Cranial and endocranial anatomy of a three‐dimensionally preserved teleosauroid thalattosuchian skull
Cranial and endocranial anatomy of a three‐dimensionally preserved teleosauroid thalattosuchian skull
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三维保存的远龙科海鳄头骨的颅骨和颅内解剖
DOI:
10.1002/ar.24704
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Turner, Alan H.
中科院分区:
文献类型:
--
作者:
Wilberg, Eric W.;Beyl, Alexander R.;Pierce, Stephanie E.;Turner, Alan H.
Thalattosuchians represent one of the several independent transitions into the marine realm among crocodylomorphs. The extent of their aquatic adaptations ranges from the semiaquatic teleosauroids, superficially resembling extant gharials, to the almost cetacean‐like pelagic metriorhynchids. Understanding the suite of osteological, physiological, and sensory changes that accompanied this major transition has received increased attention, but is somewhat hindered by a dearth of complete three‐dimensionally preserved crania. Here, we describe the cranial and endocranial anatomy of a well‐preserved three‐dimensional specimen ofMacrospondylus bollensisfrom the Toarcian of Yorkshire, UK. The trigeminal fossa contains two similar‐sized openings separated by a thin lamina of prootic, a configuration that appears unique to a subset of teleosauroids.Macrospondylus bollensisresembles other thalattosuchians in having pyramidal semicircular canals with elongate cochlear ducts, enlarged carotid canals leading to an enlarged pituitary fossa, enlarged orbital arteries, enlarged endocranial venous sinuses, reduced pharyngotympanic sinuses, and a relatively straight brain with a hemispherical cerebral expansion. We describe for the first time the olfactory region and paranasal sinuses of a teleosauroid. A relatively large olfactory region suggests greater capacity for airborne olfaction in teleosauroids than in the more aquatically adapted metriorhynchoids. Additionally, slight swellings in the olfactory region suggest the presence of small salt glands of lower secretory capacity than those of metriorhynchoids. The presence of osteological correlates for salt glands in a teleosauroid corroborates previous hypotheses that these glands originated in the common ancestor of Thalattosuchia, facilitating their rapid radiation into the marine realm.
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DOI:
--
发表时间:
1962
期刊:
影响因子:
--
作者:
F. Westphal
通讯作者:
F. Westphal
影响因子:
2.6
作者:
S. Pierce;K. Angielczyk;E. Rayfield
通讯作者:
E. Rayfield
DOI:
10.1098/rstb.1990.0185
发表时间:
1990
期刊:
Philosophical Transactions of the Royal Society B
影响因子:
--
作者:
A. D. Walker
通讯作者:
A. D. Walker
影响因子:
1.5
作者:
Yanina Herrera;M. Fernández;Z. Gasparini
通讯作者:
Z. Gasparini
DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
Yanina Herrera;Marta S. Fernández;J. Varela
通讯作者:
J. Varela