from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or pertaining to the premaxillae
- n. A premaxilla.
from the GNU version of the Collaborative International Dictionary of English
- adj. Situated in front of the maxillary bones; pertaining to the premaxillæ; intermaxillary.
from The Century Dictionary and Cyclopedia
- Situated in front of or at the fore part of the maxilla; intermaxillary; pertaining to the premaxilla.
- n. The premaxillary bone; the intermaxillary.
Sorry, no etymologies found.
Some kind of premaxillary crest was present, but the skull is not well preserved enough to determine its original shape.
Basal tyrannosauroids and other basal coelurosaurs that possess specialised premaxillary teeth that might have been used in preening/grooming of quill-like integumentary structures.
Those short premaxillary teeth present in tyrannosauroids have conventionally been regarded as having a primary role in feeding, and it might be easy to confirm this by looking for micro - or macrowear.
The score mark matches precisely the dimensions of a tyrannosaurid premaxillary tooth tip, as Luis is demonstrating with the help of a handy set of tyrannosaurid premaxillae he just happens to own.
It seems that these birds lost the teeth from the back of the jaws first, and kept their premaxillary and dentary-tip teeth the longest.
In Protarchaeopteryx, teeth are restricted to the premaxillae and anterior parts of the maxillae and dentaries, with the premaxillary teeth being a few times taller than the others (Ji et al. 1998).
In archaeopterygids for example, the premaxillary teeth are more peg-like and more procumbent than are the other teeth.
Pressure-sensitive organs termed Herbst corpuscles, embedded within pits on the premaxillary and dentary tips, are closely packed and particularly numerous in birds that probe sediments.
Could those little premaxillary teeth have been specialized for ectoparasite control?
More derived oviraptorosaurs were toothless, but the bony premaxillary margins of their upper jaw were serrated, raising the possibility that the tomium was serrated too.