dent

Partie anatomique

59 image(s) · 34 Actualités

Galerie d'images

Partial skull of Manidens condorensis from the Middle Jurassic Cañadón Asfalto Formation of Argentina. Skull reconstructions in lateral view. Dashed lines indicate estimated edges. Abbreviations: a angular antfo antorbital fossa asaf anterior surangular foramen be buccal emargination bo basioccipital bt basal tubera d dentary d1, 2, 11 dentary tooth 1, 2, 11 emfo external mandibular fossa f frontal gl glenoid gr groove j jugal jfl jugal flange jh jugal horn m maxilla m1, 11 maxillary tooth 1, 11 n nasal pd predentary pm premaxilla po postorbital pof postorbital fossa popr paroccipital process q quadrate qj quadratojugal ri ridge sa surangular sq squamosal.
Taxons Manidens

Partial skull of Manidens condorensis from the Middle Jurassic Cañadón Asfalto Formation of Argentina. Skull reconstructions in lateral view. Dashed lines indicate estimated edges. Abbreviations: a angular antfo antorbital fossa asaf anterior surangular foramen be buccal emargination bo basioccipital bt basal tubera d dentary d1, 2, 11 dentary tooth 1, 2, 11 emfo external mandibular fossa f frontal gl glenoid gr groove j jugal jfl jugal flange jh jugal horn m maxilla m1, 11 maxillary tooth 1, 11 n nasal pd predentary pm premaxilla po postorbital pof postorbital fossa popr paroccipital process q quadrate qj quadratojugal ri ridge sa surangular sq squamosal.

dent Argentine Jurassique Jurassique moyen +4
Cranial and postcranial sauropod remains from sediments of the Praia da Amoreira-Porto Novo Fm. of the coastal sector of Praia da Consolação-Lourinhã-Torres Vedras: 1-2, ?Turiasauria indet., heart-shaped tooth (SHN (JJS) 142, Praia da Corva) in lingual (1) and labial (2) views; 3-4, ?Macronaria indet., spatulate tooth (SHN 513, Porto Novo) in labial (3) and lingual (4) views; 5-6, Macronaria indet., compressed cone-chisel-shaped tooth (SHN 578, Valmitão) in lingual (5) and labial (6) views; 7-8, Eusauropoda indet., partial left maxilla (SHN 582, Praia dos Frades) in lateral (7) and posterior (8) views; 9, Titanosauriformes indet., posterior caudal vertebra (SHN 523, Praia da Corva) in right view; 10-12, Diplodocinae indet., partial skeleton (SHN (JJS) 177, Valmitão), anterior caudal neural spine in posterior view (10), anterior caudal centrum in right view (11) and left ischium in medial view (12); 13-16, holotype material of Zby atlanticus (ML 368, Vale de Pombas), right ungueal I in lateral view (13), right humerus in anterior view (14), right radius in posterior view (15), right ulna in lateral view (16); 17, Eusauropoda indet., partial distal forked-chevron (SHN 587, Praia da Corva) in medial view; 18, Sauropoda indet., pedal ungueal I (SHN 524, Praia de Pedrogãos) in lateral view; 19-22, Macronarian indet., partial skeleton (SHN 181, Valmitão), right astragalus in proximal view (19), anterior caudal vertebra in anterior view (20), right tibia in lateral view (21) and right fibula in medial view (22); 23-24, Eusauropoda indet., partial skeleton (SHN 530, Praia da Corva), anterior chevron in anterior view (23) and anterior caudal vertebra in posterior view (24); 25, cf. Duriatitan humerocristatus, humerus (MG 4976, Praia dos Frades) in anterior view; 26, Sauropoda indet., partial skeleton (SHN 534, Santa Rita), middle chevron in posterior view; 27, Diplodocidae indet., partial skeleton (SHN (JJS) 179, Praia Vermelha), dorsal/caudal (?) neural spine in posterior view; 28-30, holotype material of Dinheirosaurus lourinhanensis (ML 414, Porto Dinheiro), proximal end of a dorsal rib in anterior view (28), anterior caudal neural spine in posterior view (29) and articulated dorsal vertebrae in right view (30). Black scale bar: 10 cm; Grey scale bar: 5 cm; Brown scale bar: 1 cm. See Anatomical abbreviations for abbreviations.
Taxons Zby

Cranial and postcranial sauropod remains from sediments of the Praia da Amoreira-Porto Novo Fm. of the coastal sector of Praia da Consolação-Lourinhã-Torres Vedras: 1-2, ?Turiasauria indet., heart-shaped tooth (SHN (JJS) 142, Praia da Corva) in lingual (1) and labial (2) views; 3-4, ?Macronaria indet., spatulate tooth (SHN 513, Porto Novo) in labial (3) and lingual (4) views; 5-6, Macronaria indet., compressed cone-chisel-shaped tooth (SHN 578, Valmitão) in lingual (5) and labial (6) views; 7-8, Eusauropoda indet., partial left maxilla (SHN 582, Praia dos Frades) in lateral (7) and posterior (8) views; 9, Titanosauriformes indet., posterior caudal vertebra (SHN 523, Praia da Corva) in right view; 10-12, Diplodocinae indet., partial skeleton (SHN (JJS) 177, Valmitão), anterior caudal neural spine in posterior view (10), anterior caudal centrum in right view (11) and left ischium in medial view (12); 13-16, holotype material of Zby atlanticus (ML 368, Vale de Pombas), right ungueal I in lateral view (13), right humerus in anterior view (14), right radius in posterior view (15), right ulna in lateral view (16); 17, Eusauropoda indet., partial distal forked-chevron (SHN 587, Praia da Corva) in medial view; 18, Sauropoda indet., pedal ungueal I (SHN 524, Praia de Pedrogãos) in lateral view; 19-22, Macronarian indet., partial skeleton (SHN 181, Valmitão), right astragalus in proximal view (19), anterior caudal vertebra in anterior view (20), right tibia in lateral view (21) and right fibula in medial view (22); 23-24, Eusauropoda indet., partial skeleton (SHN 530, Praia da Corva), anterior chevron in anterior view (23) and anterior caudal vertebra in posterior view (24); 25, cf. Duriatitan humerocristatus, humerus (MG 4976, Praia dos Frades) in anterior view; 26, Sauropoda indet., partial skeleton (SHN 534, Santa Rita), middle chevron in posterior view; 27, Diplodocidae indet., partial skeleton (SHN (JJS) 179, Praia Vermelha), dorsal/caudal (?) neural spine in posterior view; 28-30, holotype material of Dinheirosaurus lourinhanensis (ML 414, Porto Dinheiro), proximal end of a dorsal rib in anterior view (28), anterior caudal neural spine in posterior view (29) and articulated dorsal vertebrae in right view (30). Black scale bar: 10 cm; Grey scale bar: 5 cm; Brown scale bar: 1 cm. See Anatomical abbreviations for abbreviations.

humérus écaille dent vertèbre +13
Figure 1, 1a. Outer and oral aspects of the imperfect dentary bone of Sarcolestes Leedsi, from the Oxford Clay of Peterborough. 2/3 nat size. s = symphysis. Figure 1b. A single tooth of the former. 3/1 nat size. Figure 2, 2a. Outer aspect and quadratic cavity of the hinder region of the same jaw. 2/3 nat size. Figure 3. A single tooth of Priodontognathus Phillipsi, 3/1 nat size, shown for purposes of comparison. Specimen in the Woodwardian Museum, Cambridge.
Taxons Sarcolestes

Figure 1, 1a. Outer and oral aspects of the imperfect dentary bone of Sarcolestes Leedsi, from the Oxford Clay of Peterborough. 2/3 nat size. s = symphysis. Figure 1b. A single tooth of the former. 3/1 nat size. Figure 2, 2a. Outer aspect and quadratic cavity of the hinder region of the same jaw. 2/3 nat size. Figure 3. A single tooth of Priodontognathus Phillipsi, 3/1 nat size, shown for purposes of comparison. Specimen in the Woodwardian Museum, Cambridge.

os dent musée Oxford Clay +3
Photographs and interpretive drawings of the titanosauroid Bonitasaura salgadoi Apesteguía, 2004 from the Upper Neuquén Group of Río Negro
province, Patagonia, MPCA 460. A–D. Right dentary in dorsal (A), medial (B), ventral (C), and lateral (D) views. E. Isolated tooth in labial (E1) and lateral

(E2) views; lingual view detail and schematic cross section showing hexagonal faceting (E3).
Taxons Bonitasaura

Photographs and interpretive drawings of the titanosauroid Bonitasaura salgadoi Apesteguía, 2004 from the Upper Neuquén Group of Río Negro province, Patagonia, MPCA 460. A–D. Right dentary in dorsal (A), medial (B), ventral (C), and lateral (D) views. E. Isolated tooth in labial (E1) and lateral (E2) views; lingual view detail and schematic cross section showing hexagonal faceting (E3).

dent dessin Bonitasaura
Silhouette of M.intrepidus showing recovered elements. Isolated indet. tyrannosauroid premaxillary tooth (NCSM 33393) recovered from nearby strata in (d) occlusal, (e) mesiodistal, and (f) lingual views. Holotype specimen of M.intrepidus (NCSM 33392) composed of (g) femur, (h) tibia, (i) fourth metatarsal, (j) second metatarsal, and (k) pedal phalanges of the fourth digit. Scale bar (c) 1 m, (g–k) 5 mm. (d–f) Enlarged to show detail, not to scale
Taxons Moros

Silhouette of M.intrepidus showing recovered elements. Isolated indet. tyrannosauroid premaxillary tooth (NCSM 33393) recovered from nearby strata in (d) occlusal, (e) mesiodistal, and (f) lingual views. Holotype specimen of M.intrepidus (NCSM 33392) composed of (g) femur, (h) tibia, (i) fourth metatarsal, (j) second metatarsal, and (k) pedal phalanges of the fourth digit. Scale bar (c) 1 m, (g–k) 5 mm. (d–f) Enlarged to show detail, not to scale

écaille dent holotype spécimen +1
Solitary tooth of a sauropod from Angeac-Charente in France. Based on its morphology, it is not from an unnamed titanosaur like other material from this site, but from an unnamed titanosauriform similar to Ligabuesaurus or Veneosaurus.
Taxons Ligabuesaurus

Solitary tooth of a sauropod from Angeac-Charente in France. Based on its morphology, it is not from an unnamed titanosaur like other material from this site, but from an unnamed titanosauriform similar to Ligabuesaurus or Veneosaurus.

dent France Ligabuesaurus Titanosauria +1
The Holotype batomorph tooth of Antiquaobatis grimmenensis from the Late Pliensbachian (spinatum) of Grimmen (Mecklenburg-Western Pomerania, Germany).
Intervalles Pliensbachian

The Holotype batomorph tooth of Antiquaobatis grimmenensis from the Late Pliensbachian (spinatum) of Grimmen (Mecklenburg-Western Pomerania, Germany).

dent Allemagne Pliensbachien holotype
Tooth of extinct Hybodontidae

View: Occlusal
Datation: Jurássic Sup., Kimmerdgian/Tithonian ~150 Millions years
Geologic horizon: Sub bacia Bombarral-Alcobaça / Lourinhã Fm. - PORTUGAL
Deposit Number: PE02-VET-00087 in CCN Coll.
Scale:  1 mm

Tooth of extinct Hybodontidae View: Occlusal Datation: Jurássic Sup., Kimmerdgian/Tithonian ~150 Millions years Geologic horizon: Sub bacia Bombarral-Alcobaça / Lourinhã Fm. - PORTUGAL Deposit Number: PE02-VET-00087 in CCN Coll. Scale: 1 mm

écaille dent Portugal Alcobaça +3
Identifier: ridpathshistoryo01ridp (find matches)
Title: Ridpath's history of the world; being an account of the ethnic origin, primitive estate, early migrations, social conditions and present promise of the principal families of men ..
Year: 1897 (1890s)
Authors:  Ridpath, John Clark, 1840-1900
Subjects:  World history Ethnology
Publisher:  New York, Merrill & Baker
Contributing Library:  Mugar Memorial Library, Boston University
Digitizing Sponsor:  Boston University

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the belief that the ap-pearance of man on the planet wouldoccur at the earliest practicable moment(so to speak), and that mankind wouldcontinue to nourish to the latest practi-cable date. It is one of the novel con- 82 GREAT RACES OF MANKIND. tradictions in the philosophy of a certainschool of thinkers that they would haveus believe that the earth, fitted up as itwere for the dwelling place of man, laygreen and virgin, waiting for his ap-pearance through eons of useless time—all this for no better reason than to sat-isfy the preconceptions of some impossi-ble system of chronology. Such short-sighted views of nature consistent with the astronomical andgeological preparation of the globe.Reason and fact alike require us to ac-cept as early a date for the appearanceof man as the design of the world andits conditions of habitability will admit.The results of reason must be acceptedin a world governed by law. That thedate of mans appearance was coinci-dent, or nearly coincident, with the
Text Appearing After Image:
.ANDSCAPE OF THE LOWER OOLITE (BEFORE THE AGE OF MAN).—Drawn by Riou. and of man we may at once dismiss asbelonging to the ignorance and blindnessRight reason de- of a former age. WhiledaTeforappS- the demands of right reason anceofman. ft0 not call for a limitless extension of man-life into the past, andwhile such a view is contradicted by sci-entific data which may not be doubted,a rational concept of the human race inrelation with the planetary life uponwhich it is maintained does call for aswide and far-reaching an arena as is astronomical changes in the characterof the earths orbit heretofore described,can not well be doubted by any onewhose mind has been freed from nar-row preconceptions on the subject.That our race career, measuring back-ward through the brief historical andtraditional periods of our ethnic life, hasextended far enough into the past tocover a considerable part of the planetlife with which it is associated, is a con-clusion warranted by every condition of TIME

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Identifier: ridpathshistoryo01ridp (find matches) Title: Ridpath's history of the world; being an account of the ethnic origin, primitive estate, early migrations, social conditions and present promise of the principal families of men .. Year: 1897 (1890s) Authors: Ridpath, John Clark, 1840-1900 Subjects: World history Ethnology Publisher: New York, Merrill & Baker Contributing Library: Mugar Memorial Library, Boston University Digitizing Sponsor: Boston University View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: the belief that the ap-pearance of man on the planet wouldoccur at the earliest practicable moment(so to speak), and that mankind wouldcontinue to nourish to the latest practi-cable date. It is one of the novel con- 82 GREAT RACES OF MANKIND. tradictions in the philosophy of a certainschool of thinkers that they would haveus believe that the earth, fitted up as itwere for the dwelling place of man, laygreen and virgin, waiting for his ap-pearance through eons of useless time—all this for no better reason than to sat-isfy the preconceptions of some impossi-ble system of chronology. Such short-sighted views of nature consistent with the astronomical andgeological preparation of the globe.Reason and fact alike require us to ac-cept as early a date for the appearanceof man as the design of the world andits conditions of habitability will admit.The results of reason must be acceptedin a world governed by law. That thedate of mans appearance was coinci-dent, or nearly coincident, with the Text Appearing After Image: .ANDSCAPE OF THE LOWER OOLITE (BEFORE THE AGE OF MAN).—Drawn by Riou. and of man we may at once dismiss asbelonging to the ignorance and blindnessRight reason de- of a former age. WhiledaTeforappS- the demands of right reason anceofman. ft0 not call for a limitless extension of man-life into the past, andwhile such a view is contradicted by sci-entific data which may not be doubted,a rational concept of the human race inrelation with the planetary life uponwhich it is maintained does call for aswide and far-reaching an arena as is astronomical changes in the characterof the earths orbit heretofore described,can not well be doubted by any onewhose mind has been freed from nar-row preconceptions on the subject.That our race career, measuring back-ward through the brief historical andtraditional periods of our ethnic life, hasextended far enough into the past tocover a considerable part of the planetlife with which it is associated, is a con-clusion warranted by every condition of TIME Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.

dent migration
Comparaison de la deuxième dent prémaxillaire d'Oromycter (A) et d'Arisierpeton (B) vue au microscope électronique à balayage

Comparaison de la deuxième dent prémaxillaire d'Oromycter (A) et d'Arisierpeton (B) vue au microscope électronique à balayage

dent
Representative taxa from the Santonian Iharkút fauna from the Csehbánya Formation, Bakony Mountains, western Hungary. A Pannoniasaurus inexpectatus (Squamata, Mosasauroidea), dorsal vertebra (MTM uncatalogued) in dorsal view (photo by Réka Kalmár) B Foxemys trabanti (Pleurodira, Bothremydidae), skull (MTM V 2010.215.1.) in dorsal view (photo by Márton Rabi). C Bicuspidon aff. hatzegiensis (Squamata, Borioteiioidea), left dentary (MTM 2006.112.1.) in medial view (photo by László Makádi) D Basal tetanuran (Theropoda, Tetanurae), tooth (MTM V.01.54) in ?lingual view E Indeterminate abelisaurid (Theropoda, Abelisauridae), pedal ungual phalanx (MTM V 2008.43.1.) in lateral view F Pneumatoraptor fodori (Theropoda, Paraves), left scapulocoracoid (holotype, MTM V 2008.38.1.) in lateral view G Mochlodon vorosi (Ornithopoda, Rhabdodontidae), left dentary (holotype, MTM V 2010.105.1) in lateral view H Bakonydraco galaczi (Pterosauria, Azhdarchidae), mandible (holotype, MTM 2007.110.1) in dorsal view I Iharkutosuchus makadii (Eusuchia, Hylaeochampsidae), skull (holotype, MTM 2006.52.1) in dorsal view J Hungarosaurus tormai (Ankylosauria, Nodosauridae), right dentary (MTM 2007.25.2) in lateral view K Bauxitornis mindszentyae (Aves, Enantiornithes), left tarsometatarsus (holotype, MTM V 2009.38.1) in anterior view L Ajkaceratops kozmai (Ceratopsia), fused rostral and premaxillae (holotype, MTM V 2009.192.1) in lateral view. Scale bars: 2 cm in A, V, G, H, I, J; 1 cm in D, E, F, K, L; 1 mm in C.

Representative taxa from the Santonian Iharkút fauna from the Csehbánya Formation, Bakony Mountains, western Hungary. A Pannoniasaurus inexpectatus (Squamata, Mosasauroidea), dorsal vertebra (MTM uncatalogued) in dorsal view (photo by Réka Kalmár) B Foxemys trabanti (Pleurodira, Bothremydidae), skull (MTM V 2010.215.1.) in dorsal view (photo by Márton Rabi). C Bicuspidon aff. hatzegiensis (Squamata, Borioteiioidea), left dentary (MTM 2006.112.1.) in medial view (photo by László Makádi) D Basal tetanuran (Theropoda, Tetanurae), tooth (MTM V.01.54) in ?lingual view E Indeterminate abelisaurid (Theropoda, Abelisauridae), pedal ungual phalanx (MTM V 2008.43.1.) in lateral view F Pneumatoraptor fodori (Theropoda, Paraves), left scapulocoracoid (holotype, MTM V 2008.38.1.) in lateral view G Mochlodon vorosi (Ornithopoda, Rhabdodontidae), left dentary (holotype, MTM V 2010.105.1) in lateral view H Bakonydraco galaczi (Pterosauria, Azhdarchidae), mandible (holotype, MTM 2007.110.1) in dorsal view I Iharkutosuchus makadii (Eusuchia, Hylaeochampsidae), skull (holotype, MTM 2006.52.1) in dorsal view J Hungarosaurus tormai (Ankylosauria, Nodosauridae), right dentary (MTM 2007.25.2) in lateral view K Bauxitornis mindszentyae (Aves, Enantiornithes), left tarsometatarsus (holotype, MTM V 2009.38.1) in anterior view L Ajkaceratops kozmai (Ceratopsia), fused rostral and premaxillae (holotype, MTM V 2009.192.1) in lateral view. Scale bars: 2 cm in A, V, G, H, I, J; 1 cm in D, E, F, K, L; 1 mm in C.

dent vertèbre Hongrie Santonien +15
Comparisons of Victorian ornithopod maxillae in lateral view and schematics, showing dorsalmost extent of the maxillary ramus (indicated by large arrows): (1) Galleonosaurus dorisae n. gen. n sp., holotypic left maxilla (NMV P229196); (2) Atlascopcosaurus loadsi Rich and Rich, 1989, left maxilla (NMV P157390); (3) cast of original holotypic left maxilla of Atlascopcosaurus loadsi (NMV P166409). alv = alveolus; bur = buccal ridge; lpf = lateral palatine flange of maxilla; m#’ = maxillary tooth position (from posterior end) and replacement number; ml = medial lamina of maxilla; mra = maxillary ramus; nvt = neurovascular tract; plp = posterolateral process of maxilla; pmp = posteromedial process of maxilla; sal = supralveolar lamina of maxilla. Scale bars = 10 mm.

Comparisons of Victorian ornithopod maxillae in lateral view and schematics, showing dorsalmost extent of the maxillary ramus (indicated by large arrows): (1) Galleonosaurus dorisae n. gen. n sp., holotypic left maxilla (NMV P229196); (2) Atlascopcosaurus loadsi Rich and Rich, 1989, left maxilla (NMV P157390); (3) cast of original holotypic left maxilla of Atlascopcosaurus loadsi (NMV P166409). alv = alveolus; bur = buccal ridge; lpf = lateral palatine flange of maxilla; m#’ = maxillary tooth position (from posterior end) and replacement number; ml = medial lamina of maxilla; mra = maxillary ramus; nvt = neurovascular tract; plp = posterolateral process of maxilla; pmp = posteromedial process of maxilla; sal = supralveolar lamina of maxilla. Scale bars = 10 mm.

écaille dent moulage Atlascopcosaurus +1
A tooth tip from the theropod dinosaur Nuthetes destructor from the Lulworth Formation, England

A tooth tip from the theropod dinosaur Nuthetes destructor from the Lulworth Formation, England

dent Coeluridae Dinosauria Nuthetes +1
Piratosaurus holotype tooth USNM V 1000
Taxons Piratosaurus

Piratosaurus holotype tooth USNM V 1000

dent holotype Piratosaurus
Photographs of Melkamter pateko (MPEF-PV 11530), visible in medial views on the main block (1) with inset of the tooth (1B) and counterslab (2);. Rendered CT scan detail images (dashed areas represent visible bone that was too thin to be captured by CT scan) of the cranial fragment (1A), manual metacarpal (1C) and dorsal vertebrae (1D–F). Abbreviations: a = alveoli; if = infratemporal fenestra; j = jugal; l = lacrimal; m = maxilla; o = orbit; naof = Nnasoantorbital fenestra; np = nasal process; pm = premaxilla; po = postorbital; q = quadrate; qj = quadratojugal; s = squamosal; t = tooth; vas = vestigial ascending process.
Taxons Melkamter

Photographs of Melkamter pateko (MPEF-PV 11530), visible in medial views on the main block (1) with inset of the tooth (1B) and counterslab (2);. Rendered CT scan detail images (dashed areas represent visible bone that was too thin to be captured by CT scan) of the cranial fragment (1A), manual metacarpal (1C) and dorsal vertebrae (1D–F). Abbreviations: a = alveoli; if = infratemporal fenestra; j = jugal; l = lacrimal; m = maxilla; o = orbit; naof = Nnasoantorbital fenestra; np = nasal process; pm = premaxilla; po = postorbital; q = quadrate; qj = quadratojugal; s = squamosal; t = tooth; vas = vestigial ascending process.

os dent Melkamter tomographie
Photograph (A) and line drawings (B) of Gladocephaloideus jingangshanensis (JPM 2014–004). Abbreviations: ca, carpals; cr, coracoids; cv, cervical vertebrae; d, dentray; dg, deep groove along the mid-line of the mandibular symphysis; dv, dorsal vertebrae; dr, dorsal ribs; etp, extensor tendon process; f, frontal; fc, fifth carpal; fe, femur; fi, fibula; fin, fingers; h, humerus; il, ilium; m, maxilla; mmttsI-IV, metatrals I-IV; mttv, metatarsal V; nao, nasoantorbital opening; or, orbital; pcr, parietal crest; pm, premaxilla; pt, pteroid; ra, radius; rdl, radiale; sc, scapula; st, sternum; sl, sclerotic rings; t, teeth; tc, tooth sockets; ti, tibia; ul, ulna; wm, wing metacarpal; wph1-4, wing phalanges 1–4. Scale bar = 5 cm.
Taxons Gladocephaloideus

Photograph (A) and line drawings (B) of Gladocephaloideus jingangshanensis (JPM 2014–004). Abbreviations: ca, carpals; cr, coracoids; cv, cervical vertebrae; d, dentray; dg, deep groove along the mid-line of the mandibular symphysis; dv, dorsal vertebrae; dr, dorsal ribs; etp, extensor tendon process; f, frontal; fc, fifth carpal; fe, femur; fi, fibula; fin, fingers; h, humerus; il, ilium; m, maxilla; mmttsI-IV, metatrals I-IV; mttv, metatarsal V; nao, nasoantorbital opening; or, orbital; pcr, parietal crest; pm, premaxilla; pt, pteroid; ra, radius; rdl, radiale; sc, scapula; st, sternum; sl, sclerotic rings; t, teeth; tc, tooth sockets; ti, tibia; ul, ulna; wm, wing metacarpal; wph1-4, wing phalanges 1–4. Scale bar = 5 cm.

crête humérus écaille dent +2
1 2 3 4

Actualités

Des ossements anciens révèlent des rituels de victoire effrayants après les premières guerres d’Europe
os dent France
De nouvelles preuves provenant de charniers néolithiques dans le nord-est de la France suggèrent que certaines des premières confrontations violentes en Europe n’étaient pas des actes de brutalité aléatoires, mais des démonstrations de pouvoir soigneusement mises en scène. En analysant des indices chimiques contenus dans des os et des dents anciennes, les chercheurs ont découvert que de nombreuses victimes étaient des étrangers qui avaient subi une violence extrême et ritualisée après le conflit. Les armes coupées semblent avoir été prises sur des ennemis locaux tués au combat, tandis que des captifs venus de plus loin ont été exécutés dans un gri
08/02/2026 sciencedaily ⚙ Traduction automatique
Cet étrange petit dinosaure oblige à repenser l'évolution
os dent métabolisme Dinosauria Foskeia anatomie oiseau évolution mammifères étude crâne
Un petit dinosaure nouvellement identifié, Foskeia pelendonum, bouleverse les idées reçues de longue date sur l'évolution des dinosaures herbivores. Même si les adultes adultes étaient remarquablement petits et légers, leur anatomie était tout sauf simple : elles présentaient un crâne bizarre et hautement spécialisé et des traits évolutifs inattendus. Des études osseuses détaillées montrent que ces dinosaures ont mûri rapidement avec un métabolisme semblable à celui des oiseaux ou des mammifères, tandis que leurs dents et leur posture suggèrent une vie rapide et agile dans des forêts denses.
03/02/2026 sciencedaily ⚙ Traduction automatique
Un visage fossile vieux de 1,5 million d’années oblige à repenser les origines humaines
dent migration Éthiopie fossile découverte origine humaine
Des scientifiques ont reconstruit numériquement le visage d'un fossile d'Homo erectus vieux de 1,5 million d'années provenant d'Éthiopie, révélant ainsi une apparence étonnamment primitive. Bien que son boîtier crânien corresponde à celui de l'Homo erectus classique, le visage et les dents ressemblent à des ancêtres humains beaucoup plus anciens. Cette découverte remet en question les idées reçues de longue date sur le lieu et la manière dont Homo erectus a évolué. Cela fait également allusion à un réseau complexe de migrations et à un possible mélange entre les premières espèces humaines.
16/12/2025 sciencedaily ⚙ Traduction automatique
Des monstres marins géants vivaient dans les rivières à la fin de l'ère des dinosaures
dent alimentation prédateur Dinosauria Mosasaurus isotope
Les mosasaures géants, autrefois considérés comme des prédateurs strictement océaniques, ont peut-être passé leur dernier chapitre à rôder dans les rivières d'eau douce aux côtés de dinosaures et de crocodiles. Une dent massive trouvée dans le Dakota du Nord, analysée à l'aide de techniques isotopiques chimiques, révèle que certains mosasaures se sont adaptés aux systèmes fluviaux à mesure que les mers se rafraîchissaient progressivement vers la fin de l'ère des dinosaures. Ces énormes reptiles, peut-être aussi longs qu'un bus, semblent avoir chassé près de la surface, se nourrissant peut-être même de dinosaures noyés.
15/12/2025 sciencedaily ⚙ Traduction automatique
Un mini-prédateur vieux de 242 millions d'années change l'évolution du lézard
membre dent prédateur fossile évolution nouvelle espèce crâne
Un minuscule fossile du Devon vieux de 242 millions d’années bouleverse les hypothèses des scientifiques sur les premiers membres de la lignée des lézards. Au lieu des charnières du crâne et des dents du palais typiques des lézards et des serpents modernes, cette ancienne créature présente un mélange surprenant de traits primitifs et inhabituels, ainsi que des dents étonnamment grandes en forme de lame. Les scans synchrotron haute résolution ont révélé des détails invisibles à l'œil nu, aidant ainsi les chercheurs à nommer la nouvelle espèce Agriodontosaurus helsbypetrae
30/11/2025 sciencedaily ⚙ Traduction automatique
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