Laurasiatheria Laurasiatheria Laurasiatheria is a clade of placental mammals that originated on the northern supercontinent of Laurasia 99 million years ago. The clade includes shrews, pangolins, bats, whales, carnivorans, odd-toed and even-toed ungulates, among others. Laurasiatheria was discovered on the basis of the similar gene sequences shared by the mammals belonging to it; no anatomical features have yet been found that unite the group. The Laurasiatheria clade is based on DNA sequence analyses and retrotransposon presence/absence data. The name comes from the theory that these mammals evolved on the supercontinent of Laurasia, after it split from Gondwana when Pangaea broke up.
PANGAEA (data library) PANGAEA (data library) PANGAEA - Data Publisher for Earth & Environmental Science is a digital data library and a data publisher for earth system science. Data can be georeferenced in time (date/time or geological age) and space (latitude, longitude, depth/height). Scientific data are archived with related metainformation in a relational database (Sybase) through an editorial system. Data are in Open Access and are distributed through web services in standard formats on the Internet through various search engines and portals. Data set descriptions (metadata) are conform to the ISO 19115 standard and are served in various further formats (e.g. Directory Interchange