Mosasauroidea is retained as a broader branch-defined mosasauroid route, distinct from node-defined Mosasauridae. Dallasaurus preserves a plesiopedal limb condition in the middle Turonian sample, while the nomenclatural analysis separates clade definitions from any single basal topology.
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Mosasauroidea is retained as the broader branch-defined mosasauroid navigation clade and is not interchangeable with node-defined Mosasauridae; the nomenclatural analysis does not provide a global range, ancestor chain or first appearance.
claim:taxon:mosasauroideaDallasaurus turneri from the middle Turonian Arcadia Park Shale supports a 93.9–89.8 Ma named mosasauroid sample window; it does not establish a global Mosasauroidea FAD or LAD.
claim:taxon:mosasauroidea:range-boundaryThe profile's named mosasauroid samples include Dallasaurus turneri from the middle Turonian Arcadia Park Shale of north-central Texas and a latest Maastrichtian Mosasaurus occurrence from the Maastricht type area of the Netherlands; these records do not establish a global Mosasauroidea distribution.
claim:taxon:mosasauroidea:biogeographyDallasaurus preserves cranial, axial and plesiopedal limb anatomy in two incomplete skeletons, while the cited nomenclatural analysis distinguishes the broader Mosasauroidea branch from node-defined Mosasauridae; limb grade is not treated as the clade definition.
claim:taxon:mosasauroidea:morphologySchulp et al. report tooth-enamel carbon-isotope, body-size and resource-partitioning results for five named mosasaurs in one type-Maastrichtian fauna; the study-bounded marine sample does not establish a single diet, body-size distribution or guild for all Mosasauroidea.
claim:taxon:mosasauroidea:ecology