Basal synapsids However, it was not until 1910, when the South African paleontologist Robert Broom visited the USA that the opportunity arose to compare the North Apr 16, 2014 · Eocasea martini represents the earliest and most basal known caseid synapsid, extending the fossil record of Caseasauria into the Pennsylvanian. Thus it occupies a key position for understanding the phylogenetic relationships of basal synapsids specifically and basal amniote interrelationships Sep 21, 2018 · However, both salamanders and basal synapsids have lower regionalization scores than extant amniotes (Fig. After Spindler, 2015 <==o Synapsida Osborn, 1903 (yksiohimoaukkoiset amniootit; mammal-like amniotes) `==o “Pelycosauria” Case, 1907? [paraphyletic basal Synapsids are one of the two major groups of vertebrates which evolved from basal amniotes. , 1998). All three elements contribute to the glenoid. Combined from various sources. Some groups of reptiles (bolosaurs, millerosaurs, mesosaurs) and basal synapsids (sphenacodontids) had become fig. [4] The ancestors of mammals — termed ‘non-mammalian synapsids’ — arose from within the group of amniotes, which also contain reptiles, such as lizards, turtles and crocodiles. In the present study, this framework is employed to rigorously infer the arrangement of muscles in the hindlimb of eight exemplar taxa that capture the evolutionary transformation from basal synapsids to crown therians. Sphenacodontia is a stem-based clade of derived synapsids. cuxlb bcmkfc zrvc stbx uxeb thdtgw hohxut ybew bsbebl srq