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Hyperdontia: Exploring the developmental abnormality

100%

Arandi N. Z.

Journal of Pre-Clinical and Clinical Research

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2020

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tom 14

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nr 4

2

Dental anomalies in the gray fox Urocyon cinereoargenteus and the fox Vulpes vulpes

86%

Gisburne T. J., Feldhamer G. A.

Acta Theriologica

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2005

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tom 50

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nr 4

515-520

We examined dental anomalies, including oligodonty, polydonty, connation, rotation, and misalignment in 510 gray foxes and 150 red foxes from southern Illinois (USA). Dental anomalies were significantly more common (x 2 = 11.5, df = 1,p < 0.001) in gray foxes (n = 177; 34.7% of sample) than red foxes (n = 25; 16.6% of sample), and more common in male than female gray foxes (x 2 = 3.88, df = 1,p < 0.05). Polydonty was very uncommon, as expected for species in which the normal dental complement is close to the primitive eutherian number. In both species, the most prevalent anomaly was loss of the last lower molar. Loss of the upper or lower first premolar was also common. Thus, oligodonty almost always involved the smaller anterior (P1 and P1) or posterior (M3) teeth of the dental arcade. Conversely, the large carnassial teeth, with complex occlusal patterns and shearing surfaces, appeared to be highly conserved with only three anomalous individuals (0.4%) among all specimens.

3

Dental anomalies in wild and domestic Sus scrofa in Illinois

86%

Feldhamer G. A., McCann B. E.

Acta Theriologica

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2004

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tom 49

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nr 1

The cleaned skulls of 39 wild and 30 domestic pigs from southern Illinois (USA) were assessed for dental anomalies including polydonty, oligodonty, misalignment, and rotation. Dental anomalies occurred in 16 wild and 15 domestic pigs. Oligodonty (either bilateral or unilateral) was the most common anomaly, occurring in 9 wild (23.1% of the sample) and 15 (50%) domestic pigs. In 22 of the 24 individuals exhibiting oligodonty, this anomaly involved the lower first premolar (P1. Given the placement of P1, oligodonty may reflect a trend toward reduction of the dental arcade from the primitive eutherian number. Domesticated species are reported to have more anomalies than wild counterparts because of inbreeding. We found no difference in the number of dental anomalies between domestic and wild pigs.

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A morganucodontan mammalia form from the Upper Jurassic Morrison Formation, Utah, USA

72%

Davis B. M., Jager K. R. K., Rougier G. W., Trujillo K., Chamberlain K.

Acta Palaeontologica Polonica

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2022

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tom 67

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nr 1

5

Dentition and relationships of the Jurassic mammal Shuotherium

72%

Kielan-Jaworowska Z., Cifelli R. L., Luo Z.

Acta Palaeontologica Polonica

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2002

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tom 47

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nr 3

The Middle Jurassic mammal Shuotherium has lower molars that possess a trigonid and talonid, but are unique in having the talonid situated in front of the trigonid, rather than behind it, as in molars of usual tribosphenic pattern. Shuotherium dongi Chow and Rich, 1982 was based on a dentary bearing seven teeth, originally interpreted as three premolars and four molars. Based on comparison with other groups of early mammals, we reinterpret the premolar–molar boundary in the holotype of S. dongi, and propose a dental formula of four (or more) premolars and three molars. The ultimate lower premolar (previously identified as the first molar) has a completely developed trigonid and no talonid or pseudo−talonid. We hypothesize that the mesial cingulid on molars of Australosphenida is a highly plausible structural antecedent to the pseudo−talonid of Shuotherium. This and other shared, derived features support a relationship of Shuotherium and Australosphenida as sister−taxa. We hypothesize that the common ancestor of Shuotherium + Australosphenida had a global distribution no younger than early Middle Jurassic, and that the respective clades diverged prior to full separation of Gondwanan and Laurasian landmasses.

6

New data on the dentition of the scincomorphan lizard Polyglyphanodon sternbergi

72%

Nydam R. L., Cifelli R. L.

Acta Palaeontologica Polonica

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2005

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tom 50

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nr 1

Polyglyphanodon sternbergi Gilmore, 1940 is a large−bodied lizard from the Late Cretaceous of North America distinguished by its transversely oriented, interlocking teeth. Initially the teeth of P. sternbergi were described as smooth and blade−like, but recent discoveries of new specimens from the type locality and re−examination of the original material indicate that the chisel−like teeth of P. sternbergi have small, irregular serrations along the blades. These serrations are similar in size to those found on the teeth of the modern herbivorous lizard Iguana iguana and were likely used in a similar manner to crop vegetation, but was also capable of a degree of oral food processing due to the transverse orientation and interlocking arrangement of the dentition of P. sternbergi. Additionally, the presence of transversely oriented teeth with V−shaped blades in the anterior portion of the tooth row of P. sternbergi represents an additional shared characteristic in tooth structure between P. sternbergi and Dicothodon moorensis, Bicuspidon numerosus, and Peneteius aquilonoius; all transversely−tooth polyglyphandontine lizards from the Cretaceous of North America. It appears that the unique dentitions of Polyglyphanodon sternbergi (large teeth with transverse, serrated blades) and Peneteius aquilonius (small teeth with mammal−like specializations) present by the end of the Cretaceous were derived from a bicuspid, transversely oriented precursor tooth with a V−shaped blade.

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Evaluation of dental health in mill workers. Part I. The state of dentition

72%

Bachanek T., Pawlowicz A., Tarczydlo B., Chalas R.

Annals of Agricultural and Environmental Medicine

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2001

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tom 08

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nr 1

8

New features of the snout and orbit of a therocephalian therapsid from South Africa

72%

Sigurdsen T.

Acta Palaeontologica Polonica

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2006

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tom 51

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nr 1

I describe the anterior part of the externally poorly preserved skull of a therocephalian from the Karoo Basin in South Africa, using the method of serial grinding. The skull is incomplete, and its estimated length in life is 130 mm. The skull can be assigned to the Akidnognathidae with some confidence. The stratigraphic age of the specimen and its locality are not known, but the surrounding sediment suggests that it may be from the Upper Permian Dicynodon Assemblage Zone. It has five or six postcanine teeth, and a poorly developed crista choanalis. The sinuses and canals of the snout are recognized, and it is believed that the sinus positioned posteriorly in the snout (posterior maxillary sinus) is homologous with the maxillary sinus of anomodonts and cynodonts. It also shows similarities to the infraorbital canal of early mammals, such as Morganucodon. An anteriorly positioned sinus (anterior maxillary sinus), situated directly behind the canine root, is homologized with the maxillary sinus of gorgonopsians. In addition, I identify the previously undescribed canal (designated anterior maxillary canal), leading from the anterior maxillary sinus antero−dorsally. No evidence for maxilloturbinals was found in contrast to the condition known in the primitive therocephalian Glanosuchus

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Żywienie a próchnica zębów. Cz. II. Wyniki badań histologicznych uzębienia szczurów białych z doświadczalną próchnicą

58%

Opuszynska T., Obersztyn A., Szczygiel A.

Roczniki Państwowego Zakładu Higieny

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1962

|

tom 13

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nr 1

10

Wpływ rodzaju podawanych tłuszczów na występowanie zmian w zębach i przyzębiu szczurów

58%

Wysocki E., Ziombski H.

Roczniki Państwowego Zakładu Higieny

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1963

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tom 14

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nr 4

11

First Mesozoic record of the stingray Myliobatis wurnoensis from Mali and a phylogenetic analysis of Myliobatidae incorporating dental characters

58%

Claeson K. M., O'Leary M. A., Roberts E. M., Sissoko F., Bouare M., Tapanila L., Goodwin D., Gottfried M. D.

Acta Palaeontologica Polonica

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2010

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tom 55

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nr 4

New specimens, including the first record of lower dental plates, of the extinct myliobatid Myliobatis wurnoensis were recovered from the Maastrichtian (Late Cretaceous) of the Iullemmeden Basin, Mali, and are the oldest record of the taxon. We evaluated the phylogenetic position of this taxon with reference to other myliobatids (extinct and extant) using osteology and dentition. Our results indicate that Myliobatinae and Myliobatis are each paraphyletic, and that Aetobatus and Rhinoptera are monophyletic. We also found that taxa known only from the Cretaceous, Brachyrhizodus and Igdabatis, are highly nested within Myliobatidae. The phylogenetic position of these taxa unambiguously extends the origin of Myliobatidae and most of its representative taxa into the Mesozoic.

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Vertebral morphology, dentition, age, growth, and ecology of the large lamniform shark Cardabiodon ricki

58%

Newbrey M. G., Siversson M., Cook T. D., Fotheringham A. M., Sanchez R. L.

Acta Palaeontologica Polonica

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2015

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tom 60

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nr 4

Cardabiodon ricki and Cardabiodon venator were large lamniform sharks with a patchy but global distribution in the Cenomanian and Turonian. Their teeth are generally rare and skeletal elements are less common. The centra of Cardabiodon ricki can be distinguished from those of other lamniforms by their unique combination of characteristics: medium length, round articulating outline with a very thick corpus calcareum, a corpus calcareum with a laterally flat rim, robust radial lamellae, thick radial lamellae that occur in low density, concentric lamellae absent, small circular or subovate pores concentrated next to each corpus calcareum, and papillose circular ridges on the surface of the corpus calcareum. The large diameter and robustness of the centra of two examined specimens suggest that Cardabiodon was large, had a rigid vertebral column, and was a fast swimmer. The sectioned corpora calcarea show both individuals deposited 13 bands (assumed to represent annual increments) after the birth ring. The identification of the birth ring is supported in the holotype of Cardabiodon ricki as the back-calculated tooth size at age 0 is nearly equal to the size of the smallest known isolated tooth of this species. The birth ring size (5-6.6 mm radial distance [RD]) overlaps with that of Archaeolamna kopingensis (5.4 mm RD) and the range of variation of Cretoxyrhina mantelli (6-11.6 mm RD) from the Smoky Hill Chalk, Niobrara Formation. The revised, reconstructed lower jaw dentition of the holotype of Cardabiodon ricki contains four anterior and 12 lateroposterior files. Total body length is estimated at 5.5 m based on 746 mm lower jaw bite circumference reconstructed from associated teeth of the holotype.

13

The teeth of the unenlagiine theropod Buitreraptor from the Cretaceous of Patagonia, Argentina, and the unusual dentition of the Gondwanan dromaeosaurids

58%

Gianechini F. A., Makovicky P. J., Apesteguia S.

Acta Palaeontologica Polonica

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2011

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tom 56

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nr 2

The Unenlagiinae is a clade of Gondwanan dromaeosaurid theropods mainly known from incomplete skeletal material. The group includes two recently discovered theropods, Buitreraptor and Austroraptor, from which cranial remains are available with in situ maxillary and dentary teeth, thus allowing the study of tooth morphology. Among the derived traits that diagnose the dentition of unenlagiines are: (i) high tooth count, (ii) small size of individual teeth when compared with skull height, (iii) absence of denticles and carinae, and (iv) presence of longitudinal grooves on the tooth crown. This suite of dental characteristics, shared between Buitreraptor and Austroraptor, can be considered as diagnostic of the Unenlagiinae or, at least, a more exclusive clade within the group. The teeth of Buitreraptor exhibit a remarkable labiolingual compression, whereas Austroraptor possesses more conical teeth, probably respective autapomorphic features. On one hand, these dental morphologies differ from those observed in most Laurasian dromaeosaurids and, for instance, could be considered as further proof of the purported vicariant evolution of the lineage on the southern continents. On the other hand, the morphological similarities (e.g., absence of denticles) between the teeth of unenlagiines and other theropod lineages, including Mesozoic birds and ornithomimosaurs, can be considered as the result of parallel trends related to dental reduction.

14

New teeth of allotherian mammals from the English Bathonian, including the earliest multituberculates

58%

Butler P. M., Hooker J. J.

Acta Palaeontologica Polonica

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2005

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tom 50

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nr 2

Twenty one isolated multituberculate−like teeth are described from the Forest Marble (late Bathonian) of Oxfordshire and Dorset, England. Eighteen are additional to the teeth described as Eleutherodon oxfordensis by Kermack et al. (1998), and three of those are placed in new taxa. Six new molars of Eleutherodon provide further information on variation in size, proportion and root pattern. Millsodon superstes gen. et sp. nov. (family indeterminate), based on first and last lower molars and a referred upper molar, has resemblances to Haramiyidae and Theroteinidae. Kirtlingtonia catenata gen. et sp. nov. (family indeterminate), based on last upper molars and a probable upper premolar, has a slight resemblance to Eleutherodon, and also to M2 of some paulchoffatiid multituberculates. Kermackodon multicuspis gen. et sp. nov. (family Kermackodontidae nov.) and Hahnotherium antiquum gen. et sp. nov. (family Hahnotheriidae nov.) are based on second upper molars, recognised as multituberculate by their horizontal wear and inferred occlusal displacement with respect to m2. A lower molar referred to H. antiquum confirms this. A blade−like lower premolar and an upper premolar with conical cusps, referred to Kermackodon, are multituberculate−like, but distinctive. Divergence between the two Bathonian multituberculates indicates that the order originated much earlier, more probably from a haramiyid than from a morganucodontid source. Mojo is regarded as probably a haramiyid. The Hahnodontidae, which have basined wear, are removed from the Multituberculata to the “Haramiyida”.

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Kielantherium, a basal tribosphenic mammal from the Early Cretaceous of Mongolia, with new data on the aegialodontian dentition

58%

Lopatin A., Averianov A.

Acta Palaeontologica Polonica

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2007

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tom 52

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nr 3

Two additional specimens of the basal tribosphenid mammal Kielantherium gobiense, the first known aegialodont upper molar (possibly M2) and a dentary fragment with m1, are described from the Early Cretaceous Höövör locality in Mongolia. The upper molar shows an initial stage of the protocone development. Kielantherium gobiense has been known from two specimens only, and thus the new material doubles the hypodigm of this species. Kielantherium is clearly not a junior synonym of Aegialodon, as it differs from the latter in having a cusp−like mesiolabial cingulid cuspule f rather than prominent ridge−like precingulid. Kielantherium's lower postcanine dental formula (with four or more premolars and four molars) is distinctive and more primitive than in Peramus and Eutheria which have five premolars and three molars, and Metatheria which have three premolars and four molars.

16

Cement furrows in the dentition of Mammuthus primigenius and the question of their etiology

58%

Niven L. B., Wojtal P.

Acta Zoologica Cracoviensia

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2002

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tom 45

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nr 2

Linear furrows have been documented in the crown cement of Mammuthus primigenius molars from the late Pleistocene archaeological sites of Kraków Spadzista Street (B), Poland and Vogelherd, Germany. The high frequency of cement defects on these assemblages, 50% and 74% of the molars respectively, and on other fossil proboscidean teeth from Eurasia warrants investigation into their etiology. One possible cause of the furrows is a developmental defect such as hypoplasia, due to periodic physiological stress; such a causal factor could have broad implications for the life history of woolly mammoths. Other potential origins of the furrows include cement decay from infection or impaction of material in the gums and resorption of tooth cement. Apart from cause, the morphology of the cement furrows reflects regular rhythms of seasonal or annual formation.

17

First evidence of a neonate dentition in pareiasaurs from the Upper Permian of Russia

58%

Kordikova E. G., Khlyupin A. J.

Acta Palaeontologica Polonica

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2001

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tom 46

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nr 4

Finds of juvenile parareptiles are rare in the fossil record. We describe partial upper dentition with large vacuities between bones belonging to a neonate pareiasaur (preserved skull fragment is 22.4 mm long). The specimen was collected within 5 m from a skeleton of an adult specimen of Deltavjatia vjatkensis (Hartmann-Weinberg, 1937) (Pareiasauridae) from red calcareous mudstones in the upper part of the Vanyushonkov Member of Ursulov Formation (Upper Permian, Upper Tatarian substage, Vishkil'skiy regional stage) of Kotel'nich locality, Vyatka River region, Russia. Referral to Deltavjatia vjatkensis is based on the presence of heterodont dentition: spatulate maxillary, triconodont vomerine and conical, palatine and pterygoid teeth located on well-developed palate ridges. This is the first positively identified record of the neonate pareiasaur dentition.

18

A small camelid Hemiauchenia from the Late Pleistocene of Hidalgo, central Mexico

51%

Bravo-Cuevas V. M., Jimenez-Hidalgo E., Cuevas-Ruiz G. E., Cabral-Perdomo M. A.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 3

Pleistocene camels from Mexico include representatives of llamas and camels. Their record spans from the Early Blancan to the Late Pleistocene, based on several localities in the northern, northwestern and central parts of the country, with members of the genus Hemiauchenia being particularly well represented. New specimens of a small llama, collected in the state of Hidalgo, central Mexico, are assigned to Hemiauchenia gracilis owing to a combination of cranial and postcranial characters, including a short upper premolar−molar series, the presence of a two−rooted P3, molars covered by a thin layer of cementum, U−shaped molar crescents, well−developed styles and ribs, a small degree of crenulation, a relatively short lower tooth row, the lack of p1 and p3, weakly developed anteroexternal stylids, a shallow and slender mandible, and long and slender metatarsals and phalanges. The material described here extends the Pleistocene geographic distribution of H. gracilisfrom northern to central Mexico, and its biochronological range from the Early Blancan to the Late Pleistocene (Rancholabrean), thus making it the southernmost record and the geochronologically youngest occurrence of this species in North America. The mesowear pattern of the material from Hidalgo suggests that these animals were mainly browsers. Their estimated body mass resembles that of Blancan specimens from Guanajuato, implying that this species maintained approximately the same body mass throughout its biochronological range in central Mexico.

19

Żywienie a próchnica zębów. V. Wpływ uzupełniania niedoborowej diety próchniczo-twórczej w witaminy A, D, E oraz białko i wapń na rozwój zmian w układzie kostnym i uzębieniu szczurów białych

44%

Szczygiel A., Kossakowska M.

Roczniki Państwowego Zakładu Higieny

|

1963

|

tom 14

|

nr 1

20

Ocena stanu odżywienia dzieci w jednej ze szkół podstawowych w województwie poznańskim

44%

Szczygiel A., Simbierowicz Z., Konieczna W., Pudlik-Pankiewicz K., Ksiezny S., Dietl B.

Roczniki Państwowego Zakładu Higieny

|

1962

|

tom 13

|

nr 4

Ograniczanie wyników

Hyperdontia: Exploring the developmental abnormality

Dental anomalies in the gray fox Urocyon cinereoargenteus and the fox Vulpes vulpes

Dental anomalies in wild and domestic Sus scrofa in Illinois

A morganucodontan mammalia form from the Upper Jurassic Morrison Formation, Utah, USA

Dentition and relationships of the Jurassic mammal Shuotherium

New data on the dentition of the scincomorphan lizard Polyglyphanodon sternbergi

Evaluation of dental health in mill workers. Part I. The state of dentition

New features of the snout and orbit of a therocephalian therapsid from South Africa

Żywienie a próchnica zębów. Cz. II. Wyniki badań histologicznych uzębienia szczurów białych z doświadczalną próchnicą

Wpływ rodzaju podawanych tłuszczów na występowanie zmian w zębach i przyzębiu szczurów

First Mesozoic record of the stingray Myliobatis wurnoensis from Mali and a phylogenetic analysis of Myliobatidae incorporating dental characters

Vertebral morphology, dentition, age, growth, and ecology of the large lamniform shark Cardabiodon ricki

The teeth of the unenlagiine theropod Buitreraptor from the Cretaceous of Patagonia, Argentina, and the unusual dentition of the Gondwanan dromaeosaurids

New teeth of allotherian mammals from the English Bathonian, including the earliest multituberculates

Kielantherium, a basal tribosphenic mammal from the Early Cretaceous of Mongolia, with new data on the aegialodontian dentition

Cement furrows in the dentition of Mammuthus primigenius and the question of their etiology

First evidence of a neonate dentition in pareiasaurs from the Upper Permian of Russia

A small camelid Hemiauchenia from the Late Pleistocene of Hidalgo, central Mexico

Żywienie a próchnica zębów. V. Wpływ uzupełniania niedoborowej diety próchniczo-twórczej w witaminy A, D, E oraz białko i wapń na rozwój zmian w układzie kostnym i uzębieniu szczurów białych

Ocena stanu odżywienia dzieci w jednej ze szkół podstawowych w województwie poznańskim