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| Registros recuperados: 14 | |
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| CARNEIRO,LEONARDO M.. |
| Abstract The Protodidelphidae was a group of marsupials that lived in Gondwana from the early to middle Eocene. Among South American faunas, the Itaboraí Basin calls attention by the presence of four genera and six species. Herein is described Bergqvistherium primigenia gen. et sp. nov., a new protodidelphid from the Itaboraí Basin - lower Eocene. This taxon differs from other protodidelphids in the smaller size, developed entocristid, less brachyo-bunoid adaptations, and entoconid more mesial than the hypoconid. These characters are recovered as plesiomorphies of the Protodidelphidae, supporting Bergqvistherium as an early-divergent lineage of this group. The Protodidelphidae fauna of the Itaboraí Basin is represented by less specialized “basal” taxa,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Metatheria; Paleogene; Systematics; Teeth. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400507 |
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| Paiva Neto,A.O.; Leite,C.T.; Duarte,C.A.; Dias,D.P.M.; Döwich,G.; Queiroz Neto,A.; Lacerda Neto,J.C.. |
| ABSTRACT The aim of this study was to evaluate through three-dimensional kinematic analysis the influence of occlusal adjustment by tooth wear in masticatory biomechanics of horses. Seven clinically healthy thoroughbred Arabian horses with strong occlusal irregularities were used, of which seven castrated males and one female of between seven and nineteen years of age. Three digital video cameras and seven spherical reflective markers placed on the horses’ face were employed. The animals were filmed twice in succession: while chewing hay before and after the occlusal adjustment by tooth wear. Following that, kinematic analysis was made of the movements obtained by means of the images which were synchronized, segmented and reconstructed three-dimensionally... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kinematics; Teeth; Chewing; Occlusion; Dentistry. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352018000100006 |
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| Herman, J.; Hovestadt-Euler, M.; Hovestadt, D.C.; Stehmann, M.. |
| Part B, Nos. 1a and 1b of this series, comprising of the Batomorphii the first and the second sections on the Rajoidei, is continued with the last group of rajoid taxa as far as material was available. The tooth morphology of representatives of eleven more genera and subgenera, namely <i>Arhynchobatis, Bathyraja richardsoni-type, Cruriraja, Irolita, Notoraja, Pavoraja (Insentiraja), Pavoraja (Pavoraja), Pseudoraja, Raja (Atlantoraja), Raja (Okamejei)</i> and <i>Rhinoraja</i>, is described and illustrated by SEM-photographs. Differential diagnoses and systematic interpretations are presented as a result of the odontological examinations described here and in the previous two issues 1a and 1b for the supraspefic taxa of the Rajoidei. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Functional morphology; Marine fish; Taxonomy; Teeth; Rajiformes. |
| Ano: 1996 |
URL: http://www.vliz.be/imisdocs/publications/294448.pdf |
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| Herman, J.; Hovestadt-Euler, M.; Hovestadt, D.C.. |
| The teeth of nearly all supraspecific taxa of squaliformes are described and illustrated by SEM photos. The tooth morphology allows a direct assignment to all these taxa and some proposals of taxonomic adjustments. The results support opinions of other authors, that Echinorhinidae represent a separate order, Oxynotidae coincide odontologically with Squalidae; Squalid genera could be grouped into 8 subfamilies, 4 of which could not be defined hitherto; <i>Centroselachus</i> Garman, 1913 is confirmed and should be revalidated; significant odontological differences do not exist between <i>Cirrhigaleus</i> and <i>Squalus, Lepidorhinus</i> and <i>Centrophorus, Scymnodon</i> and <i>Scymnodalatias</i>,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Animal morphology; Identification keys; Teeth; Squalidae [Dogfish sharks]. |
| Ano: 1989 |
URL: http://www.vliz.be/imisdocs/publications/294441.pdf |
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| Díaz-M., J.M.. |
| Las mandíbulas secas de cuatro especies de tiburones carcharh inicios (Galeozerdo cuvieri, Carcharhinus albimarginatus, C. galapaguensis y C. porosus) del Pacífico oriental tropical fueron examinadas para determinar las tasas de remplazo dental de cada especie. En general, las tasas de remplazo fueron mayores en la mandíbula inferior que en la superior, y esta diferencia fue más grande en aquellas especies en las que la diferenciación morfológica entre los dientes superiores e inferiores es más notable. Además, las mandíbulas cuyos dientes tienden a ser más anchos que largos tienen tasas de remplazo menores que aquellas cuyos dientes tienden a ser más largos que anchos. Esto es debido posiblemente a la mayor capacidad de tensión de los dientes anchos y a... |
| Tipo: Journal Contribution |
Palavras-chave: Marine fish; Teeth; Teeth; Http://aims.fao.org/aos/agrovoc/c_7650. |
| Ano: 1979 |
URL: http://hdl.handle.net/1834/3949 |
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| Freudenthal, M.; Martín-Suárez, E.. |
| We present estimates for head and body length (HBL) of fossil rodents. We assembled HBL data and tooth row length data (LTR, UTR) for a large number of extant rodents, and calculated regression lines of HBL on LTR and UTR for all rodents together (all-rodents equation), and for separate taxonomic groups (family equations). In fossil rodents, data for complete tooth rows are scarce, therefore we use the sum of the lengths of the teeth (LRsum, URsum) as a surrogate for tooth row length. The relation between this parameter and real tooth row length (LTR, UTR) is calculated on the basis of a number of populations for which both parameters are available. We estimate HBL of fossil rodents, using LRsum and URsum and the regression lines of extant rodents, and we... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Rodentia; Body mass; Teeth; Tooth row length. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/607530 |
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| Noldus, L.P.J.J.; Klerk, R.J.J. De. |
| This study of the Harbour Porpoise Phocoena phocoena (Linnaeus, 1758) has been undertaken in order to find out whether differences in size and growth rate between the skulls of males and females could be demonstrated. Stuart & Morejohn (1980) have established this phenomenon in the population of the north-eastern Pacific. The material on which this study is based, consists of 76 skulls present in the collection of the Rijksmuseum van Natuurlijke Historie (RMNH), Leiden. They all belong to specimens stranded on the Dutch coast. In order to determine the age, of all these specimens the number of dentinal growth layer groups (GLG) in the teeth was counted. Thereupon 32 cranial characters were measured of each skull; these measurements were plotted against... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Mammalia; Cetacea; Phocoenidae; Phocoena phocoena; North Sea; Skull; Growth; Teeth; Age determination; 42.84. |
| Ano: 1984 |
URL: http://www.repository.naturalis.nl/record/319036 |
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| Campos-da-Paz,Ricardo. |
| Recent study of the type-material of Tembeassu marauna, a poorly-known species currently represented in collections only by its holotype (male) and paratypes (male and female), all collected forty years ago at the Ilha Solteira reservoir area, upper Paraná river region, revealed an unique pattern of dental arrangement among members of the order Gymnotiformes. This autapomorphic condition refers to a patch of around 15 elongate conical, extra teeth associated to soft tissue, and disposed inside the mouth on a restricted area at the roof of oral cavity and located just in front of the premaxillary bones (although clearly apart from those). Besides this obvious feature, two additional conditions are recognized as possibly unique for T. marauna, which refer to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apteronotus; Gymnotiforms; Mouth; Osteology; Teeth; Upper Paraná. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000300007 |
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| Perry,Jonathan M. G.; Kay,Richard F.; Vizcaíno,Sergio F.; Bargo,M. Susana. |
| Inferences about the diet of Miocene platyrrhine monkeys have relied upon the morphology of the molar teeth, specifically the crests on the molars. Using a library of Micro-CT images of a broad comparative sample of living platyrrhines (callitrichines, cebines, pitheciids and atelids), late early Miocene Homunculus, and the early Miocene Tremacebus and Dolichocebus, we extend these inferences by examining the surface areas of the tooth roots, anchor points for the periodontal ligaments. From muscle scars on the skull, we estimate the mechanical leverage of the chewing muscles at bite points from the canine to the last molar. Extant platyrrhines that gouge bark to obtain exudates do not have especially large canine roots or anterior premolar roots compared... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Primates; Platyrrhini; Homunculus; Miocene; Teeth; Diet. |
| Ano: 2010 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142010000300007 |
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| Registros recuperados: 14 | |
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