Sentence examples for basal form from inspiring English sources
The tiny Tianyulong (which may or may not be a fairly basal form) and the certainly rather derived Psittacosaurus (a horned dinosaur).
The earliest and most basal form is the incompletely known Pisanosaurus, from the Late Triassic of Argentina.
Specialized underground storage organs are particularly common in Alliaceae, Amaryllidaceae, and Iridaceae, the basal form probably being a rhizome that is, a more or less prostrate stem that produces roots from the lower surface and a cluster of leaves from the apex.
Most prosauropods were distinctly smaller than sauropods but were still relatively large, but the oldest and most basal form, Saturnalia, was only about 5 feet (1.5 meters) long.
To "engage in politics" is a sinister act; to be "politically correct" is an immobilizing burden; to "politic" is the most basal form of cynical groveling.
To date we can infer that the most basal form of substrata relationship and reproduction within the extant flabellid genera is fixed (fragile pedicel), with transverse division as the main reproduction mode respectively (as observed in Truncatoflabellum).
They would include the true carnosaurs and coelurosaurs described below as well as a few relatively large carnivorous basal forms (such as Torvosaurus, Spinosaurus, Baryonyx, Afrovenator, and Megalosaurus).
Rhamphorhynchoidea is a term that has included all the basal forms up to the Late Jurassic Epoch (161 million to 146 million years ago).
The pubis, as in all ornithischians, had migrated backward to lie parallel to the ischium, as described above; but in all but the most basal forms, a new prepubic process began to grow forward from the pubis, eventually reaching far in front of the forward edge of the ilium and becoming expanded into a paddlelike shape in hadrosaurs.
The specialized features of stegosaurs, ankylosaurs, and of the entire group Thyreophora were sequentially acquired through a series of more basal forms.
All but the most basal forms exhibit this wing coupling.
