A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina
Abstract Notosuchian crocodyliforms were major components of the South American Cretaceous biota and, for over 125 years, paleontological fieldwork in this continent recovered several well-preserved fossils of these animals. They are largely recognized for terrestrial life and specialized feeding ha...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Academia Brasileira de Ciências
2023-08-01
|
| Series: | Anais da Academia Brasileira de Ciências |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000201201&lng=en&tlng=en |
| _version_ | 1797743226347585536 |
|---|---|
| author | ALEXANDER W.A. KELLNER RODRIGO G. FIGUEIREDO JORGE O. CALVO |
| author_facet | ALEXANDER W.A. KELLNER RODRIGO G. FIGUEIREDO JORGE O. CALVO |
| author_sort | ALEXANDER W.A. KELLNER |
| collection | DOAJ |
| description | Abstract Notosuchian crocodyliforms were major components of the South American Cretaceous biota and, for over 125 years, paleontological fieldwork in this continent recovered several well-preserved fossils of these animals. They are largely recognized for terrestrial life and specialized feeding habits, frequently presenting bizarre taxa such as Comahuesuchus. A new species, Comahuesuchus bonapartei n. sp. (MUCPv 597; cast MN), is described from geological strata of Sierra Barrosa Formation (Upper Turonian) and Portezuelo Formation (Lower Coniacian) of Lake Barreales, Patagonia, Argentina. The new fossil comprises a right dentary bone that shares important and unique anatomical features with specimens of Comahuesuchus brachybuccalis, such as the presence of a well-marked shelf on the lateral surface of the bone; a flat, low, and wide mandibular symphysis; an enlarged, labiolingually compressed caniniform tooth at caudal position in the dentary; the presence of serrated mesial and distal carinae in the caniniform with a faceted labial surface, and the absence or extremely reduction in number of the postcaniniform dentition. C. bonapartei differs from C. brachybuccalis in having individual dentary alveoli, rather a dentition set in groove. Phylogenetic analyses support a sister-relationship between both species, which are well nested within notosuchians. |
| first_indexed | 2024-03-12T14:52:29Z |
| format | Article |
| id | doaj.art-28a3de48b0d04108adabbb4c7ce2eef2 |
| institution | Directory Open Access Journal |
| issn | 1678-2690 |
| language | English |
| last_indexed | 2024-03-12T14:52:29Z |
| publishDate | 2023-08-01 |
| publisher | Academia Brasileira de Ciências |
| record_format | Article |
| series | Anais da Academia Brasileira de Ciências |
| spelling | doaj.art-28a3de48b0d04108adabbb4c7ce2eef22023-08-15T07:48:21ZengAcademia Brasileira de CiênciasAnais da Academia Brasileira de Ciências1678-26902023-08-0195suppl 110.1590/0001-3765202320230179A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, ArgentinaALEXANDER W.A. KELLNERhttps://orcid.org/0000-0001-7174-9447RODRIGO G. FIGUEIREDOhttps://orcid.org/0000-0002-4304-6434JORGE O. CALVOAbstract Notosuchian crocodyliforms were major components of the South American Cretaceous biota and, for over 125 years, paleontological fieldwork in this continent recovered several well-preserved fossils of these animals. They are largely recognized for terrestrial life and specialized feeding habits, frequently presenting bizarre taxa such as Comahuesuchus. A new species, Comahuesuchus bonapartei n. sp. (MUCPv 597; cast MN), is described from geological strata of Sierra Barrosa Formation (Upper Turonian) and Portezuelo Formation (Lower Coniacian) of Lake Barreales, Patagonia, Argentina. The new fossil comprises a right dentary bone that shares important and unique anatomical features with specimens of Comahuesuchus brachybuccalis, such as the presence of a well-marked shelf on the lateral surface of the bone; a flat, low, and wide mandibular symphysis; an enlarged, labiolingually compressed caniniform tooth at caudal position in the dentary; the presence of serrated mesial and distal carinae in the caniniform with a faceted labial surface, and the absence or extremely reduction in number of the postcaniniform dentition. C. bonapartei differs from C. brachybuccalis in having individual dentary alveoli, rather a dentition set in groove. Phylogenetic analyses support a sister-relationship between both species, which are well nested within notosuchians.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000201201&lng=en&tlng=enGondwanaSouth AmericaNeuquénUpper CretaceousNotosuchiaComahuesuchidae |
| spellingShingle | ALEXANDER W.A. KELLNER RODRIGO G. FIGUEIREDO JORGE O. CALVO A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina Anais da Academia Brasileira de Ciências Gondwana South America Neuquén Upper Cretaceous Notosuchia Comahuesuchidae |
| title | A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina |
| title_full | A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina |
| title_fullStr | A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina |
| title_full_unstemmed | A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina |
| title_short | A new species of Comahuesuchus Bonaparte, 1991 (Crocodyliformes: Notosuchia) from the Upper Cretaceous of Neuquén, Lake Barreales, Patagonia, Argentina |
| title_sort | new species of comahuesuchus bonaparte 1991 crocodyliformes notosuchia from the upper cretaceous of neuquen lake barreales patagonia argentina |
| topic | Gondwana South America Neuquén Upper Cretaceous Notosuchia Comahuesuchidae |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652023000201201&lng=en&tlng=en |
| work_keys_str_mv | AT alexanderwakellner anewspeciesofcomahuesuchusbonaparte1991crocodyliformesnotosuchiafromtheuppercretaceousofneuquenlakebarrealespatagoniaargentina AT rodrigogfigueiredo anewspeciesofcomahuesuchusbonaparte1991crocodyliformesnotosuchiafromtheuppercretaceousofneuquenlakebarrealespatagoniaargentina AT jorgeocalvo anewspeciesofcomahuesuchusbonaparte1991crocodyliformesnotosuchiafromtheuppercretaceousofneuquenlakebarrealespatagoniaargentina AT alexanderwakellner newspeciesofcomahuesuchusbonaparte1991crocodyliformesnotosuchiafromtheuppercretaceousofneuquenlakebarrealespatagoniaargentina AT rodrigogfigueiredo newspeciesofcomahuesuchusbonaparte1991crocodyliformesnotosuchiafromtheuppercretaceousofneuquenlakebarrealespatagoniaargentina AT jorgeocalvo newspeciesofcomahuesuchusbonaparte1991crocodyliformesnotosuchiafromtheuppercretaceousofneuquenlakebarrealespatagoniaargentina |