of these dinosaur specimens may also reflect a decrease in abundance of brachiosaurids acting in combination with the poor fossil record. Also, in 2017 a study indicated that Padillasaurus was not a brachiosaurid but a basal member of the Somphospondyli. Classification Brachiosauridae is one of the two major clades of Titanosauriformes, a diverse group of sauropods that existed in the Late Jurassic and Cretaceous in Laurasia and Gondwana. Europasaurus is considered the most basal brachiosaurid. Titanosauriformes was a globally distributed, long-lived clade of dinosaurs that contained both the largest and smallest known sauropods. This clade was composed of three distinct groups: Brachiosauridae, a mix of Late Jurassic and Early Cretaceous sauropods, Euhelopodidae, a group of mid-Cretaceous East Asian sauropods, and Titanosauria, a large Cretaceous clade located mostly in Gondwana. Traditionally, Brachiosauridae included Brachiosaurus and some other suggestively assigned genera. Following the generic separation of Brachiosaurus species into B. altithorax and Giraffatitan brancai these have sometimes been the only members supported by cladistic analysis. Cladogram of Brachiosauridae after D'Emic et al. (2016). Cladogram of Brachiosauridae after Mannion et al. (2017). References External links Artist's rendering of fourteen brachiosaurs Brachiosauridae Kimmeridgian first appearances Early Cretaceous extinctions Prehistoric dinosaur families