While CT imaging showed a posterior nasal mass protruding through a defect in the clivus, MRI revealed an extradural mass containing admixed dentigerous and adipose pockets extending from the middle cranial fossa through the basisphenoid
with associated dramatic duplication of the pituitary gland and vertebrobasilar feeders.
The majority of the skeletal anomalies observed in metolachlor-exposed fetuses consisted of absent xiphoid process (150 mg [kg.sup.-1] bw [day.sup.-1]), incomplete ossification of sternebra (300 and 1000 mg [kg.sup.-1] bw [day.sup.-1]), absent sternebra, incomplete ossification of xiphoid process and increased distance between hamulus and basisphenoid
(1000 mg [kg.sup.-1] bw [day.sup.-1]).
The characteristic imaging feature of an osseous stalk arising from the basisphenoid
portion of the clivus may help make the proper diagnosis and guide treatment.
The ossification is observed in the medial and posterior regions of the basal plate, which correspond to basisphenoid
, basioccipital and exoccipital.
Xinjiangchelys latimarginalis (Young and Chow, 1953)): absence of basipterygoid process, absence of paired pits on the ventral surface of the basisphenoid
; foramen jugulare posterius not formed in bone.
It started at the wing and pterygoid process of the basisphenoid
bone and connected to the joint capsule on the tip of the medial side of the mandibular condyle.
The aeration process begins at approximately 3 years of age in the anterior portion of the sphenoid bone in the area known as thepresphenoid, and it progresses posteriorly into the basisphenoid
area until it reaches the anterior wall of the clivus.
bone had a sharp median ridge on its body.
In addition to the photographic records, we collected a skull of an adult (basisphenoid
suture closed) jaguar from the same locality in November 2010.
3); one pair of slender uroneurals; three epurals; a free parhypural; three thin supraneurals, generally straight; two supernumerary spines on first dorsal pterygiophore; no procumbent spines (spurs); thin Y-shaped basisphenoid
, free from parasphenoid and prootics; neurocranium with frontal tabs similar to Vincentia Castelnau, 1872 (Fraser 1972: pl 31); supramaxilla absent; posttemporal smooth or with 1-3 small serrae on posterior margin; preopercle with 2-3 small, widely spaced serrae near angle, ridge smooth; infraorbitals smooth; infraorbital shelf present on third bone; ring of scleral cartilage, no ossification present; 7 branchiostegals; ceratohyal notched, suture smooth with epihyal; urohyal with short anterior process.