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RISS 인기검색어
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- 저자 : Paulina-Carabajal, Ariana (검색결과 2 건)
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Paulina-Carabajal, Ariana,Lee, Yuong-Nam,Kobayashi, Yoshitsugu,Lee, Hang-Jae,Currie, Philip J. Elsevier 2018 Palaeogeography, palaeoclimatology, palaeoecology Vol.494 No.-
<P><B>Abstract</B></P> <P>Ankylosaur braincase and endocranial morphologies are poorly known. Furthermore, cranial endocasts have been described for fewer than ten taxa so far. The complete inner ear morphology is known for only three species – <I>Euoplocephalus tutus</I>, <I>Kunbarrasaurus ieversi</I>, and <I>Pawpawsaurus campbelli</I>. Here, the first cranial endocast morphologies are presented for the Mongolian Cretaceous ankylosaurids <I>Talarurus plicatospineus</I> and <I>Tarchia teresae</I>. The study of paleoneurological features of these Mongolian taxa adds novel anatomical information to both species allowing the first comparison with ankylosaurids from North America. The development of a cerebellar flocculus that leaves an impression on the vestibular eminence – floccular recess – is observed in <I>Euoplocephalus</I>, <I>Talarurus</I> and <I>T</I>. <I>teresae</I>. Because this structure hasn't been identified in any nodosaurid so far, its presence in ankylosaurid cranial endocasts may represent a possible synapomorphy with unknown paleobiological implications.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Ankylosaur neuroanatomy is poorly known. </LI> <LI> The cranial endocasts of Talarurus and Tarchia are described by the first time. </LI> <LI> The presence of flocculus seems to be characteristic of the Ankylosauridae. </LI> <LI> Nodosaurids and ankylosaurids had different sense of hearing. </LI> </UL> </P>
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Lee, Yuong-Nam,Lee, Hang-Jae,Kobayashi, Yoshitsugu,Paulina-Carabajal, Ariana,Barsbold, Rinchen,Fiorillo, Anthony R.,Tsogtbaatar, Khishigjav Elsevier 2019 Palaeogeography, palaeoclimatology, palaeoecology Vol.533 No.-
<P><B>Abstract</B></P> <P>Crocodyliform tracks are reported from the Upper Cretaceous (?Cenomanian-Santonian) Bayanshiree Formation in southeastern Mongolia. Ten tracks are preserved as natural casts, forming a trackway with a quadrupedal gait pattern with a tail trail. All tracks are short and wide, and dominated by toe traces without plantar impressions. Pes tracks are characterized by four deep claw impressions and push-back marks behind them. Manus tracks have shallow claw marks and long, sub-parallel scratch marks behind. The preferential association of the scratch marks with only the distal digit impressions and irregular pattern of footfalls suggests that this trackway was made by a bottom walking and punting crocodyliform under water. This trackway represents the first crocodyliform “swim tracks” in the Late Cretaceous of Asia and the first evidence for punting behaviour of a fossil crocodyliform. The “swim tracks” can be divided into two categories such as bottom walking tracks with punting for moving somewhat more quickly and subaqueous walking tracks without punting to be associated with slower underwater speeds. The tracks show that crocodylians had adopted a bottom walking behaviour similar to extant crocodylians by Cretaceous times.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The first report of crocodyliform “swim tracks” in the Late Cretaceous of Asia </LI> <LI> The first evidence for punting behaviour of a fossil crocodyliform </LI> <LI> Conspicuous dragging behaviour during bottom walking </LI> <LI> Division into two categories of crocodyliform “swim tracks” </LI> </UL> </P>
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