Unique growth pattern of Metoposaurus diagnosticus krasiejowensis (Amphibia, Temnospondyli) from the Upper Triassic of Krasiejów, Poland

Konietzko-Meier, Dorota; Klein, Nicole

doi:10.1016/j.palaeo.2012.12.003

Cited by 54 publications

(90 citation statements)

References 30 publications

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“…This also applies in temnospondyls (Damiani, 2000; Steyer et al, 2004; Ray, Mukherjee & Bandyopadhyay, 2009; Mukherjee, Ray & Sengupta, 2010; Sanchez et al, 2010a; Sanchez et al, 2010b; Konietzko-Meier & Klein, 2013; Konietzko-Meier & Sander, 2013; Konietzko-Meier & Schmitt, 2013; Sanchez & Schoch, 2013; Konietzko-Meier, Danto & Gądek, 2014). In the long bones, the three main types of growth marks are known: fast growing zones, more slowly deposited annuli, and Lines of Arrested Growth (LAG-s) that indicate the cessation of the growth (Francillon-Vieillot et al, 1990).…”

Section: Discussionmentioning

confidence: 97%

“…Histology of the long bones in Metoposaurus krasiejowensis is well known (Konietzko-Meier & Klein, 2013; Konietzko-Meier & Sander, 2013), and an evaluation and correlation of the growth patterns preserved in long bones and dermal bones is possible. Indirect estimation of the individual age of the studied skull is possible based on the morphological characters and size-comparison with the femora.…”

Section: Discussionmentioning

confidence: 99%

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Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

Gruntmejer

Konietzko-Meier

Bodzioch

2016

PeerJ

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In this study, 21 skull bones of Metoposaurus krasiejowensis from the Late Triassic of Poland were investigated histologically. Dermal bones show a diploë structure, with an ornamented external surface. The ridges consist of mostly well vascularized parallel-fibered bone; the valleys are built of an avascular layer of lamellar bone. The thick middle region consists of cancellous bone, with varying porosity. The thin and less vascularized internal cortex consists of parallel-fibered bone. The numerous Sharpey’s fibers and ISF are present in all bones. The cyclicity of growth is manifested as an alternation of thick, avascular annuli and high vascularized zones as well as a sequence of resting lines. The detailed histological framework of dermal bones varies even within a single bone; this seems to be related to the local biomechanical loading of the particular part of the skull. The dynamic processes observed during the ornamentation creation indicate that the positions of the ridges and grooves change during growth and could be a specific adaptation to changing biomechanical conditions and stress distribution during bone development. In the supratemporal, the cementing lines show that the remodeling process could be involved in the creations of sculpture. The common occurrence of ISF suggests that metaplastic ossification plays an important role during cranial development. Endochondral bones preserved the numerous remains of calcified cartilage. This indicates that ossification follows a pattern known for stereospondyl intercentra, with relatively slow ossification of the trabecular part and late development of the periosteal cortex. The large accumulation of Sharpey’s fibers in the occipital condyles indicates the presence of strong muscles and ligaments connecting the skull to the vertebral column.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

Gruntmejer

Konietzko-Meier

Bodzioch

2016

PeerJ

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“…Konietzko-Meier and Klein (2013) showed that the bone microstructure is highly variable within millimeters of the sampled region. The histological midshaft with the neutral zone (the area where growth started) is more locally restricted in plesiomorphic tetrapod long bones than the morphological midshaft.…”

Section: The Origin Of the Variabilitymentioning

confidence: 99%

“…Previously sampled anamniotic tetrapods that best demonstrate intraspecific histological variability are Dutuitosaurus ouazzoui (Steyer et al, 2004), Metoposaurus diagnosticus from Poland (Konietzko-Meier and Klein, 2013;Konietzko-Meier and Sander, 2013) and Gerrothorax pulcherrimus (Sanchez and Schoch, 2013).…”

Section: The Origin Of the Variabilitymentioning

confidence: 99%

The discrepancy between morphological and microanatomical patterns of anamniotic stegocephalian postcrania from the Early Permian Briar Creek Bonebed (Texas)

Konietzko-Meier

Shelton

Sander

2016

Comptes Rendus Palevol

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a b s t r a c tThe histological framework of thirteen Early Permian tetrapod long bones from a single locality, the Briar Creek Bonebed in Archer County, Texas, USA, is described from a series of transverse sections through the midshafts. The bones were morphologically categorized and belong to one of three taxa: Eryops, Archeria, and Diadectes. However, five histotypes are recognized. The first category includes the juvenile bone. The second histotype is characterized by the presence of radial vascular canals. The third histotype is characterized by the numerous longitudinal canals arranged in regular rows. In the fourth histotype, there is strong remodeling in the deep part of the cortex, creating a distinct border with the external layer of lamellar bone. In the fifth histotype, the deep part of the cortex is progressively remodeled towards osteoporosis with distinct layers of large circumferentially arranged erosion cavities. For femora and humeri, histotypes match morphology. Histotype II is characteristic for Diadectes propodials, histotype III is characteristic for Eryops propodials, and histotype IV is characteristic for Archeria propodials. A discrepancy between morphology and histology is observed in the ulnae, fibula and radius. This discrepancy may be explained by interspecific or intraspecific variability.

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“…Skeletal remains of these temnospondyls are known from North America (Koskinonodon and Apachesaurus; Hunt 1993), North Africa (Dutuitosaurus ouazzoui and Arganasaurus lyazidi ;Dutuit 1976;Hunt 1993), Madagascar (Dutuit 1978), India (Phantasaurus maleriensis; Chowdhury 1965, Sengupta 1992Chakravorti and Sengupta 2016) and from Europe, including the following species: Metoposaurus diagnosticus (von Meyer 1842), Metoposaurus krasiejowensis-previously recognised as a subspecies, Metoposaurus diagnosticus krasiejowensis (see Sulej 2002), and Metoposaurus algarvensis (Brusatte et al 2015). Material of the Polish taxon Metoposaurus krasiejowensis, recovered at Krasiejów, has been examined largely osteologically and histologically (Dzik et al 2000;Sulej 2002Sulej , 2007Dzik and Sulej 2007;Konietzko-Meier and Wawro 2007;Gruntmejer 2012;Konietzko-Meier and Klein 2013;Brusatte et al 2015;Gruntmejer et al 2016;Konietzko-Meier et al 2018;Teschner et al 2018). However, quite of lot of unexplained issues surrounding the ecology and feeding of these animals remain.…”

Section: Introductionmentioning

confidence: 99%

Morphology and preliminary biomechanical interpretation of mandibular sutures in Metoposaurus krasiejowensis (Temnospondyli, Stereospondyli) from the Upper Triassic of Poland

et al. 2018

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The morphology of the mandibular sutures in the Late Triassic temnospondyl Metoposaurus krasiejowensis has been examined in order to determine their role in mandible biomechanics. Until now, no histological studies of mandibular sutures in extinct vertebrates were performed, in contrast to cranial sutures. As a consequence, mandibular suture interpretations herein are based mainly on comparisons with previous studies of cranial sutures and with 3D cranial finite element analysis of this species. A total of 32 standard thin sections were studied under standard petrographic microscope observations in order to differentiate the morphology of mandibular sutures. Five mandibular suture types are present in this taxon: interdigitated, shallowly interdigitated, overlapping, tongue and groove and abutting. Based on previous work, it has generally been assumed that the shallowly interdigitated, tongue, groove and abutting suture types are associated with tension, the interdigitated type with compression and the overlapping type with absorption and counteraction of variable loads. The sutures associated with tension occur mainly in the anterior part of the mandible, principally in the dentary; overlapping sutures have been noted in medial portions of the mandible and sutures associated with compression mainly in posterior portions, i.e., in the angular and prearticular. The variability of suture types along the mandible suggests a complex loading regime of compression and tension. Sutures associated with tension and a flexible symphysis potentially allowed an increase of oral volume during gape opening, whereas sutures associated with compression represent adaptations for strong bite forces. Keywords Temnospondyli · Metoposaurus · Mandible · Sutures · BiomechanicsResumen Se ha examinado la morfología de las suturas mandibulares del temnospóndilo del Triásico Superior Metoposaurus krasiejowensis para determinar su papel en la biomecánica mandibular. Hasta la fecha, no se han realizado estudios histológicos de las suturas mandibulares de vertebrados fósiles, en contraste con los estudios histológicos en suturas craneales. Como consecuencia, las interpretaciones sobre las suturas mandibulares están aquí basadas en la comparación con estudios previos en suturas craneales y con análisis 3D de elementos finitos para esta misma especie. En total 32 laminas delgadas estándares fueron estudiadas con observaciones de microscopio petrográfico con el fin de diferenciar la morfología de las suturas mandibulares. Cinco tipos de suturas mandibulares son presentes en este taxón: interdigitales, levemente interdigitales, superposición, lengua, ranura y lindante. En base a estudios previos, se ha asumido generalmente que las suturas levemente interdigitales, lengua, ranura y lindantes se asocian con cargas de tensión, mientras que las de tipo interdigitales se asocian con compresión y el tipo sutural de superposición con distintas cargas de absorción y neutralización. Las suturas asociadas con tensión ocurren mayormente en la parte...

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Unique growth pattern of Metoposaurus diagnosticus krasiejowensis (Amphibia, Temnospondyli) from the Upper Triassic of Krasiejów, Poland

Cited by 54 publications

References 30 publications

Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

Cranial bone histology ofMetoposaurus krasiejowensis(Amphibia, Temnospondyli) from the Late Triassic of Poland

The discrepancy between morphological and microanatomical patterns of anamniotic stegocephalian postcrania from the Early Permian Briar Creek Bonebed (Texas)

Morphology and preliminary biomechanical interpretation of mandibular sutures in Metoposaurus krasiejowensis (Temnospondyli, Stereospondyli) from the Upper Triassic of Poland

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