The premaxilla has six teeth and the maxilla has at least thirteen teeth. (wikipedia.org)
However, they also noticed more derived euornithopod traits, such as the form of the greater and anterior trochanter of the thighbone, although the premaxilla not reaching the lacrimal, the high jaw joint and the premaxilla being on the same level as the maxilla, were again basal traits. (wikipedia.org)
Very basal ornithischian traits included the presence of six teeth in the premaxilla with only a short toothless sector in front and a short hiatus with the maxillary teeth. (wikipedia.org)
Data from these scans provide new anatomical information, such as the presence of branching vascular canals within the premaxilla and dentary, and an undescribed dorsal (quadrate) wing of the pterygoid hidden within matrix. (peerj.com)
Enlarged teeth on premaxilla, dentary and palatine. (nct4g.org)
Premaxilla narrow, widest point of premaxillary body 12-14 % in premaxillary length. (nct4g.org)
Apomorphic traits are concentrated on the frontal, squamosal, braincase, and premaxilla, including the presence of three premaxillary teeth. (bvsalud.org)
Dorsal1
Broad parietals are situated in the lateral plane, but they take up a short region at the posterior end of the skull roof and only reach around to create the dorsal surface of the lower temporal bar. (wikipedia.org)
Posterior1
The new species belongs to the subgenus Bryconops based on its edentulous and short maxilla, with the posterior extension of that bone not reaching the junction between the second and third infraorbitals. (bio.br)
Palatine1
The ectopterygoid serves as a location where the pterygoid can be joined to both the palatine and maxilla. (wikipedia.org)
Pterygoid1
The pterygoid then splits to outline the choanae before eventually widening toward the anterior part of the palate. (wikipedia.org)
Analyses1
Phylogenetic analyses using parsimony and Bayesian inference posit Iani as a North American rhabdodontomorph based on the presence of enlarged, spatulate teeth bearing up to 12 secondary ridges, maxillary teeth lacking a primary ridge, a laterally depressed maxillary process of the jugal, and a posttemporal foramen restricted to the squamosal, among other features. (bvsalud.org)
Mandibular1
The dentary envelopes a large mandibular fenestra, another defining characteristic. (wikipedia.org)
Ventral2
The large premaxillary portion of the jaw is joined with small ventral exposures to create a secondary palate. (wikipedia.org)
The deeply inset ventral margin in the maxilla suggests fleshy cheeks may have been present. (wikipedia.org)
Fenestra1
and the absence of an external fenestra in the lower jaw. (wikipedia.org)
Skull3
This would have supplied the skull and existing teeth with the nutrients needed to grow and strengthen. (wikipedia.org)
Because tusks are not a feature of the skull, there is no structure taking up room and crowding the maxillary area. (wikipedia.org)
The length of the skull is 6.3 centimetres (2.5 in) and the lower jaws of the mandible are 5.9 centimetres (2.3 in) each. (wikipedia.org)
Length1
This trend, coupled with a likely lower bound on forelimb reduction, hypothesized to be about 0.4 forelimb/femur length, combined to produce this short-armed pattern in theropods. (bvsalud.org)
Small1
The evolution of longirostrine morphology and a bulbous anterior rosette of premaxillary teeth also occurs in the spinosaurid theropod dinosaurs, leading to suggestions that at least some members of this clade also had a diet comprising a notable proportion of fish or other small vertebrates. (fr.gd)
Portion1
Herrerasaurus ischigualastensis ( Reig, 1963 ), Sanjuansaurus gordilloi ( Alcober & Martinez, 2010 ), both from the Ischigualasto Formation of Argentina, and Staurikosaurus pricei ( Colbert, 1970 ) from the lower portion of the Santa Maria Formation of southern Brazil. (peerj.com)
Large1
In this paper, we describe the partial skeleton of a large ichthyosaur from the Lower Jurassic (lower Sinemurian) of Warwickshire, England, which was conserved and rearticulated to form the centrepiece of a new permanent gallery at the Thinktank, Birmingham Science Museum in 2015. (peerj.com)
Slightly2
The femur is bowed and has an anterior trochanter slightly lower than the greater trochanter and a third as narrow as the latter. (wikipedia.org)
Ichthyosaur fossils are abundant in Lower Jurassic sediments with nine genera found in the UK. (peerj.com)
Vertebrae2
Induszalim bala is the first diagnostic mesoeucrocodile from Indo-Pakistan subcontinent having rostrum articulated with dentary symphysis and associated vertebrae and limb bones and provides facility for comparison with other mesoeucrocodiles. (scirp.org)
Row 2, holotypic rostrum MSM-155-19c in anterior view, lectotypic caudal vertebrae un-number and MSM-65-19 in one view. (scirp.org)
Induszalim bala shows anterodorsally directed external nares, high or deep and narrow rostrum, the ziphodont type laterally compressed teeth (symmetric to asymmetric oval to asymmetric D shaped, subcircular and heterodont in size), and thick rostral elements. (scirp.org)
Jaws5
Here, we present a new sphenodontian species from the Early Jurassic of North America (Arizona, USA) represented by a nearly complete articulated skeleton and dozens of upper and lower jaws forming the most complete ontogenetic series in the sphenodontian fossil record. (nature.com)
A considerable portion of sphenodontian fossil diversity is represented only by fragmentary specimens of little systematic value, such as isolated jaws and teeth-e.g., refs. (nature.com)
The length of the skull is 6.3 centimetres (2.5 in) and the lower jaws of the mandible are 5.9 centimetres (2.3 in) each. (wikipedia.org)
Protoceratops , like many other ceratopsians, were herbivores equipped with prominent jaws and teeth suited for chopping foliage and other plant material. (wikipedia.org)
1970) suggested that the addition of larger teeth at the rear of the dental rows in monophyodont lizards would be a way to maintain appropriate sized teeth in continuously growing jaws. (researchgate.net)
Ontogenetic2
Our analysis of 32 specimens has shown a pattern of ontogenetic tooth loss through the reduction of overall tooth counts from 13 to 10 tooth positions (Fig. 1I). (researchgate.net)
The ontogenetic reduction in tooth count in Opisthodontosaurus is difficult to quantify statistically because most of the dentaries are incomplete, making jaw length an ineffective metric by which to approximate size or age of the individual. (researchgate.net)
Skulls1
These skulls can be classified as Myosaurus because this species, unlike other dicynodonts, do not possess tusks or postfrontal teeth. (wikipedia.org)
Species1
Two new species of Bryconamericus are described from southern Brazil: B. patriciae, from the headwaters of rio Pelotas (rio Uruguay drainage) and rio das Antas (laguna dos Patos drainage) and B. ecai from lower rio Taquari drainage. (scielo.br)
External1
Reptilian dentitions tend to be homodont (Montanucci, 1968) readily masking any external anatomical evidence of a change in tooth position that would be associated with tooth replacement, as the new tooth would look very similar in size and shape to its predecessor. (researchgate.net)
Formation2
The Texas Terminonaris fossils were collected along the northern shore of Lewisville Lake at low lake level in the Arlington Member in the uppermost part Woodbine Formation (SMU Loc. (unl.pt)
nov., from the Cenomanian-age lower Mussentuchit Member, Cedar Mountain Formation of Utah, USA. (bvsalud.org)
Position1
Most reptiles exhibit minimal change in tooth position and tooth count, with a few documented exceptions (e.g. (researchgate.net)
Plant1
Although the back, maxillary, teeth are fan-shaped like those of a plant eater, the front premaxillary teeth are narrower and longer, more like a carnivorous dinosaur. (wikipedia.org)
Replacement1
Tooth implantation has been conflated with other tooth characteristics, such as replacement, attachment, and morphology. (researchgate.net)
Upper1
P. andrewsi had a pair of cylindrical, blunt teeth near the tip of the upper jaw. (wikipedia.org)
Rare1
The stratigraphic provenance of this specimen merits particular attention, because plesiosaurians of Pliensbachian age are rare compared to other stages of the Lower Jurassic. (bioone.org)
Member1
Prior to this discovery, neornithischian paleobiodiversity in the Mussentuchit Member was based primarily on isolated teeth, with only the hadrosauroid Eolambia caroljonesa named from macrovertebrate remains. (bvsalud.org)