Neurocranial anatomy of Paralligator (Neosuchia: Paralligatoridae) from the Upper Cretaceous of Mongolia DOI
Ivan T. Kuzmin, Ekaterina A. Sichinava, E. V. Mazur

и другие.

Zoological Journal of the Linnean Society, Год журнала: 2024, Номер 203(1)

Опубликована: Дек. 13, 2024

Abstract Neurocranial features appear to be phylogenetically informative and key in assessing the still contentious relationships within Crocodylomorpha. However, braincases of many non-crocodylian taxa are incompletely studied precluding assessment evolutionary modifications at base Crocodylia. Here, we describe braincase osteology neuroanatomy paralligatorid crocodylomorph Paralligator from Upper Cretaceous Mongolia based on computed tomography (CT)-scanning, segmentation, 3D modelling several specimens. The anatomy brain endocast, nerves, paratympanic pneumatic cavities is consistent with its phylogenetic position close or Eusuchia. shares a suit neuroanatomical basal eusuchians crocodylians reflecting plesiomorphic condition for In addition, differences endocasts between larger-sized individuals Kansajsuchus smaller Shamosuchus ontogenetic changes extant crocodylians. This suggests that members more clade Paralligatoridae crown-group Crocodylia share similar during ontogeny. We also review distribution mesethmoid Crocodylomorpha show presence clades including Dyrosauridae.

Язык: Английский

A review of the non‐semiaquatic adaptations of extinct crocodylomorphs throughout their fossil record DOI Open Access
Yohan Pochat‐Cottilloux

The Anatomical Record, Год журнала: 2024, Номер 308(2), С. 266 - 314

Опубликована: Ноя. 25, 2024

Abstract Crocodylomorphs constitute a clade of archosaurs that have thrived since the Mesozoic until today and survived numerous major biological crises. Contrary to historic belief, their semiaquatic extant representatives (crocodylians) are not living fossils, and, during evolutionary history, crocodylomorphs evolved live in variety environments. This review aims summarize non‐semiaquatic adaptations (i.e., either terrestrial or fully aquatic) different groups from periods, highlighting how exactly those lifestyles inferred for animals, with regard geographic temporal distribution phylogenetic relationships. The ancestral condition Crocodylomorpha seems been lifestyle, linked several morphological such as an altirostral skull, long limbs allowing erect posture specialized dentition diets based on land. However, some members this clade, thalattosuchians dyrosaurids display opposite, aquatic interestingly same type observations. Finally, new techniques inferring paleobiology extinct animals put forward last decade, appearing complementary approach traditional descriptions comparisons. Such is case paleoneuroanatomical (CT scan data), histological, geochemical studies.

Язык: Английский

Процитировано

4

Neurocranial anatomy of Paralligator (Neosuchia: Paralligatoridae) from the Upper Cretaceous of Mongolia DOI
Ivan T. Kuzmin, Ekaterina A. Sichinava, E. V. Mazur

и другие.

Zoological Journal of the Linnean Society, Год журнала: 2024, Номер 203(1)

Опубликована: Дек. 13, 2024

Abstract Neurocranial features appear to be phylogenetically informative and key in assessing the still contentious relationships within Crocodylomorpha. However, braincases of many non-crocodylian taxa are incompletely studied precluding assessment evolutionary modifications at base Crocodylia. Here, we describe braincase osteology neuroanatomy paralligatorid crocodylomorph Paralligator from Upper Cretaceous Mongolia based on computed tomography (CT)-scanning, segmentation, 3D modelling several specimens. The anatomy brain endocast, nerves, paratympanic pneumatic cavities is consistent with its phylogenetic position close or Eusuchia. shares a suit neuroanatomical basal eusuchians crocodylians reflecting plesiomorphic condition for In addition, differences endocasts between larger-sized individuals Kansajsuchus smaller Shamosuchus ontogenetic changes extant crocodylians. This suggests that members more clade Paralligatoridae crown-group Crocodylia share similar during ontogeny. We also review distribution mesethmoid Crocodylomorpha show presence clades including Dyrosauridae.

Язык: Английский

Процитировано

0