Bone histology of Silesaurus opolensis from the Late Triassic of Poland
Identifieur interne : 007292 ( Istex/Curation ); précédent : 007291; suivant : 007293Bone histology of Silesaurus opolensis from the Late Triassic of Poland
Auteurs : Łucja Fostowicz-Frelik [Pologne] ; Tomasz Sulej [Pologne]Source :
- Lethaia [ 0024-1164 ] ; 2010-06.
Descripteurs français
- Wicri :
- topic : Histologie.
English descriptors
- KwdEn :
- Archosaur, Archosauria, Archosaurian groups, Avascular, Avascular transition zone, Bone deposition, Bone drift, Bone histology, Bone microstructure, Bone tissue, Bres, California press, Canal, Cancellous, Cancellous bone, Caudal vertebrae, Chinsamy, Circumferential, Circumferential layer, Cortex, Cortical region, Dinosaur, Dinosauria, Dzik, Dzik sulej, Endosteal, Erosion cavities, Femur, Femur zpal, Growth rate, Growth rates, Haversian remodelling, Histology, Horner, Internal circumferential layer, Internal cortex, Irmis, Lacuna, Lamellar, Langer benton, Large tibia zpal, Largest specimens, Late triassic, Lethaia, Long bones, Marrow cavity, Matrix, Medullar, Medullar cavity, Medullar region, Metaphyseal region, Microstructure, Normal light, Opolensis, Ornithischian, Osteons, Outer cortex, Padian, Paleontology, Perimedullar, Perimedullar region, Phylogenetic, Phylogenetic relationships, Primary canals, Primary osteons, Remodelling, Reversal line, Ricqles, Sacral, Secondary osteons, Silesaurus, Silesaurus opolensis, Silesaurus opolensis dzik, Silesaurus opolensis lethaia, Small dinosaurs, Specimen zpal, Specimens zpal, Sulej, Suture, Systematic palaeontology, Thin sections, Tibia, Trabecula, Transition zone, Triassic, Vascular canals, Vascularization, Vascularized, Vertebra, Vertebral column, Vertebrate, Vertebrate paleontology, Victorian hypsilophodontid, Zpal.
- Teeft :
- Archosaur, Archosauria, Archosaurian groups, Avascular, Avascular transition zone, Bone deposition, Bone drift, Bone histology, Bone microstructure, Bone tissue, Bres, California press, Canal, Cancellous, Cancellous bone, Caudal vertebrae, Chinsamy, Circumferential, Circumferential layer, Cortex, Cortical region, Dinosaur, Dinosauria, Dzik, Dzik sulej, Endosteal, Erosion cavities, Femur, Femur zpal, Growth rate, Growth rates, Haversian remodelling, Histology, Horner, Internal circumferential layer, Internal cortex, Irmis, Lacuna, Lamellar, Langer benton, Large tibia zpal, Largest specimens, Late triassic, Lethaia, Long bones, Marrow cavity, Matrix, Medullar, Medullar cavity, Medullar region, Metaphyseal region, Microstructure, Normal light, Opolensis, Ornithischian, Osteons, Outer cortex, Padian, Paleontology, Perimedullar, Perimedullar region, Phylogenetic, Phylogenetic relationships, Primary canals, Primary osteons, Remodelling, Reversal line, Ricqles, Sacral, Secondary osteons, Silesaurus, Silesaurus opolensis, Silesaurus opolensis dzik, Silesaurus opolensis lethaia, Small dinosaurs, Specimen zpal, Specimens zpal, Sulej, Suture, Systematic palaeontology, Thin sections, Tibia, Trabecula, Transition zone, Triassic, Vascular canals, Vascularization, Vascularized, Vertebra, Vertebral column, Vertebrate, Vertebrate paleontology, Victorian hypsilophodontid, Zpal.
Abstract
Fostowicz‐Frelik, Ł. & Sulej, T. 2009: Bone histology of Silesaurus opolensisDzik, 2003 from the Late Triassic of Poland. Lethaia, Vol. 43, pp. 137–148. The phylogenetic relationships of Silesaurus opolensis have been the subject of intense debate since its discovery. Silesaurus possesses some features characteristic of ornithischian dinosaurs, such as the presence of a beak at the front of the lower jaw, yet it lacks a number of important femoral and dental synapomorphies of Dinosauria. The microstructure of the long bones (femur, tibia and metatarsal) and ribs of this species reveals a relatively intensive rate of growth, comparable with that seen in small dinosaurs and the gracile crocodylomorph Terrestrisuchus. Cortical bone formed mainly by periosteal tissue with fibro‐lamellar matrix (in older specimens parallel fibred) shows very little secondary remodelling and only in one specimen (large tibia ZPAL Ab III/1885) few lines of arrested growth are present in the outermost cortex. The vascularization is relatively dense, mainly longitudinal and ceases towards the periphery, forming almost avascular parallel fibred bone at the bone surface. This indicates maturation and significant decrease in the growth ratio in mature specimens of S. opolensis. The delicate trabeculae exhibit cores formed by the primary cancellous tissue lined with lamellar endosteal bone. The rather intense growth of S. opolensis implies a relatively high metabolic rate. Moreover, evidence from the fibro‐lamellar tissue, predominant in the cortex, suggests that this kind of rapid bone deposition could be more typical of Archosauria than previously assumed, a prerequisite for the evolution of the very fast growth rates observed in large ornithischians, sauropods and large theropods. □Archosauria, Bone histology, Dinosauriformes, Late Triassic, Silesaurus opolensis.
Url:
DOI: 10.1111/j.1502-3931.2009.00179.x
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<term>Archosauria</term>
<term>Archosaurian groups</term>
<term>Avascular</term>
<term>Avascular transition zone</term>
<term>Bone deposition</term>
<term>Bone drift</term>
<term>Bone histology</term>
<term>Bone microstructure</term>
<term>Bone tissue</term>
<term>Bres</term>
<term>California press</term>
<term>Canal</term>
<term>Cancellous</term>
<term>Cancellous bone</term>
<term>Caudal vertebrae</term>
<term>Chinsamy</term>
<term>Circumferential</term>
<term>Circumferential layer</term>
<term>Cortex</term>
<term>Cortical region</term>
<term>Dinosaur</term>
<term>Dinosauria</term>
<term>Dzik</term>
<term>Dzik sulej</term>
<term>Endosteal</term>
<term>Erosion cavities</term>
<term>Femur</term>
<term>Femur zpal</term>
<term>Growth rate</term>
<term>Growth rates</term>
<term>Haversian remodelling</term>
<term>Histology</term>
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<term>Internal cortex</term>
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<term>Lamellar</term>
<term>Langer benton</term>
<term>Large tibia zpal</term>
<term>Largest specimens</term>
<term>Late triassic</term>
<term>Lethaia</term>
<term>Long bones</term>
<term>Marrow cavity</term>
<term>Matrix</term>
<term>Medullar</term>
<term>Medullar cavity</term>
<term>Medullar region</term>
<term>Metaphyseal region</term>
<term>Microstructure</term>
<term>Normal light</term>
<term>Opolensis</term>
<term>Ornithischian</term>
<term>Osteons</term>
<term>Outer cortex</term>
<term>Padian</term>
<term>Paleontology</term>
<term>Perimedullar</term>
<term>Perimedullar region</term>
<term>Phylogenetic</term>
<term>Phylogenetic relationships</term>
<term>Primary canals</term>
<term>Primary osteons</term>
<term>Remodelling</term>
<term>Reversal line</term>
<term>Ricqles</term>
<term>Sacral</term>
<term>Secondary osteons</term>
<term>Silesaurus</term>
<term>Silesaurus opolensis</term>
<term>Silesaurus opolensis dzik</term>
<term>Silesaurus opolensis lethaia</term>
<term>Small dinosaurs</term>
<term>Specimen zpal</term>
<term>Specimens zpal</term>
<term>Sulej</term>
<term>Suture</term>
<term>Systematic palaeontology</term>
<term>Thin sections</term>
<term>Tibia</term>
<term>Trabecula</term>
<term>Transition zone</term>
<term>Triassic</term>
<term>Vascular canals</term>
<term>Vascularization</term>
<term>Vascularized</term>
<term>Vertebra</term>
<term>Vertebral column</term>
<term>Vertebrate</term>
<term>Vertebrate paleontology</term>
<term>Victorian hypsilophodontid</term>
<term>Zpal</term>
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<term>Archosauria</term>
<term>Archosaurian groups</term>
<term>Avascular</term>
<term>Avascular transition zone</term>
<term>Bone deposition</term>
<term>Bone drift</term>
<term>Bone histology</term>
<term>Bone microstructure</term>
<term>Bone tissue</term>
<term>Bres</term>
<term>California press</term>
<term>Canal</term>
<term>Cancellous</term>
<term>Cancellous bone</term>
<term>Caudal vertebrae</term>
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<term>Circumferential layer</term>
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<term>Dinosaur</term>
<term>Dinosauria</term>
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<term>Dzik sulej</term>
<term>Endosteal</term>
<term>Erosion cavities</term>
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<term>Femur zpal</term>
<term>Growth rate</term>
<term>Growth rates</term>
<term>Haversian remodelling</term>
<term>Histology</term>
<term>Horner</term>
<term>Internal circumferential layer</term>
<term>Internal cortex</term>
<term>Irmis</term>
<term>Lacuna</term>
<term>Lamellar</term>
<term>Langer benton</term>
<term>Large tibia zpal</term>
<term>Largest specimens</term>
<term>Late triassic</term>
<term>Lethaia</term>
<term>Long bones</term>
<term>Marrow cavity</term>
<term>Matrix</term>
<term>Medullar</term>
<term>Medullar cavity</term>
<term>Medullar region</term>
<term>Metaphyseal region</term>
<term>Microstructure</term>
<term>Normal light</term>
<term>Opolensis</term>
<term>Ornithischian</term>
<term>Osteons</term>
<term>Outer cortex</term>
<term>Padian</term>
<term>Paleontology</term>
<term>Perimedullar</term>
<term>Perimedullar region</term>
<term>Phylogenetic</term>
<term>Phylogenetic relationships</term>
<term>Primary canals</term>
<term>Primary osteons</term>
<term>Remodelling</term>
<term>Reversal line</term>
<term>Ricqles</term>
<term>Sacral</term>
<term>Secondary osteons</term>
<term>Silesaurus</term>
<term>Silesaurus opolensis</term>
<term>Silesaurus opolensis dzik</term>
<term>Silesaurus opolensis lethaia</term>
<term>Small dinosaurs</term>
<term>Specimen zpal</term>
<term>Specimens zpal</term>
<term>Sulej</term>
<term>Suture</term>
<term>Systematic palaeontology</term>
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<term>Tibia</term>
<term>Trabecula</term>
<term>Transition zone</term>
<term>Triassic</term>
<term>Vascular canals</term>
<term>Vascularization</term>
<term>Vascularized</term>
<term>Vertebra</term>
<term>Vertebral column</term>
<term>Vertebrate</term>
<term>Vertebrate paleontology</term>
<term>Victorian hypsilophodontid</term>
<term>Zpal</term>
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<front><div type="abstract" xml:lang="en">Fostowicz‐Frelik, Ł. & Sulej, T. 2009: Bone histology of Silesaurus opolensisDzik, 2003 from the Late Triassic of Poland. Lethaia, Vol. 43, pp. 137–148. The phylogenetic relationships of Silesaurus opolensis have been the subject of intense debate since its discovery. Silesaurus possesses some features characteristic of ornithischian dinosaurs, such as the presence of a beak at the front of the lower jaw, yet it lacks a number of important femoral and dental synapomorphies of Dinosauria. The microstructure of the long bones (femur, tibia and metatarsal) and ribs of this species reveals a relatively intensive rate of growth, comparable with that seen in small dinosaurs and the gracile crocodylomorph Terrestrisuchus. Cortical bone formed mainly by periosteal tissue with fibro‐lamellar matrix (in older specimens parallel fibred) shows very little secondary remodelling and only in one specimen (large tibia ZPAL Ab III/1885) few lines of arrested growth are present in the outermost cortex. The vascularization is relatively dense, mainly longitudinal and ceases towards the periphery, forming almost avascular parallel fibred bone at the bone surface. This indicates maturation and significant decrease in the growth ratio in mature specimens of S. opolensis. The delicate trabeculae exhibit cores formed by the primary cancellous tissue lined with lamellar endosteal bone. The rather intense growth of S. opolensis implies a relatively high metabolic rate. Moreover, evidence from the fibro‐lamellar tissue, predominant in the cortex, suggests that this kind of rapid bone deposition could be more typical of Archosauria than previously assumed, a prerequisite for the evolution of the very fast growth rates observed in large ornithischians, sauropods and large theropods. □Archosauria, Bone histology, Dinosauriformes, Late Triassic, Silesaurus opolensis.</div>
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