A new heterodontosaurid dinosaur (Reptilia: Ornithischia) from the Upper Triassic Red Beds of Lesotho
Identifieur interne : 00E424 ( Main/Exploration ); précédent : 00E423; suivant : 00E425A new heterodontosaurid dinosaur (Reptilia: Ornithischia) from the Upper Triassic Red Beds of Lesotho
Auteurs : Richard A. Thulborn [Australie]Source :
- Zoological Journal of the Linnean Society [ 0024-4082 ] ; 1974-09.
English descriptors
- KwdEn :
- Angustidens, Annual dormancy, Anterior part, Antorbital, Australis, Beak, Buccal, Buccal surface, Buccal surfaces, Canine, Caniniform, Caniniform teeth, Cave sandstone, Charig, Cheek dentition, Cheek teeth, Cheek teeth inset, Chicago univ, Consors, Coronoid, Coronoid eminence, Cretaceous, Crompton, Crompton charig, Crown length, Dental mill, Dentary, Denticle, Dentition, Diastema, Dinosaur, Fabrosaurus, Fabrosaurus australis, Family heterodontosauridae, Family hypsilophodontidae, Family iguanodontidae, Femur, Femur pendent, Fleshy cheeks, Fourth trochanter, Galton, Graviportal, Graviportal ornithopods, Haughton, Heterodontosaurid, Heterodontosaurid cheek dentition, Heterodontosaurid dentition, Heterodontosaurid dinosaur, Heterodontosauridae, Heterodontosaurids, Heterodontosaurus, Holotype, Inferior margin, Jurassic, Lateral, Lateral face, Lateral view, Longitudinal ridge, Lower cheek teeth, Lower cretaceous, Lower teeth, Lower tusks, Lycorhinus, Lycorhinus angustidens, Lycorhinus angustidens haughton, Lycorhinus consors, Lycorhinus tucki, Male heterodontosaurids, Mandible, Mandibular, Mandibular teeth, Maxilla, Maxillary teeth, Mertii, Occlusal, Ornithischian, Ornithischian dinosaurs, Ornithischian phylogenetic tree, Ornithopod, Ornithopod dinosaurs, Ornithopod evolution, Ornithopoda, Other ornithischians, Pendent, Pisanosaurus, Pisanosaurus mertii, Planar tooth, Prefrontal, Premaxilla, Premaxillary, Prominent coronoid process, Quadrate, Ramus, Rear margin, Romer, Scelidosaurus, Sensu lato, Skull, Skull bones, Skull roof, Stormberg series, Suborder ornithopoda, Such teeth, Thulborn, Tooth generations, Tooth replacement, Triassic, Trochanter, Tucki, Tusk, University college london, Upper cretaceous, Upper jurassic, Upper triassic, Ventral.
- Teeft :
- Angustidens, Annual dormancy, Anterior part, Antorbital, Australis, Beak, Buccal, Buccal surface, Buccal surfaces, Canine, Caniniform, Caniniform teeth, Cave sandstone, Charig, Cheek dentition, Cheek teeth, Cheek teeth inset, Chicago univ, Consors, Coronoid, Coronoid eminence, Cretaceous, Crompton, Crompton charig, Crown length, Dental mill, Dentary, Denticle, Dentition, Diastema, Dinosaur, Fabrosaurus, Fabrosaurus australis, Family heterodontosauridae, Family hypsilophodontidae, Family iguanodontidae, Femur, Femur pendent, Fleshy cheeks, Fourth trochanter, Galton, Graviportal, Graviportal ornithopods, Haughton, Heterodontosaurid, Heterodontosaurid cheek dentition, Heterodontosaurid dentition, Heterodontosaurid dinosaur, Heterodontosauridae, Heterodontosaurids, Heterodontosaurus, Holotype, Inferior margin, Jurassic, Lateral, Lateral face, Lateral view, Longitudinal ridge, Lower cheek teeth, Lower cretaceous, Lower teeth, Lower tusks, Lycorhinus, Lycorhinus angustidens, Lycorhinus angustidens haughton, Lycorhinus consors, Lycorhinus tucki, Male heterodontosaurids, Mandible, Mandibular, Mandibular teeth, Maxilla, Maxillary teeth, Mertii, Occlusal, Ornithischian, Ornithischian dinosaurs, Ornithischian phylogenetic tree, Ornithopod, Ornithopod dinosaurs, Ornithopod evolution, Ornithopoda, Other ornithischians, Pendent, Pisanosaurus, Pisanosaurus mertii, Planar tooth, Prefrontal, Premaxilla, Premaxillary, Prominent coronoid process, Quadrate, Ramus, Rear margin, Romer, Scelidosaurus, Sensu lato, Skull, Skull bones, Skull roof, Stormberg series, Suborder ornithopoda, Such teeth, Thulborn, Tooth generations, Tooth replacement, Triassic, Trochanter, Tucki, Tusk, University college london, Upper cretaceous, Upper jurassic, Upper triassic, Ventral.
Abstract
A new species of ornithischian dinosaur (Lycorhinus consors sp. nov.) is established on a skull from the Upper Triassic Red Beds of Lesotho. This ornithischian is assigned to the family Heterodontosauridae of the suborder Ornithopoda. The dinosaurs of the family Heterodonto‐sauridae are reviewed: Geranosaurus atavus Broom (1911) is considered anomendubium and the genus name Heterodontosaurus Crompton & Charig (1962) is held to be a junior synonym for Lycorhinus Haughton (1924). Functional and palaeoecological implications of the heterodontosaurid dentition are discussed. The pattern of tooth wear may reflect a highly specialized jaw action which involved protraction and retraction of the mandible to produce a grinding effect between upper and lower cheek teeth. Lycorhinus consors is presumed to be a female heterodontosaurid because it differs from all other heterodontosaurids in lacking caniniform tusks. It is suggested that the tusks of heterodontosaurids were functionally analogous to those of tayassuids and tragulids and that they were employed as weapons for intra‐specific combat and defence. Dental peculiarities indicate that tooth replacement processes were suppressed in heterodontosaurids; replacement of the teeth seems to have been restricted to a brief period each year (presumably when heterodontosaurids underwent aestivation or hibernation). A new diagnosis is formulated for the family Heterodontosauridae. The relationships of early ornithopod dinosaurs are briefly reviewed and a new classification is proposed. Ten families of ornithopod dinosaurs are recognized; these are ranked in two grades‐one (named Dolichopoda) representing the conservative main stem of the ornithischian phylogenetic tree and the other (named Brachypoda) comprising the several more advanced lines of ornithopod evolution.
Url:
DOI: 10.1111/j.1096-3642.1974.tb01591.x
Affiliations:
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Thulborn</name><affiliation wicri:level="1"><country xml:lang="fr">Australie</country><wicri:regionArea>Department of Zoology, University of Queensland. St. Lucia, Queensland 4067</wicri:regionArea><wicri:noRegion>Queensland 4067</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Zoological Journal of the Linnean Society</title><title level="j" type="alt">ZOOLOGICAL JOURNAL OF THE LINNEAN SOCIETY</title><idno type="ISSN">0024-4082</idno><idno type="eISSN">1096-3642</idno><imprint><biblScope unit="vol">55</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="151">151</biblScope><biblScope unit="page" to="175">175</biblScope><biblScope unit="page-count">25</biblScope><publisher>Blackwell Publishing Ltd</publisher><pubPlace>Oxford, UK</pubPlace><date type="published" when="1974-09">1974-09</date></imprint><idno type="ISSN">0024-4082</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0024-4082</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Angustidens</term><term>Annual 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trochanter</term><term>Galton</term><term>Graviportal</term><term>Graviportal ornithopods</term><term>Haughton</term><term>Heterodontosaurid</term><term>Heterodontosaurid cheek dentition</term><term>Heterodontosaurid dentition</term><term>Heterodontosaurid dinosaur</term><term>Heterodontosauridae</term><term>Heterodontosaurids</term><term>Heterodontosaurus</term><term>Holotype</term><term>Inferior margin</term><term>Jurassic</term><term>Lateral</term><term>Lateral face</term><term>Lateral view</term><term>Longitudinal ridge</term><term>Lower cheek teeth</term><term>Lower cretaceous</term><term>Lower teeth</term><term>Lower tusks</term><term>Lycorhinus</term><term>Lycorhinus angustidens</term><term>Lycorhinus angustidens haughton</term><term>Lycorhinus consors</term><term>Lycorhinus tucki</term><term>Male heterodontosaurids</term><term>Mandible</term><term>Mandibular</term><term>Mandibular teeth</term><term>Maxilla</term><term>Maxillary teeth</term><term>Mertii</term><term>Occlusal</term><term>Ornithischian</term><term>Ornithischian dinosaurs</term><term>Ornithischian phylogenetic tree</term><term>Ornithopod</term><term>Ornithopod dinosaurs</term><term>Ornithopod evolution</term><term>Ornithopoda</term><term>Other ornithischians</term><term>Pendent</term><term>Pisanosaurus</term><term>Pisanosaurus mertii</term><term>Planar tooth</term><term>Prefrontal</term><term>Premaxilla</term><term>Premaxillary</term><term>Prominent coronoid process</term><term>Quadrate</term><term>Ramus</term><term>Rear margin</term><term>Romer</term><term>Scelidosaurus</term><term>Sensu lato</term><term>Skull</term><term>Skull bones</term><term>Skull roof</term><term>Stormberg series</term><term>Suborder ornithopoda</term><term>Such teeth</term><term>Thulborn</term><term>Tooth generations</term><term>Tooth replacement</term><term>Triassic</term><term>Trochanter</term><term>Tucki</term><term>Tusk</term><term>University college london</term><term>Upper cretaceous</term><term>Upper jurassic</term><term>Upper triassic</term><term>Ventral</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Angustidens</term><term>Annual dormancy</term><term>Anterior part</term><term>Antorbital</term><term>Australis</term><term>Beak</term><term>Buccal</term><term>Buccal surface</term><term>Buccal surfaces</term><term>Canine</term><term>Caniniform</term><term>Caniniform teeth</term><term>Cave sandstone</term><term>Charig</term><term>Cheek dentition</term><term>Cheek teeth</term><term>Cheek teeth inset</term><term>Chicago univ</term><term>Consors</term><term>Coronoid</term><term>Coronoid eminence</term><term>Cretaceous</term><term>Crompton</term><term>Crompton charig</term><term>Crown length</term><term>Dental mill</term><term>Dentary</term><term>Denticle</term><term>Dentition</term><term>Diastema</term><term>Dinosaur</term><term>Fabrosaurus</term><term>Fabrosaurus australis</term><term>Family heterodontosauridae</term><term>Family hypsilophodontidae</term><term>Family iguanodontidae</term><term>Femur</term><term>Femur pendent</term><term>Fleshy cheeks</term><term>Fourth trochanter</term><term>Galton</term><term>Graviportal</term><term>Graviportal ornithopods</term><term>Haughton</term><term>Heterodontosaurid</term><term>Heterodontosaurid cheek dentition</term><term>Heterodontosaurid dentition</term><term>Heterodontosaurid dinosaur</term><term>Heterodontosauridae</term><term>Heterodontosaurids</term><term>Heterodontosaurus</term><term>Holotype</term><term>Inferior margin</term><term>Jurassic</term><term>Lateral</term><term>Lateral face</term><term>Lateral view</term><term>Longitudinal ridge</term><term>Lower cheek teeth</term><term>Lower cretaceous</term><term>Lower teeth</term><term>Lower tusks</term><term>Lycorhinus</term><term>Lycorhinus angustidens</term><term>Lycorhinus angustidens haughton</term><term>Lycorhinus consors</term><term>Lycorhinus tucki</term><term>Male heterodontosaurids</term><term>Mandible</term><term>Mandibular</term><term>Mandibular teeth</term><term>Maxilla</term><term>Maxillary teeth</term><term>Mertii</term><term>Occlusal</term><term>Ornithischian</term><term>Ornithischian dinosaurs</term><term>Ornithischian phylogenetic tree</term><term>Ornithopod</term><term>Ornithopod dinosaurs</term><term>Ornithopod evolution</term><term>Ornithopoda</term><term>Other ornithischians</term><term>Pendent</term><term>Pisanosaurus</term><term>Pisanosaurus mertii</term><term>Planar tooth</term><term>Prefrontal</term><term>Premaxilla</term><term>Premaxillary</term><term>Prominent coronoid process</term><term>Quadrate</term><term>Ramus</term><term>Rear margin</term><term>Romer</term><term>Scelidosaurus</term><term>Sensu lato</term><term>Skull</term><term>Skull bones</term><term>Skull roof</term><term>Stormberg series</term><term>Suborder ornithopoda</term><term>Such teeth</term><term>Thulborn</term><term>Tooth generations</term><term>Tooth replacement</term><term>Triassic</term><term>Trochanter</term><term>Tucki</term><term>Tusk</term><term>University college london</term><term>Upper cretaceous</term><term>Upper jurassic</term><term>Upper triassic</term><term>Ventral</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">A new species of ornithischian dinosaur (Lycorhinus consors sp. nov.) is established on a skull from the Upper Triassic Red Beds of Lesotho. This ornithischian is assigned to the family Heterodontosauridae of the suborder Ornithopoda. The dinosaurs of the family Heterodonto‐sauridae are reviewed: Geranosaurus atavus Broom (1911) is considered anomendubium and the genus name Heterodontosaurus Crompton & Charig (1962) is held to be a junior synonym for Lycorhinus Haughton (1924). Functional and palaeoecological implications of the heterodontosaurid dentition are discussed. The pattern of tooth wear may reflect a highly specialized jaw action which involved protraction and retraction of the mandible to produce a grinding effect between upper and lower cheek teeth. Lycorhinus consors is presumed to be a female heterodontosaurid because it differs from all other heterodontosaurids in lacking caniniform tusks. It is suggested that the tusks of heterodontosaurids were functionally analogous to those of tayassuids and tragulids and that they were employed as weapons for intra‐specific combat and defence. Dental peculiarities indicate that tooth replacement processes were suppressed in heterodontosaurids; replacement of the teeth seems to have been restricted to a brief period each year (presumably when heterodontosaurids underwent aestivation or hibernation). A new diagnosis is formulated for the family Heterodontosauridae. The relationships of early ornithopod dinosaurs are briefly reviewed and a new classification is proposed. Ten families of ornithopod dinosaurs are recognized; these are ranked in two grades‐one (named Dolichopoda) representing the conservative main stem of the ornithischian phylogenetic tree and the other (named Brachypoda) comprising the several more advanced lines of ornithopod evolution.</div></front></TEI><affiliations><list><country><li>Australie</li></country></list><tree><country name="Australie"><noRegion><name sortKey="Thulborn, Richard A" sort="Thulborn, Richard A" uniqKey="Thulborn R" first="Richard A." last="Thulborn">Richard A. Thulborn</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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