Aigialosauridae (Greek, aigialos = "seashore" + sauros= lizard) is family of Late Cretaceous semi-aquatic varanoid lizards, regarded by some paleontologists to form distinct monophyletic group and by others as an adaptive grade within the basal mosasauroids. Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. ... “Animalia” redirects here. ... Typical Classes See below Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates. ... Subclasses Anapsida Diapsida Synonyms Reptilia Laurenti, 1768 Reptiles are tetrapods and amniotes, animals whose embryos are surrounded by an amniotic membrane, and members of the class Sauropsida. ... Suborders Lacertilia- Lizards Serpentes - Snakes Amphisbaenia - Worm lizards This article is about the Squamata order of reptiles. ... Families Many, see text. ... Families Necrosauridae Dolichosauridae Mosasauridae Lathanotidae Aigialosauridae Varanidae Helodermatidae Varanoidea is a superfamily of lizards, including the well-known Family Varanidae (the monitors or goanna). ... See genus (mathematics) for the use of the term in mathematics. ... Families Many, see text. ... Geography of the US in the late Cretaceous Late Cretaceous (also called the Upper Cretaceous) refers to the second half of the Cretaceous period, named after the famous white chalk cliffs of southern England, which date from this time. ... Look up aquatic in Wiktionary, the free dictionary. ... Families Necrosauridae Dolichosauridae Mosasauridae Lathanotidae Aigialosauridae Varanidae Helodermatidae Varanoidea is a superfamily of lizards, including the well-known Family Varanidae (the monitors or goanna). ... A paleontologist carefully chips rock from a column of dinosaur vertebrae. ... In phylogenetics, a group is monophyletic (Greek: of one stem) if all organisms in that group are known to have developed from a common ancestral form, and all descendants of that form are included in the group. ... Subfamilies Mosasaurinae Plioplatecarpinae Tylosaurinae Mosasaurs (from Latin Mosa, the Meuse river where the fossils were first discovered + Greek sauros, lizard) were serpentine marine reptiles, more closely related to snakes than to monitor lizards (Lee 1997). ...