Oligocene
Mostrando 25-30 de 30 artigos, teses e dissertações.
-
25. Description of two genera and species of late Eocene Anthropoidea from Egypt.
In 1987 and 1988 fossils of two previously unknown genera and species of Egyptian early Tertiary Anthropoidea were discovered in the Fayum Depression of Egypt. These are much older than all other Fayum, Oligocene primates and are believed to be Eocene in age. These genera, here named Catopithecus and Proteopithecus, come from a new Fayum site, L-41, and rese
-
26. Ancestral facial morphology of Old World higher primates.
Fossil remains of the cercopithecoid Victoria-pithecus recently recovered from middle Miocene deposits of Maboko Island (Kenya) provide evidence of the cranial anatomy of Old World monkeys prior to the evolutionary divergence of the extant subfamilies Colobinae and Cercopithecinae. Victoria-pithecus shares a suite of craniofacial features with the Oligocene
-
27. Anthropoid humeri from the late Eocene of Egypt
A number of recent studies have, by necessity, placed a great deal of emphasis on the dental evidence for Paleogene anthropoid interrelationships, but cladistic analyses of these data have led to the erection of phylogenetic hypotheses that appear to be at odds with biogeographic and stratigraphic considerations. Additional morphological data from the craniu
The National Academy of Sciences.
-
28. Primate jumping genes elucidate strepsirrhine phylogeny
Transposable elements provide a highly informative marker system for analyzing evolutionary histories. To solve controversially discussed topics in strepsirrhine phylogeny, we characterized 61 loci containing short interspersed elements (SINEs) and determined the SINE presence–absence pattern at orthologous loci in a representative strepsirrhine panel. Thi
National Academy of Sciences.
-
29. Molecular evidence for an African origin of the Hawaiian endemic Hesperomannia (Asteraceae)
Identification of the progenitors of plants endemic to oceanic islands often is complicated by extreme morphological divergence between island and continental taxa. This is especially true for the Hawaiian Islands, which are 3,900 km from any continental source. We examine the origin of Hesperomannia, a genus of three species endemic to Hawaii that always ha
The National Academy of Sciences.
-
30. The Phylogenetic Relationships of the Members of the DROSOPHILA ROBUSTA Group
The phylogenetic relationships among the species of the D. robusta group were investigated by the analysis of chromosomal differences. Six of the ten known members of the D. robusta group were available for the study: D. colorata and D. robusta from the United States, and D. sordidula, D. pseudosordidula, D. lacertosa, and D. moriwakii from Japan. Analysis o