Noun
the original specimen from which the description of a new species is made
Source: WordNetCervical vertebra of A. ajax (holotype, YPM 1860) in side and anterior view Like those of other sauropods, the neck vertebrae are deeply bifurcated; they carried neural spines with a large trough in the middle, resulting in a wide, deep neck. Source: Internet
Antrodemus valens holotype tail vertebra (above) compared to same of Allosaurus (below) A. fragilis, "A. Source: Internet
Apart from the holotype supposedly from " New Holland ", a second specimen from the " Himalaya " may have existed (or still exist). Source: Internet
In 2005, many specimens in addition to the holotype were found assignable to A. ajax, YPM 1840, NSMT-PV 20375, YPM 1861, and AMNH 460. The specimens date from the late Kimmeridgian to the early Tithonian ages. Source: Internet
In 2015, only the A. ajax holotype YPM 1860 assigned to the species, with AMNH 460 found either to be within Brontosaurus, or potentially its own taxon. Source: Internet
Most of the skeleton was found, and after comparison with both Brontosaurus and Apatosaurus ajax, Riggs realized that the holotype of A. ajax was immature, and thus the features distinguishing the genera were not valid. Source: Internet