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Balaenoptera Siberi
Balaenoptera siberi is an extinct species of baleen whale from the Late Miocene, described by Pilleri and Pilleri in 1989, based on fossils found in the Pisco Formation of the Pisco Basin in southwestern Peru.Demeré et al., 2005, p.115 Description The baleen whale fossils comprise a complete skeleton, including the skull, baleen, mandibles, flippers, and vertebral column. The holotype fossils are housed in a private collection, belonging to Allejandro Pezzia Asserto, while a paratype is stored in the Staatliches Museum für Naturkunde in Stuttgart, Germany. The skull of the whale has a length of and a width of and intermediate in size between ''Balaenoptera acutorostrata'' and '' B. borealis''.Demeré et al., 2005, p.116 Age Fossils of the species were found in two different locations in the Pisco Formation; Aguada de Lomas, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tortonian
The Tortonian is in the geologic time scale an age or stage of the late Miocene that spans the time between 11.608 ± 0.005 Ma and 7.246 ± 0.005 Ma (million years ago). It follows the Serravallian and is followed by the Messinian. The Tortonian roughly overlaps with the regional Pannonian Stage of the Paratethys timescale of Central Europe. It also overlaps the upper Astaracian, Vallesian and lower Turolian European land mammal ages, the upper Clarendonian and lower Hemphillian North American land mammal ages and the upper Chasicoan and lower Huayquerian South American land mammal ages. Definition The Tortonian was introduced by Swiss stratigrapher Karl Mayer-Eymar in 1858. It was named after the Italian city of Tortona in the region Piedmont. The base of the Tortonian Stage is at the last common appearance of calcareous nanoplankton '' Discoaster kugleri'' and planktonic foram '' Globigerinoides subquadratus''. It is also associated with the short normal polarized magneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrophyseter
''Acrophyseter'' is a genus of extinct sperm whales that lived in the Late Miocene off the coast of Peru comprising two species: ''A. deinodon'' and ''A. robustus''. It is part of a group of macroraptorial sperm whales which all shared several features for the purpose of hunting large prey, such as deeply-rooted and thick teeth. ''Acrophyseter'' measured , making it the smallest raptorial sperm whale. Because of its short pointed snout, and its strong curved front teeth, it probably fed on the large marine vertebrates of its time, such as seals and other whales. Discovery The genus ''Acrophyseter'' houses two species. The type species, ''A. deinodon'', was discovered in the Sud-Sacaco locality of the Pisco Formation in Peru, dating back to the Tortonian–Messinian stages of the Miocene around 8.5–6.7 million years ago (mya); the holotype specimen, MNHN SAS 1626, represents a mature individual and consists of a skull and jaw with most of the teeth intact. The second species, '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemisyntrachelus
''Hemisyntrachelus'' is an extinct genus of cetacean.''Hemisyntrachelus'' at .org Fossil records This genus is known in the s from the latest Miocene to the (age range: from 5.332 to 1.806 million years ago). Fossils are found in the marine strata of |
Piscophoca
''Piscophoca'' is an extinct genus of pinniped. The genus was named after the fossiliferous Pisco Formation in Peru, where the holotype was found. Other fossils of the genus were found in the Bahía Inglesa Formation of the Caldera Basin in Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a .... References Lobodontins Prehistoric carnivoran genera Miocene pinnipeds Pinnipeds of South America Miocene mammals of South America Neogene Peru Fossils of Peru Fossil taxa described in 1981 {{paleo-carnivora-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hadrokirus
''Hadrokirus'' is an extinct genus of true seal ( Phocidae) that lived on the coast of Peru and North Carolina about 6 million years ago. The type species, ''H. martini'', was found in the Pisco Formation, together with other marine animals such as crustaceans, sharks, coastal birds, whales and aquatic sloths. The distinguishing feature of the seal was its teeth: they were extremely robust, hence the name (, "stout" in Greek; , tooth in Quechua). It is assumed that ''Hadrokirus martini'' was durophagous; its diet probably comprised crustaceans, small bivalves and other shelled animals, similar to that of the living sea otter The sea otter (''Enhydra lutris'') is a marine mammal native to the coasts of the northern and eastern North Pacific Ocean. Adult sea otters typically weigh between , making them the heaviest members of the weasel family, but among the small .... The living seals most closely related to ''Hadrokirus'' are the Antarctic seals.Amson & De Muizon, 2013 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porpoise
Porpoises are a group of fully aquatic marine mammals, all of which are classified under the family Phocoenidae, parvorder Odontoceti (toothed whales). Although similar in appearance to dolphins, they are more closely related to narwhals and belugas than to the true dolphins. There are eight extant species of porpoise, all among the smallest of the toothed whales. Porpoises are distinguished from dolphins by their flattened, spade-shaped teeth distinct from the conical teeth of dolphins, and lack of a pronounced beak, although some dolphins (e.g. Hector's dolphin) also lack a pronounced beak. Porpoises, and other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates. Porpoises range in size from the vaquita, at in length and in weight, to the Dall's porpoise, at and . Several species exhibit sexual dimorphism in that the females are larger than males. They have streamlined bodies and two limbs that are modified into flippers. Porpoises use echolocatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piscobalaena
''Piscobalaena'' is an extinct genus of cetaceans, which lived from the Middle to Late Miocene epochs (about 11.6 to 5.3 million years ago) in Peru and Florida.''Piscobalaena'' at .org Its fossils have been found in the of and the of Florida. At least some in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocaperea
''Miocaperea'' is an extinct genus of pygmy right whale from the Miocene, Late Miocene Pisco Formation of Peru.''Miocaperea'' at Fossilworks.org Its type species is ''Miocaperea pulchra''. Evolution and significance The discovery of ''Miocaperea'' is significant, because neobalaenines were previously unknown in the fossil record, except for an isolated Petrous part of the temporal bone, petrosal (ear bone) from late Miocene-aged deposits in Australia. A previous study placed the divergence date of Neobalaeninae from other mysticetes at about 23 million years,Sasaki T, Nikaido M, Hamilton H et al. (2005) Mitochondrial phylogenetics and evolution of mysticete whales. Systematic Biology 54(1): 77–90. and the age of ''Miocaperea'' lends credence to the notion of an origin ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Incakujira
''Incakujira'' (meaning Inca whale) is a genus of rorqual whales that lived during the Late Miocene epoch in what are now the coasts of Peru, about 8 million to 7.3 million years ago. It contains a single species, ''Incakujira anillodefuego'', named and described in 2016 with known specimens coming from the Pisco Formation. Description ''Incakujira'' differs from other rorquals (fossil and extant) in having a less attenuated rostrum and the features of the maxilla, supraorbital, and remainder of the cranium. ''Kujira'' in the genus name means "whale" in Japanese. Paleobiology The twisted postglenoid process of the squamosal suggests that the lunge-feeding capabilities of ''Incakujira'' were not as great as those of extant rorquals, and that ''Incakujira'' itself also pursued additional krill Krill are small crustaceans of the order Euphausiacea, and are found in all the world's oceans. The name "krill" comes from the Norwegian Norwegian, Norwayan, or Norsk may refer to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
