aegirosaurus造句

• Within Ophthalmosauridae, scientists once believed " Aegirosaurus " was most closely related to " Ophthalmosaurus ".
• Unlike " Aegirosaurus " and " Sveltonectes insolitus ", the anterior process of its maxilla is elongated anteriorly, reaching the level of the nasal bone.
• In addition to its late Jurassic occurrence, " Aegirosaurus " has recently been discovered from the late Valanginian ( Early Cretaceous ) of Southeastern France ( Laux-Montaux, department of Dr鬽e; Vocontian Basin ), the first diagnostic ichthyosaur recorded from the Valanginian.
• However, many recent cladistic analyses found it is more closely related to " Sveltonectes " ( and probably to " Undorosaurus " ) . " Aegirosaurus " lineage was found to include " Brachypterygius " and " Maiaspondylus " too, and to nest within Platypterygiinae, which is the sister taxon of Ophthalmosaurinae.
• This process is remarkably short compared to other ophthalmosaurids, being less than half of the length of the humeral shaft, a condition also seen in " Undorosaurus " and " Aegirosaurus "; in " Ophthalmosaurus " . " Brachypterygius ", " Paraophthalmosaurus ", and " Cryopterygius ", the process reaches the midpoint of the humerus, while it is even longer in " Arthropterygius ", " Platypterygius americanus ", " Platypterygius australis ", and " Platypterygius hercynicus ".
• The bottom end of the humerus is larger than the top end; it bears three articular facets, with one for the preaxial accessory element ( the smallest of the three ), one for the radius ( the tallest of the three ), and one for the ulna ( which forms an angle of 120?with the radial facet ) . " Sveltonectes ", " Nannopterygius ", " Platypterygius hauthali ", and " Platypterygius platydactylus " all only have two; " Maiaspondylus ", " Aegirosaurus ", " Brachypterygius ", and " Platypterygius americanus " also have three, but the second facet articulates with a different bone; " Cryopterygius " has two on the left humerus and three on the right; and " Platypterygius australis " and " Platypterygius hercynicus " have up to four facets.