitzer, Mary H. (author)
Lund University,Lunds universitet,Berggrundsgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Lithosphere and Biosphere Science,Department of Geology,Faculty of Science,Lund University, Sweden; North Carolina State University, USA; North Carolina Museum of Natural Sciences, USA,North Carolina State University
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 (creator_code:org_t)
2018-12-05
2018
English.
In: Nature. - : Springer Science and Business Media LLC. - 0028-0836 .- 1476-4687. ; 564:7736, s. 359-
  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • 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.

Subject headings

NATURVETENSKAP  -- Biologi -- Zoologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Zoology (hsv//eng)
NATURVETENSKAP  -- Biologi -- Evolutionsbiologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Evolutionary Biology (hsv//eng)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geology (hsv//eng)

Keyword

collagen
reptiles
fibers
lipids

Publication and Content Type

ref (subject category)
art (subject category)

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