| 词条 | Palaeospheniscus |
| 释义 |
| fossil_range = {{fossilrange|Early Miocene|Early Pliocene}} | image = Spheniscidae - Palaeospheniscus sp..jpg | image_caption = Fossil skull of Palaeospheniscus from Peru | taxon = Palaeospheniscus | authority = Moreno & Mercerat, 1891 | synonyms =Neculus Ameghino, 1905 Paraspheniscus Ameghino, 1905 Perispheniscus Ameghino, 1905 Pseudospheniscus Ameghino, 1905 Chubutodyptes Simpson, 1970 (disputed) }} Palaeospheniscus is an extinct genus of penguins belonging to the subfamily Palaeospheniscinae. These penguins are apparently not closely related to the modern genus Spheniscus. DescriptionThe species of Palaeospheniscus were medium-sized to largish penguins, ranging from P. gracilis with an estimated maximal length of 55 cm to P. wimani, which reached up to 73 cm. SpeciesThis genus contains the following three species:[1]
The following other species are disputed:
They are all (except P. bergi, which is somewhat enigmatic) known from one or two handful of bones. Most of the specimens were found in Santa Cruz and Chubut Provinces of Patagonia, Argentina. The fossils were recovered from the Patagonian Molasse Formation, and are probably Early Miocene to Late Miocene or possibly Early Pliocene in age (Stucchi et al. 2003). The type species of this genus is Palaeospheniscus patagonicus, the Patagonian slender-footed penguin. Palaeospheniscus gracilis was long believed to be from the Early Oligocene, but this is now thought to be erroneous. P. gracilis and P. wimani are often considered synonyms of P. patagonicus.{{Citation needed|date=February 2007}} Recent researchers also tend to merge Chubutodyptes into this genus as P. biloculatus.{{Citation needed|date=February 2007}} DistributionSpecimen belonging to this genus have been found in the Pliocene of South Africa, in Miocene to Pliocene of Chile, in Miocene of Argentina and South Africa and in Oligocene to Miocene of Argentina and Peru.[1] ==References==
External links1. ^1 Paleobiology Database {{portal|Paleontology}}{{Taxonbar|from=Q3889329}} 5 : Pliocene birds of South America|Bird genera|Miocene birds of South America|Palaeospheniscus|Extinct penguins |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。