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Skull shape and feeding strategy in Sphenodon and other Rhynchocephalia (Diapsida: Lepidosauria)†

  1. Marc E.H. Jones*

Article first published online: 30 MAY 2008

DOI: 10.1002/jmor.10634

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Journal of Morphology

Journal of Morphology

Volume 269, Issue 8, pages 945–966, August 2008

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Jones, M. E.H. (2008), Skull shape and feeding strategy in Sphenodon and other Rhynchocephalia (Diapsida: Lepidosauria). J. Morphol., 269: 945–966. doi: 10.1002/jmor.10634

Author Information

  1. Research Department of Cell and Developmental Biology, Anatomy Building, UCL, University College London, London WCIE 6BT, UK

*Research Department of Cell and Developmental Biology, Main Anatomy Building, UCL, University College London, Gower Street, London WCIE 6BT, UK

  1. †

    This paper is dedicated to the memory of Brian N. Ruth whose help gave me a tremendous head start in morphometrics.

Publication History

  1. Issue published online: 11 JUL 2008
  2. Article first published online: 30 MAY 2008

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LITERATURE CITED

  • Abbasi A,Wells RM,Brittain T,Braunitzer G. 1988. Primary structure of the hemoglobins from Sphenodon (Sphenodon punctatus, Tuatara, Rhynchocephalia). Evidence for the expression of alpha D-gene Biol Chem Hoppe Seyler 369: 755–764.
  • Adams LA. 1919. A memoir on the phylogeny of the jaw muscles in recent and fossil vertebrates. Ann N Y Acad Sci 28: 51–166.
    Direct Link:
  • Adriaens D. 2004. How to measure ontogeny? J Morphol 260: 274A.
  • Alibardi L,Maderson FM. 2003. Observations on the histochemistry and ultrastructure of the epidermis of the Tuatara Sphenodon punctatus (Sphenodontida, Lepidosauria, Reptilia): A contribution to the understanding of the evolutionary origin of the squamate shedding complex. J Morphol 256: 111–133.
    Direct Link:
  • Apesteguía S,Novas FE. 2003. Large Cretaceous sphenodontian from Patagonia provides insights into lepidosaur evolution in Gondwana. Nature 459: 609–612.
  • Apesteguía S. 2005. A Late Campanian sphenodontid (Reptilia. Diapsida) from northern Patagonia. C R Palevol 4: 663–669.
  • Benton MJ. 1985. Classification and phylogeny of the diapsid reptiles. Zool J Linn Soc 84: 97–164.
    Direct Link:
  • Bowman RI. 1961. Morphological differentiation and adaptation in the Galapagos finches. Univ Calif Publ Zool 58: l–302.
  • Buller WL. 1877. Notes on the tuatara lizard (Sphenodon punctatum), with a description of a supposed new species. Trans N Z Inst 9: 317–325.
  • Byerly TC. 1925. The myology of Sphenodon punctatum. Univ Iowa Stud Nat Hist 9: 1–51.
  • Caumul R,Polly PD. 2005. Phylogenetic and environmental components of morphological variation: Skull, mandible and molar shape in marmots (Marmota. Rodentia). Evolution 59: 2460–2472.
  • Carroll RL. 1985. A pleurosaur from the lower Jurassic and the taxonomic position of the Sphenodontida. Palaeontol Abt A 189: 1–28.
  • Carroll RC,Wild R. 1994. Marine members of the Sphenodontia. In: FraserNC,H-DSues, editors. In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods. Cambridge: Cambridge University Press. pp 70–83.
  • Cartland-Shaw LK,Cree A,Skeaff CM,Grimmond NM. 1998. Differences in dietary and plasma fatty acids between wild and captive populations of a rare reptile (the tuatara. Sphenodon punctatus). J Comp Physiol B 168: 569–580.
  • Chivers DJ,Hladik CM. 1984. Diet and gut morphology in primates. In: ChiversDJ,WoodBA,BilsboroughA, editors. Food Acquisition and Processing in Primates. New York: Plenum Press. pp 213–230.
  • Claude J,Pritchard PCH,Tong H,Paradis E,Auffray J-C. 2004. Ecological correlates and evolutionary divergence in the skull of turtles: A geometric morphometric assessment. Syst Biol 53: 933–948.
  • Cleuren JP,Aerts P,De Vree F. 1995. Bite and joint force analysis in Caiman crocodilus. Belg J Zool Lond 125: 79–94.
  • Cocude-Michel M. 1963. Les rhynchocéphales et les sauriens des calcaires lithographiques (Jurassique Supérieur) d'Europe occidentale. Nouv Arch Mus Hist Nat 7: 1–187.
  • Constantino P. 2007. Primate skull adaptations to fracture resistant foods. J Morphol 268: 1061–1062A.
  • Cooper WE,Vitt LJJr. 2002. Distribution, extent, and evolution of plant consumption by lizards. J Zool Lond 257: 487–517.
    Direct Link:
  • Cree A,Daugherty CH,Hay JM. 1995. Reproduction of a rare New Zealand reptile, the Tuatara Sphenodon punctatus, on rat-free and rat-inhabited islands. Conserv Biol 9: 373–383.
    Direct Link:
  • Cree A,Lyon GL,Cartland Shaw L,Tyrrel C. 1999. Stable isotope ratios as indicators of marine versus terrestrial inputs to the diets of wild and captive tuatara (Sphenodon punctatus). N Z J Zool 26: 243–253.
  • Cree A,Butler D. 2001. Tuatara Recovery Plan No. 47, 2001-2011. Te Papa Atawhai: Dept of Conservation. 37 p.
  • Crook IG. 1975. The tuatara. In: KuschelG, editor. Biogeography and Ecology in New Zealand. New Zealand: Junk. pp 331–352.
  • Daugherty CH,Cree A,Hay JM,Thompson MB. 1990. Neglected taxonomy and continuing extinctions of tuatara (Sphenodon). Nature 347: 177–179.
  • Dawbin WH. 1962. The tuatara in its natural habitat. Endeavour 81: 16–24.
  • Dawbin WH. 1982. The tuatara Sphenodon punctatus (Reptilia: Rhynchocephalia): A review. In: NewmanDG, editor. New Zealand Herpetology. New Zealand: Wildlife Service Occasional Publications 2. pp 149–181.
  • deBraga M,Rieppel O. 1997. Reptile phylogeny and the interrelationships of turtles. Zool J Linn Soc 120: 281–354.
    Direct Link:
  • Dryden I,Mardia KV. 1998. Statistical Shape Analysis. Chichester: John Wiley and Sons Ltd. 376 p.
  • Dupret V. 2004. The pleurosaurs: anatomy and phylogeny. Revue de Paléobiologue, Genève 9: 61–80.
  • Erickson GM,Lappin AK,Vliet KA. 2003. The ontogeny of bite-force performance in American alligator (Alligator mississippiensis). J Zool Lond 260: 317–327.
    Direct Link:
  • Evans AR,Sanson GD. 1998. The effect of tooth shape on the breakdown of insects. J Zool Lond 246: 391–400.
    Direct Link:
  • Evans SE. 1980. The skull of a new eosuchian reptile from the Lower Jurassic of South Wales. Zool J Linn Soc 70: 203–264.
    Direct Link:
  • Evans SE. 1981. The postcranial skeleton of the Lower Jurassic eosuchian Gephyrosaurus bridensis. Zool J Linn Soc 73: 81–116.
    Direct Link:
  • Evans SE. 1984. The classification of the Lepidosauria. Zool J Linn Soc 82: 87–100.
    Direct Link:
  • Evans SE. 1988. The early history and relationships of the Diapsida. In: BentonMJ, editor. The Phylogeny and Classification of the Tetrapods. Oxford: Oxford University Press. pp 221–253.
  • Evans SE,Sigogneau-Russell D. 1997. New sphenodontians (Diapsida: Lepidosauria: Rhynchocephalia) from the early Cretaceous of North Africa. J Vert Paleontol 17: 45–51.
  • Evans SE,Prasad GVR,Manhas BK. 2001. Rhynchocephalians (Diapsida: Lepidosauria) from the Jurassic Kota Formation of India. Zool J Linn Soc 133: 309–334.
    Direct Link:
  • Evans SE. 2003. At the feet of the dinosaurs: The early history and radiation of lizards. Biol Rev 78: 513–551.
    Direct Link:
  • Evans SE. in press. The skull of lizards and tuatara. In: GansC,GauntAS,AdlerK, editors. Biology of the Reptilia, 20, Society for the Study of Amphibians and Reptiles. (drawing of LDUCZ x804 only).
  • Farlow JO. 1975. Observation on a captive tuatara (Sphenodon punctatum). J Herpetol 9: 353–355.
  • Field A. 2006. Discovering Statistics Using SPSS for Windows: Advanced Techniques for Beginners (Introducing Statistical Methods), 2nd ed. London: SAGE Publications Ltd. p 779.
  • Foster JR. 2003. New specimens of Eilenodon (Reptilia: Sphenodontia) from the Morrison Formation (Upper Jurassic) of Colorado and Utah. BYU Geol Stud 47: 17–22.
  • Fraser NC. 1982. A new rhynchocephalian from the British Upper Trias. Palaeontol 25: 709–725.
  • Fraser NC,Walkden GM. 1983. The ecology of a Late Triassic reptile assemblage from Gloucestershire, England. Palaeogeog Palaeoclimat Palaeolecol 42: 341–365.
  • Fraser NC,Walkden GM. 1984. The postcranial skeleton of the Upper Triassic sphenodontid Planocephalosaurus robinsonae. Palaeontol 24: 575–595.
  • Fraser NC. 1986. New Triassic sphenodontids from South West England and a review of their classification. Palaeontol 29: 165–186.
  • Fraser NC. 1988. The osteology and relationships of Clevosaurus(Reptilia: Sphenodontida). Philos Trans R Soc Lond B 321: 125–178.
  • Fraser NC,Shelton CG. 1988. Studies of the tooth implantation in fossil tetrapods using high-resolution X-radiography. Geol Mag 125: 117–122.
  • Fraser NC,Benton MJ. 1989. The Triassic reptiles Brachyrhinodon and Polysphenodon and the relationships of the sphenodontids. Zool J Linn Soc 96: 413–445.
    Direct Link:
  • Fraser NC,Wu X-C. 1998. Sphenodontians from the Brushy Basin Member of the Morrison Formation in Dinosaur National Monument. In: CarpenterK,ChureDJ,KirklandJI, editors. The Upper Jurassic Morrison Formation: An Interdisciplinary Study, Modern Geology 23. pp 17–34.
  • Frazetta TH. 1968. Adaptive problems and possibilities in the temporal fenestration of tetrapod skulls. J Morphol 125: 145–158.
    Direct Link:
  • Freeman PW. 1979. Specialized insectivory: Beetle-eating and moth-eating molossid bats. J Mammal 60: 467–479.
  • Freeman PW. 1981. Correspondence of food habits and morphology in insectivorous bats. J Mammal 62: 166–173.
  • Gabriel S,Polly PD. 2004. Nonmasticatory functional complexes and their effect on the morphology of the insectivoran glenoid. J Morphol 260: 293A.
  • Gans C. 1983. Is Sphenodon punctatus a maladapted relic? In: RhodinAGJ,MiyataK, editors. Advances in Herpetology and Evolutionary Biology. Cambridge MA: Harvard University Press. pp 613–620.
  • Gans C,Gillingham JC,Clark DL. 1984. Courtship, mating and male combat in Tuatara, Sphenodon punctatus. J Herpetol 18: 194–197.
  • Gauthier JA,Estes R,de Queiroz K. 1988. A phylogenetic analysis of the Lepidosauromorpha. In: EstesR,PregillG, editors. Phylogenetic Relationships of the Lizard Families: Essays Commemorating Charles L. Camp. Stanford: Stanford University Press. pp 15–98.
  • Gillingham JC,Carmichael C,Miller T. 1995. Social behavior of the Tuatara, Sphenodon punctatus. Herpetol Monogr 9: 5–16.
  • Gilmore CW. 1909. A new rhynchocephalian reptile from the Jurassic of Wyoming, with notes on the fauna of Quarry 9. Proc US Natl Mus 37: 35–42.
  • Gorniak GC,Rosenberg HI,Gans C. 1982. Mastication in the Tuatara. Sphenodon punctatus (Reptilia: Rhynchocephalia): Structure and activity of the motor system. J Morphol 171: 321–353.
    Direct Link:
  • Grant BR. 1985. Selection on bill characters in a population of Darwin's finches: Geospiza conirostris on Isla Genovesa, Galápagos. Evolution 39: 523–532.
  • Grant PR. 1986. Ecology and Evolution of Darwin's Finches. Princeton, NJ: Princeton University Press. p 458.
  • Greaves WC. 1974. Functional implications of mammalian jaw joint positions. Forma Funct 7: 363–376.
  • Gregory WK,Adams LA. 1915. The temporal fossae of vertebrates in relation to the jaw muscles. Science 41: 763–765.
  • Günther A. 1867. Contribution to the anatomy of Hatteria (Rhynchocephalus, Owen). Phil Trans R Soc Lond 157: 1–34.
  • Hall J. 2005. Using variation in modern populations to examine ancient ones: a morphometric approach to species affinity. J Vert Palaeontol 25S: 67.
  • Hay JM,Daugherty CH,Cree A,Maxson LR. 2003. Low genetic divergence obscures phylogeny among populations of Sphenodon, remnant of an ancient reptile lineage. Mol Phylogenet Evol 29: 1–19.
  • Hay JM,Sarre SD,Daugherty CH. 2004. Nuclear mitochondrial pseudogenes as molecular outgroups for phylogenetically isolated taxa: A case study in Sphenodon. Heredity 93: 468–475.
  • Heathcote J. 2004. Cranial variation in the Ornithopoda (Dinosauria): Reconciling geometric morphometrics and phylogeny. J Vert Palaeontol 24S: 69.
  • Heckert AB. 2004. Late Triassic microvertebrates from the lower Chinle Group (Otischalkian-Adamanian:Carnian) southwstern USA. N M Mus Nat Hist Sci Bull. 27: 1–170.
  • Henderson DM. 1998. Skull and tooth morphology as indicators of niche partitioning in sympatric Morrison Formation theropods. In: Perez-MorenoBP,HoltzT,SanzJL,MoratallaJ, editors. Aspects of Theropod Palaeobiology. Gaia 15: 219–226.
  • Henderson DM. 2002. The eyes have it: the sizes, shapes, and orientations of theropod orbits as indicators of skull strength and bite force. J Vert Palaeontol 22: 766–778.
  • Herrel A,Aerts P,De Vree F. 1998. Static biting in lizards with a primitive skull: functional morphology of the temporal ligaments. J Zool Lond 244: 135–143.
    Direct Link:
  • Herrel A,Aerts P,Fret J,De Vree F. 1999. Morphology of the feeding system in agamid lizards: ecological correlates. Anat Rec 254: 496–507.
    Direct Link:
  • Herrel A,De Grauw E,Lemos-Espinal JA. 2001a. Head shape and bite performance in xenosaurid lizards. J Exp Zool 290: 101–107.
    Direct Link:
  • Herrel A,Damme RV,Vanhooydonck B,Vree FD. 2001b. The implications of bite performance for diet in two species of lacertid lizards. Can J Zool 79: 62–670.
  • Herrel A,O'Reilly JC,Richmond AM. 2002. Evolution of bite performance in turtles. J Evol Biol 15: 1083–1094.
    Direct Link:
  • Herrel A,Vanhooydonck B,Van Damme R. 2004. Omnivory in lacertid lizards: adaptive evolution or constraint? J Evol Biol 17: 974–984.
    Direct Link:
  • Hill RV. 2005. Integration of morphological data sets for phylogenetic analysis of Amniota: The importance of integumentary characters and increased taxonomic sampling. Syst Biol 54: 530–547.
  • Hollenshead M. 2007. Geometric morphometric analysis of intraspecific skull variation in Egernia depressa (Squamata: Scincidae). J Morphol 268: 1085A.
  • Howes GB,Swinnerton HH. 1901. On the development of the skeleton of the Tuatara, Sphenodon punctatus; with remarks on the egg, on the hatchling, and on the hatched young. Trans Zool Soc Lon 16: 1–86.
    Direct Link:
  • Hunt N. 1998. Muscle function and the control of facial form. In: HarrisM,EdgarM,MeghjiS, editors. Clinical Oral Science. Oxford: Wright. pp 120–133.
  • Jones MEH. 2004. Exploring rhynchocephalian skull morphology with morphometrics. J Vert Palaeontol 24S: 76–77.
  • Jones MEH. 2006a. The Early Jurassic clevosaurs from China (Diapsida: Lepidosauria). In: HarrisJD,LucasS,KirklandJ, and MilnerARC, editors. The Triassic/Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin. pp 548–562.
  • Jones MEH. 2006b. Skull evolution and Functional Morphology in Sphenodon and Other Rhynchocephalia (Diapsida: Lepidosauria). University of London, London. p 567.
  • Jones MEH. 2006c. Tooth diversity and function in the Rhynchocephalia (Diapsida: Lepidosauria). In: BarrettPM,EvansSE, editors. Ninth International Symposium on Mesozoic Terrestrial Ecosystems and Biota. London: Natural History Museum. pp 55–58.
  • Jones MEH. 2007a. Cranial suture morphology of the lepidosaur Sphenodon (Diapsida: Rhynchocephalia) and implications for functional morphology. J Morphol 268: 1090–1091A.
  • Jones MEH. 2007b. Geometric morphometric analysis of variation in Sphenodon ‘sub-fossil’ material. Palaeontol Assoc Newslett 65: 95–99.
  • King G. 1996. Reptiles and herbivory. London, New York: Chapman and Hall. p 160.
  • Lappin KA,Husak JF. 2005. Weapon performance, not size, determines mating success and potential reproductive output in the collared lizard (Crotaphytus collaris). Am Nat 66: 426–436.
  • Lappin AK,Hamilton PS,Sullivan BK. 2006. Bite-force performance and head shape in a sexually dimorphic crevice-dwelling lizard, the common chuckwalla [Sauromalus ater (= obesus)]. Biol J Linn Soc 88: 215–222.
    Direct Link:
  • Lucas PW,Luke DA. 1984. Chewing it over: basic principles of food breakdown. In: ChiversDK,WoodBA,BilsboroughA, editors. Food acquisition and processing in primates. New York: Plenum Press. pp 283–301.
  • Mahler DL,Kearney M. 2006. The palatal dentition in squamate reptiles: morphology, development, attachment, and replacement. Fieldiana Zool 108: 1–61.
  • Marungán-Lobón J,Buscalioni AD. 2003. Disparity of the skull in Archosauria (Reptilia: Diapsida). Biol J Linn Soc 80: 67–88.
    Direct Link:
  • McBrayer LD,Reilly SM. 2002. Prey processing in lizards: Behavioral variation in sit-and-wait and widely foraging taxa. Can J Zool 80: 882–892.
  • Metzger KA,Herrel A. 2005. Correlations between lizard cranial shape and diet: a quantitative, phylogenetically informed analysis. Biol J Linn Soc 86: 433–466.
    Direct Link:
  • Müller J. 2003. Early loss and multiple return of the lower temporal arcade in diapsid reptiles. Naturwissenschaften 90: 473–476.
  • Newman DG. 1987. Tuatara. Endangered New Zealand Wildlife Series. Dunedin: John McIndoe. 25 p.
  • O'Higgins P. 2000. The study of morphological variation in the hominid fossil record: biology, landmarks and geometry. J Anat 197: 103–120.
    Direct Link:
  • O'Higgins P,Jones N. 1999. Morphologika, Tools for Shape Analysis. London: University College London.
  • Olsen EC. 1961. Jaw mechanisms in rhipidistians, amphibians, reptiles. Am Zool 1: 205–215.
  • Parkinson B. 2002. The Tuatara, New Zealand Wild Series, 2nd ed. New Zealand: Reed Publishing. p 32.
  • Pough FH. 1973. Lizard energetics and diet. Ecology 54: 838–844.
  • Preuschoft H,Witzel U. 2002. Biomechanical investigations on the skulls of reptiles and mammals. Senckenbergiana Lethaia 82: 207–222.
  • Rasmussen TE,Callison G. 1981. A new herbivorous sphenodontid (Rhynchocephalia: Reptilia) from the Jurassic of Colorado. J Paleontol 55: 1109–1116.
  • Reilly SM,McBrayer LD,White TD. 2001. Prey processing in amniotes: biomechanical and behavioural patterns of food reduction. Comp Biochem Physiol A Physiol 128: 397–415.
  • Reilly SM,McElroy EJ,Odum RA,Hornyak VA. 2006. Tuataras and salamanders show that walking and running mechanics are ancient features of tetrapod locomotion. Proc R Soc B Biol Sci 273: 1563–1568.
  • Regal PJ. 1966. Feeding specializations and the classification of terrestrial salamanders. Evolution 20: 392–407.
  • Rest JS,Ast JC,Austin CC,Waddell PJ,Tibbetts EA,Hay JM,Mindell DP. 2003. Molecular systematics of primary reptilian lineages and the tuatara mitochondrial genome. Mol Phylogenet 29: 289–297.
  • Reynoso VH. 1996. A Middle Jurassic Sphenodon-like sphenodontian (Diapsida: Lepidosauria) from Huizachal Canyon, Tamaulipas, Mexico. J Vert Paleontol 16: 210–221.
  • Reynoso VH. 1997. A ‘beaded’ sphenodontian (Diapsida: Lepidosauria) from the Early Cretaceous of central Mexico. J Vert Paleontol 17: 52–59.
  • Reynoso VH,Clark JM. 1998. A dwarf sphenodontian from the Jurassic la Boca Formation of Tamaulipas, Mexico. J Vert Paleontol 18: 333–339.
  • Reynoso VH. 2000. An unusual aquatic sphenodontian (Reptilia: Diapsida) from the Tlayua Formation (Albian), central Mexico. J Paleontol 74: 133–148.
  • Reynoso VH,Gómez-Bonilla A. 2000. The Albian Ankylosphenodon pachyostosus sphenodontian of Tlayua, Mexico is not an eilenodontine but a sapheosaur. J Vert Paleontol 20S: 64A.
  • Reynoso VH. 2005. Possible evidence of a venom apparatus in a Middle Jurassic sphenodontian from the Huizachal red beds of Tamaulipas, México. J Vert Paleontol 25: 646–654.
  • Rieppel O. 1984. Miniaturization of the lizard skull: Its function and evolutionary implications. In: FergusonMWJ, editor. The Structure and Development and Evolution of Reptiles, Zoological Society of London Symposia 52. London: Academic Press; pp 503–520.
  • Rieppel O. 1992. The skull in a hatchling of Sphenodon punctatus. J Herpetol 26: 80–84.
  • Rieppel O,deBraga M. 1996. Turtles as diapsid reptiles. Nature 384: 453–455.
  • Robb J. 1977. The Tuatara. Durham: Meadowfield Press Limited. p 70.
  • Robinson PL. 1962. Gliding reptiles from the Upper Keuper of Great Britain. Proc Geol Soc 1601: 137–146.
  • Robinson PL. 1967. Triassic vertebrates from lowland and upland. Sci Cult 33: 169–173.
  • Robinson PL. 1973. A problematic reptile from the British Upper Trias. J Geol Soc 129: 457–479.
  • Robinson PL. 1976. How Sphenodon and Uromastix grow their teeth and use them. In: BellairsAd'A,CoxCB., editors. Morphology and Biology of the Reptiles. London: Academic Press. pp 43–64.
  • Rohlf JF. 1998. tps-DIG, Version 1.2. New York: Stony Brook, SUNY.
  • Romer AS. 1956. Osteology of the Reptiles. Chicago: University of Chicago Press. p 772.
  • Rothery T. 2002. Are there juvenile specimens of the aquatic sphenodontid Pleurosaurus, and if so, what can they tell us about growth in this group? J Vert Paleontol 22S: 100A.
  • Rothery T. 2005. Juvenile pleurosaurs. Unpublished PhD thesis. University of McGill, Canada.
  • Säilä LK. 2005. A new species of the sphenodontian reptile Clevosaurus from the Lower Jurassic of South Wales. Palaeontol 48: 817–831.
    Direct Link:
  • Schwab IR,O'Connor RG. 2004. An enigmatic eye: what can we learn? Clin Exp Ophthal 32: 559–560.
    Direct Link:
  • Schwenk K. 2000. Feeding in Lepidosaurs. In: SchwenkK, editor. Feeding. Form, Function, and Evolution in Tetrapod Vertebrates. San Diego: Academic Press. pp 175–291.
  • Schumacher G-H. 1973a. The head muscles and hyolaryngeal skeleton of turtles and crocodilians, chapter 2. In: GansC,ParsonsTS, editors. Biology of the Reptilia 4 Morphology. London: Academic Press. pp 101–199.
  • Schumacher G-H. 1973b. The maxilla-mandibular apparatus in the light of experimental investigations. In: SchumacherG-H, editors. Morphology of the maxillo-mandibular apparatus. Leipzig: VEB G. Thieme. pp 13–25.
  • Sharell R. 1966. The Tuatara, Lizards and Frogs of New Zealand. London: Collins. p 94.
  • Stayton CT. 2005. Morphometric evolution of the lizard skull: a geometric morphometrics survey. J Morphol 263: 47–59.
    Direct Link:
  • Stayton TC. 2006. Testing hypotheses of convergence with multivariate data: Morphological and functional convergence among herbivorous lizards. Evolution 60: 824–841.
  • Stevens CE,Hume LD. 1998. Contributions of microbes in vertebrate gastrointestinal tract to production and conservation of nutrients. Physiol Rev 78: 393–427.
  • Sues H-D,Shubin NH,Olsen PE. 1994. A new sphenodontian (Lepidosauria: Rhynchocephalia) from the McCoy Brook Formation (Lower Jurassic) of Nova Scotia. Canada. J Vert Paleontol 14: 327–340.
  • Sues H-D,Reisz RB. 1995. First record of the Early Mesozoic sphenodontian Clevosaurus (Lepidosauria: Rhynchocephalia) from the Southern Hemisphere. J Paleontol 69: 123–126.
  • Taylor MA. 1987. How tetrapods feed in the water: a functional analysis by paradigm. Zool J Linn Soc 91: 171–195.
    Direct Link:
  • Taylor MA. 1992. Functional anatomy of the head of the large aquatic predator Rhomaleosaurus zetlandicus (Plesiosauria, Reptilia). Phil Trans R Soc B 335: 247–280.
  • Throckmorton GS,Hopson JA,Parks P. 1981. A redescription of Toxolophosaurus cloudi Olson, a Lower Cretaceous herbivorous sphenodontian reptile. J Paleontol 55: 586–597.
  • Townsend TM,Larson A,Louis E,Macey JR. 2004. Molecular phylogenetics of squamates: the position of snakes, amphibaenians and dibamids, and the root of the squamate tree. Syst Biol 53: 735–757.
  • Tracy MR. 1997. Size variation in tuatara (Sphenodon). N Z J Zool 24: 330A.
  • Ung CY-J,Molteno ACB. 2004. An enigmatic eye: the histology of the tuatara pineal complex. Clin Exp Ophthal 32: 614–618.
    Direct Link:
  • Ussher GT. 1999. Tuatara (Sphenodon punctatus) feeding ecology in the presence of kiore (Rattus exulans). N Z J Zool 26: 117–125.
  • Verwaijen D,Van Damme R,Herrel A. 2002. Relationships between head size, bite force, prey handling efficiency and diet in two sympatric lacertid lizards. Func Ecol 16: 842–850.
    Direct Link:
  • Vézina AF. 1985. Empirical relationships between predator and prey size among terrestrial vertebrate predators. Oecologia 67: 555–565.
  • Vidal N,Hedges B. 2005. The phylogeny of squamate reptiles (lizards, snakes, and amphisbaenians) inferred from nine nuclear protein-coding genes. C R Biol 328: 1000–1008.
  • Vitt LJ,Pianka ER,Cooper WEJr.,Schwenk K. 2003. History and the global ecology of squamate reptiles. Am Nat 162: 44–60.
  • Walls GL. 1981. Feeding ecology of the tuatara (Sphenodon punctatus) on Stephens Island. Cook Strait. N Z J Zool 4: 89–97.
  • Webb JE,Wallwork JA,Elgood JH. 1978. Guide to Living Reptiles. London: Macmillan Press Ltd. p 172.
  • von Wettstein O. 1931. Rhynchocephalia. Kukenthal and Krumbach's Handbuch der Zoologie 7: 1–128,215–235.
  • Whiteside DI. 1986. The head skeleton of the Rhaetian sphenodontid Diphydontosaurus avonis gen. et sp. nov., and the modernising of a living fossil. Phil Trans R Soc Lond B 312: 379–430.
  • Wilson DS. 1975. The adequacy of body size as a niche difference. Am Nat 109: 769–784.
  • Witzel U,Preuschoft H. 2005. Finite-element model construction for the virtual synthesis of the skulls in vertebrates: case study of Diplodocus. Anat Rec A 283: 391–401.
  • Worthy TH. 1997. Quaternary fossil fauna of South Canterbury. South Island, New Zealand. J R Soc N Z 27: 67–162.
  • Worthy TH,Grant-Mackie JA. 2003. Late-Pleistocene avifaunas from Cape Wanbrow. Otago, South Island, New Zealand. J R Soc N Z 33: 427–485.
  • Wroe S,Milne N. 2007. Convergence and remarkable constraint in the evolution of mammalian carnivore skull shape. Evolution 61: 1251–1260.
    Direct Link:
  • Wu X-C. 1994. Late Triassic-Early Jurassic sphenodontians from China and the phylogeny of the Sphenodontia. In: FraserNC,SuesH-D, editors. In the shadow of the dinosaurs: Early Mesozoic tetrapods. Cambridge: Cambridge University Press. pp. 38–69.
  • Wu X-C. 2003. Functional morphology of the temporal region in the Rhynchocephalia. Can J Earth Sci 40: 589–607.
  • Yeh J. 2002. The effect of miniaturized body size on skeletal morphology in frogs. Evolution 56: 628–641.
  • Zardoya R,Meyer A. 1998. Complete mitochondrial genome suggests diapsid affinities of turtles. Evolution 95: 4226–14231.
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