dacentrurus造句

• In 1874 he salvaged the " Dacentrurus " holotype.
• Better fossil material, of the genus " Dacentrurus ", was discovered in 1874 in England.
• After 1875, half a dozen other species would be named but perhaps only " Dacentrurus armatus " is valid.
• The following cladogram shows the position of " Dacentrurus armatus " within the Thyreophora according to Maidment ( 2010 ):
• "Dacentrurus " has sometimes been portrayed with a spike growing near the shoulder, similarly to a " Kentrosaurus ".
• In 1902 the genus was renamed into " Dacentrurus " because the name " Omosaurus " had already been used for a crocodilian.
• The holotype specimen of " Dacentrurus armatus " contained a small blunt asymmetrical neck plate and also included a tail spike which could have been part of a thagomizer.
• Of the continental material she mainly thought it represented separate species, but as it was too limited to establish distinctive traits she assigned it to " Dacentrurus " sp.
• The remains were assigned to " Dacentrurus armatus " and consist of four vertebral centra, specimens MAP-4488-4491, from a single individual, two of which are caudal.
• "Kentrosaurus ", " Dacentrurus " and " Stegosaurus " are also suggested to have exhibited dimorphism in the form of three extra sacral ribs in the females.
• Both the pubic bone had a deep front part, the " processus praepubicus ", with a little upward projecting process as seen in " Dacentrurus "; the rear shaft had a lightly expanded tip.
• Earlier often considered to have been a rather basal stegosaurid, " Dacentrurus " was by more extensive cladistic analyses in 2008 and 2010 shown to be relatively derived, forming the clade Dacentrurinae with its sister species " Sereno ).
• Cobos " et alii " therefore proposed that " Miragaia " is a junior synonym of " Dacentrurus ", meaning that it is the same dinosaur, because it is not possible to differentiate the two taxa through their holotypes.
• This discovery was considered significant because it would demonstrate both the intra-specific variability of " Dacentrurus armatus ", and the strong prevalence of " Dacentrurus " in the Iberian range during the Jurassic-Cretaceous boundary, approximately 145 million years ago.
• This discovery was considered significant because it would demonstrate both the intra-specific variability of " Dacentrurus armatus ", and the strong prevalence of " Dacentrurus " in the Iberian range during the Jurassic-Cretaceous boundary, approximately 145 million years ago.
• Although " Dacentrurus " is considered to have the same proportions as " Stegosaurus ", its plate and spike configuration is known to be rather different, as it probably had both two rows of small plates on its neck and two rows of longer spikes along its tail.
• Alberto Cobos " et alii " in 2010 noted that all the diagnostic characters of " Miragaia longicollum " are based on skeletal elements that are absent in the " Dacentrurus " holotype found in England in layers of about the same age, while all traits that can be compared are shared by both genera.
• Because armored dinosaurs were very poorly known at the time, he had little to compare it to, and in light of this it is not too surprising that he later, in 1893, had it mixed up with the stegosaurian " Omosaurus " ( now " Dacentrurus " ); stegosaurs are most closely related to the ankylosaurs within the Thyreophora.
• In an earlier study by Galton in 1982, it was suggested that individual difference in the sacral rib count of both " Kentrosaurus " and " Dacentrurus " might be an indication of dimorphism : females would have had an extra pair of sacral ribs, having also the first sacral vertebra connected to the ilium, in addition to the subsequent four sacrals.
• The authors stressed that the only synapomorphy, shared derived trait, supporting the " Dacentrurus "-" Stegosaurus " clade was the possession of the long cervical postzygapophyses, and that these are in fact unknown for " Decentrurus " itself, so that its close position to " Stegosaurus " was merely based on the new data provided by the description of " Miragaia ".