First Authored Paper: Adrian Osterling Arias
🔥 Hot Paper Alert! 🔥
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This week the UTM Biology department is celebrating MSc student, Adrian Osterling Arias, for his accomplishment of having his first authored paper published in PLOS ONE. Adrian's paper reports the discovery of a new, large trematopid skull from a notable locality, found in a limestone block with various skeletal remains, and presents new anatomical traits that may help clarify the phylogenetic relationships among these Paleozoic terrestrial predators. Read below for more information and a link to the journal article!
PI: Prof. Robert Reisz
Title: A new trematopid from the lower Permian of Oklahoma and new insights into the genus Acheloma
Abstract: Modern-day terrestrial amphibians pale in comparison to their monstrous ancient relatives, the Late Carboniferous and Early Permian trematopid temnospondyls. With a skeleton that clearly indicated a terrestrial mode of life and armed with an impressive set of large, recurved marginal dentition and palatal fangs for holding their prey—this group of terrestrial temnospondyls roamed North America and Central Europe as a top predator. Lack of substantial informative fossil material has previously limited our understanding of trematopid diversity and ontogeny. Fortunately, this has improved in the last few decades with the help of exceptional localities like the Early Permian locality Richards Spur. While multiple species of dissorophid temnospondyl have been described from Richards Spur, only one trematopid species has been confidently recognized -Acheloma dunni. Here, we report on the presence of a new large, relatively mature trematopid skull from this famous locality, found encased within a limestone rich block composed mostly of skeletal remains from several other taxa. With the help of neutron computed tomography (nCT), a non-invasive method of analyzing internal and external morphologies, this specimen has revealed several features consistent with the genus, Acheloma, but distinct from Acheloma cumminsi and Acehloma dunni. The identification of these new features, in addition to the characters it shares with other Acheloma species, not only constitute it as a new species of this genus, but also challenges the notion of having synonymized Acheloma dunni with Acheloma cumminsi. In this study, we also unveil new anatomical characters that are potentially independent of ontogeny and could therefore help clarify some of the phylogenetic relationships of this fascinating group of Paleozoic terrestrial predators.
Congrats, Adrian!
Link to paper: A new trematopid from the lower Permian of Oklahoma and new insights into the genus Acheloma | PLOS ONE
