|
|
|
| Registros recuperados: 34 | |
|
|
| DoNascimiento,Carlos; Prada-Pedreros,Saúl; Guerrero-Kommritz,Jürgen. |
| A new Trichomycterus is described from a highland tributary of the río Meta (Orinoco basin), along the east flank of Páramo de Cruz Verde, Eastern Cordillera of Colombia. The new species is distinguished from most of its congeners by having a reduced posterior cranial fontanel, restricted to the parieto-supraoccipital, cleithrum pierced by several foramina, and an unique combination of four irregular rows of conic teeth in premaxilla and dentary, 13-14 opercular odontodes, 41-43 interopercular odontodes, 6-7 branchiostegal rays, 40 or 41 free vertebrae, 14-18 ribs, first ray of pectoral fin slightly projected as a short filament, 7-8 branched pectoral-fin rays, dorsal-fin origin at same level of pelvic-fin insertion, anal-fin origin posterior to dorsal-fin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ituglanis; Río Orinoco basin; Osteology; Trichomycterinae; Trichomycterus cachiraensis. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252014000400717 |
| |
|
|
| Rapp-Py-Daniel,Lúcia; Oliveira,Andreza S.; Bastos,Douglas A.; Ito,Priscila Madoka M.; Zuanon,Jansen; Briglia-Ferreira,Sylvio Romério. |
| ABSTRACT A new species of Paralithoxus is described from the Ajarani River, a small tributary of the Branco River basin, Roraima State, Brazilian Amazon. The genus Paralithoxus comprises species described from the Essequibo drainage in Guyana, Approuague and Maroni in French Guiana, Suriname River in Surinam, and more recently, from Jari and Amapá rivers, in Brazil. Despite occurring in a rock-bottomed fast-flowing stream as the other species of Paralithoxus, this is the first species of the genus collected at 900 m altitude, in the Serra da Mocidade highlands, an isolated and poorly accessible small mountain chain at the southern border of the Guiana Shield. The new species is distinguished from its congeners by having truncate teeth, color pattern with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Altitudinal fishes; Morphology; Osteology; Rio Branco basin; Taxonomy. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000500209 |
| |
|
| |
|
|
| Ishwarkumar,S; Pillay,P; DeGama,B. Z; Satyapal,K. S. |
| The mandibular condyle is the rounded protuberance that articulates with the mandibular fossa to form the temporomandibular joint (TMJ). The shape of the mandibular condyle may be classified according to five basic shapes viz. flattened, convex, angled, rounded and concave. Previous research indicated that variation in the shape and size of the mandibular condyle, exists and that population-specific differences may also occur. This study aimed to document the shapes and size of the mandibular condyle and determine their relationship with regard to sex, age and race (if any). The morphometric and morphological parameters of the mandibular condyle were measured and assessed in 54 dry mandible specimens (n= 108). The Wedel et al. (1978) classification scheme... |
| Tipo: Journal article |
Palavras-chave: Mandibular condyle; Mandibles; Osteology; Morphometry; Morphology. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300005 |
| |
|
|
| RIGA,BERNARDO J. GONZÁLEZ; LAMANNA,MATTHEW C.; OTERO,ALEJANDRO; DAVID,LEONARDO D. ORTIZ; KELLNER,ALEXANDER W.A.; IBIRICU,LUCIO M.. |
| Abstract: In the last two decades, the number of phylogenetically informative anatomical characters recognized in the appendicular skeleton of titanosaurian sauropod dinosaurs has increased dramatically with the discovery of new and comparatively complete specimens. Here we provide an overview of the appendicular skeletal morphology of South American titanosaurs and discuss its significance for phylogenetic reconstruction. The appendicular skeletal diversity of South American titanosaurs is substantially greater than was initially appreciated. Moreover, some regions of the appendicular skeleton, such as the pes, exhibit remarkable variability in form. Multiple synapomorphies of Titanosauria and the less inclusive clades Lithostrotia and Saltasauridae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Titanosauria; South America; Appendicular skeleton; Osteology; Phylogeny; Colossosauria. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000400514 |
| |
|
|
| Vélez-García,Juan Fernando; Duque-Parra,Jorge Eduardo; Barco-Ríos,John. |
| This document is a description of the macroscopic functional anatomy of the ulna bony prominences in the White-footed Tamarin (Saguinus leucopus), a neotropical endemic, and monotypic primate of Colombia. Few studies have been conducted on its anatomy, and thus its ulnar morphology, an essential element for this animal's quadrupedal arboreal locomotion, remains unknown. This study is based on eight specimens, fixed in formalin at 10 % whose ulnas were extracted in order to describe the main bony prominences along with muscular and ligamentous fixation functions. These elements of the locomotor apparatus and the multiple anatomical contours of the ulna of the White-footed Tamarin, exhibit characteristics for positional and articular adjustment with other... |
| Tipo: Journal article |
Palavras-chave: Anatomy; Attachments; Osteology; Primate. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000400035 |
| |
|
|
| Bogan,Sergio; Sidlauskas,Brian; Vari,Richard P; Agnolin,Federico. |
| The fossil species Arrhinolemur scalabrinii, which was described from late Miocene deposits of Entre Ríos, Argentina, is reevaluated. Whereas the species was originally placed in the Primates (Mammalia) and later made the unique member of the order Arrhinolemuroidea within the Mammalia, our analysis indicates that the specimen is rather a fish of the genus Leporinus, family Anostomidae (Characiformes). The species is redescribed, and the characters that support its new generic assignment are discussed. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argentina; Fossil; Leporinus; Osteology; Phylogeny. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300008 |
| |
|
|
| MONTEIRO,L. R.; LESSA,L. G.. |
| The variation in degrees of interdigitation (complexity) in cranial sutures among species of Caiman in different skull regions was studied by fractal analysis. Our findings show that there is a small species effect in the fractal dimension of cranial sutures, but most variation is accounted for by regional differentiation within the skull. There is also a significant interaction between species and cranial regions. The braincase sutures show higher fractal dimension than the facial skull sutures for all three species. The fractal dimension of nasal-maxilla suture is larger in Caiman latirostris than in the other species. The braincase sutures show higher fractal dimensions in C. sclerops than in the other species. The results suggest that different regions... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cranial sutures; Fractal analysis; Osteology; Caiman. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400021 |
| |
|
|
| PREVIATTO,DIEGO MATIUSSI; POSSO,SÉRGIO ROBERTO. |
| The small passerine Cyclaris gujanensis can tear into small pieces large or heavy-bodied preys that could not be swallowed whole such as frogs, snakes, bats and birds. However there are few studies on the cranial anatomy of this species. Thus, we focused on the description of the cranial osteology to contribute to the anatomical knowledge of this species and to make some assumptions about functional anatomy. The fossa temporalis is shallow but broad and the fossa of os palatinum is deepened. The os quadratum processes are long and thick. The os pterygoideum is enlarged and the upper jaw is strongly inclined ventrally (140°) with reference to the skull. The rostral extremity of rhamphotheca is hooked with ventral concavity to fit the mandible (pincer form).... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rufous-browed Peppershrike; Skull; Osteology; Anatomy.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492015001800255 |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Campello,Fernando Dantas; Bemvenuti,Marlise de Azevedo. |
| Ramnogaster arcuata (Jenyns, 1842) and Platanichthys platana (Regan, 1917), found at the estuary of Lagoa dos Patos and coastal lagoon (Lagoa Mirim) at the South of Brazil, are two sympatric clupeid fishes with very similar features. In order to clarify their taxonomic and geographical situation, delimiting its occurrence in fresh waters, a comparative study of the bony structures of the head, anal and dorsal fins and ventral scutes of these two sardines was developed. The osteological study with clear and stain technique included more information about the differentiation of the groups from the bones of the supramaxilla, dentary, pterygiophore and epipleural ribs. Variations on the body shape of those species were analyzed through the multivariate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Clupeidae; Multivariate morphometry; Morphological variation; Osteology. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300013 |
| |
|
|
| Veronese,Lauren Betina; Krause,Lígia. |
| The morphology of the axial skeleton -pressacral and sacral regions - of the nine genera of Teiidae Boulenger, 1885 comprising Ameiva Meyer, 1795, Callopistes Gravenhorst, 1838, Cnemidophorus Wagler, 1830, Crocodilurus Spix, 1825, Dicrodon Duméril & Bibron, 1839, Dracaena Daudin, 1802, Kenlropyx Spix, 1825, Teius Merrem, 1820 and Tupinambis Daudin, 1803 is here analysed under a comparative approach. The study is in a generic levei, and the principal conclusions reter to differences on the total number of vertebrae and some aspects of the ribs, especially their insertion and presence. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Teiidae; Osteology; Pressacral and sacral regions; Lizard. |
| Ano: 1997 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81751997000100002 |
| |
|
|
| Rodrigues,Fábio Lameiro; Bemvenuti,Marlise de Azevedo. |
| Gut contents of 304 individuals of the silverside Odontesthes humensis de Buen, 1953 were analyzed using frequency of occurrence (FO%) and gravimetric (P%) methods. A total of 207 individuals (68.1%) had some food itens in the gut, while 97 individuals (31.9%) had empty guts. The silverside Odontesthes humensis has presented a benthic carnivorous diet, preying mainly on molluscs and arthropods. The molluscs Heleobia sp. (FO = 61.35%) and Corbicula fluminea (Müller, 1774) (FO = 57.97%) were the most frequent itens, followed by Neocorbicula limosa (Maton, 1811) (FO = 17.39%). Among the arthropods, the coleoptera insects (FO= 18.84%) were dominant followed by, insect larvae (FO = 6.76%), the crustacean Palaemonetes argentinus Nobili, 1901 (FO = 1.93%) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atherinopsielae; Odontesthes; Osteology; Feeding habits. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000300015 |
| |
|
|
| Datovo,Aléssio; Landim,Maria Isabel. |
| Ituglanis macunaima, new species, is described from the rio Araguaia basin, Mato Grosso, Brazil. It is distinguished from its congeners by the following combination of characters: posterior fontanel absent; pectoral-fin rays usually i,4; pelvic-fin rays usually i,4; branched caudal-fin rays usually 5,5; mottled color pattern formed by irregular to roundish dark brown spots on whitish background; reduced supraorbital canal with pores s1 and s2 lacking; reduced infraorbital canal with pores i1 and i3 lacking; 2-3 pleural ribs; and 35-38 vertebrae. A detailed description and illustrations of the skeleton of I. macunaima are also provided. Comparisons with other trichomycterids are presented, and several reductive traits of I. macunaima are discussed. Some... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Loricarioidea; Osteology; Paedomorphosis; Taxonomy; Systematics. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252005000400002 |
| |
|
|
| Darlim,Gustavo; Marinho,Manoela M. F.. |
| Abstract Cladistic analysis of fishes are mostly based on osteological studies. Phylogenetic relationships within the family Characidae are poorly known in part due to the lack of anatomical studies of its members, including osteology. The present contribution aims to offer a detailed description of all bony complexes of Moenkhausia lepidura. Two remarkable morphological conditions present in the species are discussed: a bony lamella on the proximal portion of the ribs and a basal expansion of the gill rakers. A morphological survey of several species of Characidae along with available phylogenetic information of the family indicates the putative relationships of Moenkhausia lepidura with other small characids presenting bony lamella on ribs and a dark... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Osteology; Moenkhausia lepidura-group; Ribs; Gill rakers. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032018000400204 |
| |
|
|
| Lee, Michael S.Y.. |
| The morphological and molecular evidence for higher-level reptile relationships is reassessed, A combined analysis of 176 osteological, 40 soft anatomical, and 2903 (1783 aligned) molecular characters in 28 amniote taxa yields the traditional reptile tree. Synapsids (including mammals) are the sister taxon to all other amniotes, including all extant reptiles. Turtles group with anapsid parareptiles and fall outside a monophyletic Diapsida. Within diapsids, squamates and Sphenodon form a monophyletic Lepidosauria, and crocodiles plus birds form a monophyletic Archosauria. This tree is identical to the tree strongly supported by the osteological data alone when fossils are included. In a combined analysis the strong osteological signal linking turtles with... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Reptilia; Testudines; Cladistics; Osteology; Fossils; Molecular phylogenetics. |
| Ano: 2001 |
URL: http://www.repository.naturalis.nl/record/534306 |
| |
|
|
| Morales-Cazan,Alfy; Albert,James S.. |
| The systematics and taxonomy of poeciliid fishes (guppies and allies) remain poorly understood despite the relative importance of these species as model systems in the biological sciences. This study focuses on testing the monophyly of the nominal poeciliine tribe Heterandriini and the genus Heterandria, through examination of the morphological characters on which the current classification is based. These characters include aspects of body shape (morphometrics), scale and fin-ray counts (meristics), pigmentation, the cephalic laterosensory system, and osteological features of the neurocranium, oral jaws and suspensorium, branchial basket, pectoral girdle, and the gonopodium and its supports. A Maximum Parsimony analysis was conducted of 150 characters... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fish diversity; Heterandria; Ichthyology; Osteology; Pseudoxiphophorus; Systematics. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100003 |
| |
| Registros recuperados: 34 | |
|
|
|
