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Leptopleuronines
Leptopleuroninae is an extinct subfamily (biology), subfamily of procolophonid reptiles. It is defined as all taxa closer to ''Leptopleuron lacertinum'' than to ''Procolophon trigoniceps''. The oldest member of Leptopleuroninae is ''Phonodus dutoitorum'' from the Induan age of the Early Triassic. It is the only procolophonid group that survived into the Late Triassic. Phylogeny A cladogram showing relationships within Procolophonidae after Modesto ''et al''., 2010: Below are two cladograms that follow phylogenetic analyses by Butler ''et al''. (2023): Analyses 1 and 3: Strict consensus of 760 and 18 most parsimonious trees (MPTs). Analysis 2: Single MPT. References Leptopleuroninae Triassic parareptiles Early Triassic first appearances Late Triassic extinctions {{paleo-reptile-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Triassic
The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between 251.9 Ma and Ma (million years ago). Rocks from this epoch are collectively known as the Lower Triassic Series, which is a unit in chronostratigraphy. The Early Triassic is the oldest epoch of the Mesozoic Era. It is preceded by the Lopingian Epoch (late Permian, Paleozoic Era) and followed by the Middle Triassic Epoch. The Early Triassic is divided into the Induan and Olenekian ages. The Induan is subdivided into the Griesbachian and Dienerian subages and the Olenekian is subdivided into the Smithian and Spathian subages. The Lower Triassic series is coeval with the Scythian Stage, which is today not included in the official timescales but can be found in older literature. In Europe, most of the Lower Triassic is composed of Buntsandstein, a lithostratigraphic unit of continental red beds. The Early Triassic and partly also the Middle Trias ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
