WebThe Spinosauridae (or spinosaurids) are a clade or family of tetanuran theropod dinosaurs comprising ten to seventeen known genera.They came into prominence during the Cretaceous period.Spinosaurid fossils have been recovered worldwide, including Africa, Europe, South America and Asia.Their remains have generally been attributed to the …

WebCarex vallicola is a species of sedge known by the common name valley sedge.It is native to western North America from British Columbia to New Mexico, where it grows in many types of moist and dry habitat, including forest and grassland.This sedge produces clumps of stems up to about 60 centimeters tall. The inflorescence is a crowded cluster of a few …

WebTaxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC.

WebLaurasiatheria ("laurasian beasts") is a superorder of placental mammals that groups together hedgehogs (eulipotyphlans), bats (chiropterans), cats and dogs (), pangolins (), cows and whales (cetartiodactyls), horses (perissodactyls), and all their extant and extinct relatives.From systematics and phylogenetic perspectives, it is subdivided into order …