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Didolodontidae
Didolodontidae is a possibly paraphyletic family of "condylarth" mammals known from the Paleocene to the late Eocene of South America.J. N. Gelfo. 2010. The "condylarth" Didolodontidae from Gran Barranca: history of the bunodont South American mammals until the Eocene-Oligocene transition. In R. H. Madden, A. A. Carlini, M. G. Vucetich, R. F. Kay (eds.), The Paleontology of Gran Barranca: Evolution and Environmental Change through the Middle Cenozoic of Patagonia 130-14 References Paleocene first appearances Eocene extinctions Prehistoric mammal families Condylarths Meridiungulata {{Paleo-mammal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ernestokokenia
''Ernestokokenia'' is an extinct genus of mammal, belonging to the Didolodontidae. It lived during the Early Eocene and the Middle Eocene, and its fossils were discovered in South America. Description This genus is only known from its teeth, and it is then impossible to reconstruct its exact appearance. From comparison with similar and better known animals such as ''Didolodus'', its size is estimated between 60 centimeters and a meter long. ''Ernestokokenia'' was characterized by very simple molar (tooth), molars and premolars, with a bunodont structure, similar to those of ''Didolodus''. The upper third and fourth molar were differently shaped and lacked a mesostyle. The labial and lingual cingulum were well developed. Classification ''Ernestokokenia'' was a member of the Didolodontidae, an enigmatic clade of south-american mammals typicals of the early Cenozoic, of uncertain relationships. The first fossils of this animal were found in the Chubut Province in Patagonia (Arge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lamegoia
''Lamegoia'' is an extinct genus of mammals, belonging to the family Didolodontidae Didolodontidae is a possibly paraphyletic family of "condylarth" mammals known from the Paleocene to the late Eocene of South America.J. N. Gelfo. 2010. The "condylarth" Didolodontidae from Gran Barranca: history of the bunodont South American ma .... It contains a single species, ''Lamegoia conodonta'', which lived during the Late Paleocene in what is now South America. Description This animal is only known from a few fossil teeth, and reconstructing its appearance is therefore impossible. From comparison with some of his relatives, it is assumed it may have been 75 centimeters long. ''Lamegoia'' was characterized by bunodont teeth, quite similar to ''Didolodus'' but more archaic ; the lower molar (tooth), molars possessed a complete trigonid. Classification ''Lamegoia'' is a member of the Didolodontidae, a badly known clade of south-american mammals from the early Cenozoic. ''Lamegoia co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paulogervaisia
''Paulogervaisia'' is an extinct genus of mammal, belonging to the family Didolodontidae. Its fossilized remains have been found in South America. Description This genus is known only from fossilized teeth, and it is therefore impossible to reconstruct exactly its appearance. Compared with the remains of better known forms, such as his relative '' Didolodus'', it can be inferred that ''Paulogervaisia'' could reach one meter in length. ''Paulogervaisia'' is characterized by a third upper molar as wide than the second, and by a metaconus in a more lingual position than the paracone. The mesostyle was smaller than in ''Didolodus''. The third lower molar had an entoconid as large than the hypoconulid. Classification ''Paulogervaisia'' is a member of the Didolodontidae, a mysterious clade of south american mammals from the early Cenozoic, whose exact relationships are not well known. The type species is ''Paulogervaisia inusta'', described by Florentino Ameghino in 1901, based on ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saltaodus
''Saltaodus'' is an extinct genus of mammals, belonging to the family Didolodontidae. It lived during the Late Eocene, in what is now South America. Description This genus is only known from a left mandible, making it impossible to reconstruct its overall appearance. It is assumed to have been a small sized animal, and comparison with its better known relative '' Didolodus'' indicates that ''Saltaodus'' must have weighed less than five kilograms. It was characterized by the presence of a well developed canine and a brachydont dentition. The first and second lower premolars were single rooted. Compared to the Kollpaniidae, another group of archaic South American mammals, ''Saltaodus'' had taller and more separated cusps, with a well developed cristid. The basin of the talonids was large and wasn't filled by the base of the hypoconid or by the distal wall of the metaconid. The fourth lower premolar was distinctly similar to a molar. Classification ''Saltaodus'' was a member of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Umayodus
''Umayodus'' is an extinct genus of "condylarth" mammal from the late Paleocene or the earliest Eocene.''Umayodus'' at .org It is a didolodontid which lived in what is now . It is known from the LU3-801, an isolated right , w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Didolodus
''Didolodus'' is an extinct genus of mammals from Middle Eocene Argentina. It is an ungulate mammal of uncertain affinities, possibly related to Litopterna, though this is uncertain due to the lack of reliable post-cranial remains, and for now remains Meridiungulata ''incertae sedis''.Javier Nicolás, The alleged astragalar remains of Didolodus Ameghino, 1897 (Mammalia, Panameriungulata) and a critic of isolated bone association models, 2012 Its remains were found in the Sarmiento Formation of Patagonia.''Didolodus'' at .org ''Didolodus'' probably was a quick-footed creature which probably lived like early |
Condylarths
Condylarthra is an informal group – previously considered an order – of extinct placental mammals, known primarily from the Paleocene and Eocene epochs. They are considered early, primitive ungulates. It is now largely considered to be a wastebasket taxon, having served as a dumping ground for classifying ungulates which had not been clearly established as part of either Perissodactyla or Cetartiodactyla, being composed thus of several unrelated lineages. Taxonomic history Condylarthra always was a problematic group. When Condylarthra was first described by , Phenacodontidae was the type and only family therein. , however, raised Condylarthra to an order and included a wide range of diverse placentals with generalized dentitions and postcranial skeletons. More recent researchers (i.e. post-WW2) have been more restrictive; either including only a limited number of taxa, or proposing that the term should be abandoned altogether. Due to their primitive characteristics condylar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleocene
The Paleocene, ( ) or Palaeocene, is a geological epoch (geology), epoch that lasted from about 66 to 56 mya (unit), million years ago (mya). It is the first epoch of the Paleogene Period (geology), Period in the modern Cenozoic Era (geology), Era. The name is a combination of the Ancient Greek ''palaiós'' meaning "old" and the Eocene Epoch (which succeeds the Paleocene), translating to "the old part of the Eocene". The epoch is bracketed by two major events in Earth's history. The K–Pg extinction event, brought on by Chicxulub impact, an asteroid impact and possibly volcanism, marked the beginning of the Paleocene and killed off 75% of living species, most famously the non-avian dinosaurs. The end of the epoch was marked by the Paleocene–Eocene Thermal Maximum (PETM), which was a major climatic event wherein about 2,500–4,500 gigatons of carbon were released into the atmosphere and ocean systems, causing a spike in global temperatures and ocean acidification. In the Pal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oligocene
The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain. The name Oligocene was coined in 1854 by the German paleontologist Heinrich Ernst Beyrich from his studies of marine beds in Belgium and Germany. The name comes from the Ancient Greek (''olígos'', "few") and (''kainós'', "new"), and refers to the sparsity of extant forms of molluscs. The Oligocene is preceded by the Eocene Epoch and is followed by the Miocene Epoch. The Oligocene is the third and final epoch of the Paleogene Period. The Oligocene is often considered an important time of transition, a link between the archaic world of the tropical Eocene and the more modern ecosystems of the Miocene. Major changes during the Oligocene included a global expansion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
