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Hadrogeneios
''Hadrogeneios'' is an extinct genus of afrotherian mammal recovered from the Khouribga Phosphates of the Ouled Abdoun Basin dating from the Selandian to the Thanetian. Only the type species ''H. phosphaticus'' is known for this genus, with the material being of dental and jaw specimens. The placement of ''Hadrogeneios'' recovered it to be the most basal stem-Paenungulata, paenungulate, the clade that includes elephants, Sirenia, sea cows, and hyraxes. Despite this ''Hadrogeneios'' was a contemporary of more derived members of the group such as ''Abdounodus'', ''Ocepeia'', and the early proboscideans ''Eritherium'', ''Phosphatherium'', and ''Daouitherium''. Discovery and naming The known material of ''Hadrogeneios'' were collected from the local people from an unknown site in Ouled Abdoun Basin, though it is inferred they come from the Sidi Chennane quarry. Geochemical studies of the Paleocene mammals show phosphate intervals which suggested the bed of which ''Hadrogeneios'' ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paenungulatomorpha
Paenungulatomorpha is a clade of Afrotheria, afrotherian mammals that can be characterized according to Gheerbrant et al. (2016):''by a mandibular retromolar fossa, the absence of hypocone, an ectoloph selenodont and linked to strong styles such as mesostyle in basal taxa, and a more or less developed pseudohypocone.'' Originally it was thought Paenungulata, paenungulates were closely related to the Perissodactyla, perissodactyls in the clade Altungulata due to shared attributes in the dental, osteological and soft-tissues. However this view was contested as molecular studies have widely supported that paenungulates are not related to the perissodactyls, instead more related to the widely different clade Afroinsectiphilia, with them forming the clade Afrotheria. There has been also some morphological data to support Afrotheria, though the paleontological record to support was lacking until reexamination of the genera ''Ocepeia'' and ''Abdounodus'', as well as the description of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abdounodus
''Abdounodus'' ("Abdoun tooth") is an extinct genus of mammal known from the middle Paleocene of Northern Africa. The sole species, ''A. hamdii'', is known from teeth and jaw bones discovered in the Ouled Abdoun Basin The Oulad Abdoun Basin (also known as the Ouled Abdoun Basin or Khouribga Basin) is a phosphate sedimentary basin located in Morocco, near the city of Khouribga. It is the largest in Morocco, comprising 44% of Morocco's phosphate reserves, and at ... of present-day Morocco in 2001. Discovery and naming Discovery The holotype of Abdounodus hamdii MNHN 21 was collected in French fossil markets. It consists of a left mandible and teeth. A study in 2016 described new material that included the maxillary and upper dentition. Naming The generic name combines Abdoun referring to the place of origin and odus meaning tooth. The specific name hamdii is named after M. Mohamed Hamdi, who was an active supporter for paleontological research in the region. Description A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2023 In Paleomammalogy
This article records new taxa of fossil mammals of every kind binomial nomenclature, described during the year 2023, as well as other significant discoveries and events related to paleontology of mammals which occurred in 2023. Afrotherians Proboscideans Proboscidean research * Review of the systematics and evolutionary history of African proboscideans is published by William J. Sanders, Sanders (2023). * A study on the evolution of teeth of proboscideans from East Africa over the past 26 million years is published by Saarinen & Lister (2023), who find evidence of ratchet-like mode of evolution, with periods of rapid increase in hypsodonty and Molar (tooth)#Lophodont, loph count (probably related to episodes of increase of aridity) alternating with longer periods of relative stasis rather than reversal of these traits. * Choudhary ''et al.'' (2023) report the first discovery of the fossil material of a Mammutidae, mammutid (cf. ''Zygolophodon'') from the Upper Miocene deposits ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afrotheria
Afrotheria ( from Latin ''Afro-'' "of Africa" + ''theria'' "wild beast") is a superorder of placental mammals, the living members of which belong to groups that are either currently living in Africa or of African origin: golden moles, elephant shrews (also known as sengis), otter shrews, tenrecs, aardvarks, hyraxes, elephants, sea cows, and several extinct clades. Most groups of afrotheres share little or no superficial resemblance, and their similarities have only become known in recent times due to genetics and molecular studies. Many afrothere groups are found mostly or exclusively in Africa, reflecting the fact that Africa was an island continent from the Cretaceous until the early Miocene around 20 million years ago, when Afro-Arabia collided with Eurasia. Because Africa was isolated by water, Laurasian groups of mammals such as insectivores, rodents, lagomorphs, carnivorans and ungulates could not reach Africa for much of the early to mid-Cenozoic. Instead, the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ouled Abdoun Basin
The Oulad Abdoun Basin (also known as the Ouled Abdoun Basin or Khouribga Basin) is a phosphate sedimentary basin located in Morocco, near the city of Khouribga. It is the largest in Morocco, comprising 44% of Morocco's phosphate reserves, and at least 26.8 billion tons of phosphate. It is also known as an important site for vertebrate fossils, with deposits ranging from the Late Cretaceous (Maastrichtian) to the Eocene epoch (Ypresian), a period of about 25 million years. Geography The Oulad Abdoun is located west of the Atlas Mountains, near the city of Khouribga. The Oulad Abdoun phosphate deposits encompass some , an area of . The Oulad Abdoun is the largest and northernmost of Morocco's major phosphate basins, which from northeast to southwest, include the Ganntour, Meskala, and Oued Eddahab (Laayoune-Baa) basins. Paleobiota The Oulad Abdoun Basin stretches from the late Cretaceous to the Eocene and contains abundant marine vertebrate fossils, including sharks, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oulad Abdoun Basin (borderless)
The Oulad Abdoun Basin (also known as the Ouled Abdoun Basin or Khouribga Basin) is a phosphate sedimentary basin located in Morocco, near the city of Khouribga. It is the largest in Morocco, comprising 44% of Morocco's phosphate reserves, and at least 26.8 billion tons of phosphate. It is also known as an important site for vertebrate fossils, with deposits ranging from the Late Cretaceous (Maastrichtian) to the Eocene epoch (Ypresian), a period of about 25 million years. Geography The Oulad Abdoun is located west of the Atlas Mountains, near the city of Khouribga. The Oulad Abdoun phosphate deposits encompass some , an area of . The Oulad Abdoun is the largest and northernmost of Morocco's major phosphate basins, which from northeast to southwest, include the Ganntour Basin, Ganntour, Meskala Basin, Meskala, and Oued Eddahab Basin, Oued Eddahab (Laayoune-Baa) basins. Paleobiota The Oulad Abdoun Basin stretches from the late Cretaceous to the Eocene and contains abundant m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
