Information om | Engelska ordet LEPOSPONDYLS

Exempel på hur man kan använda LEPOSPONDYLS i en mening

• The tetrapod groups that are hypothesized as ancestors of modern amphibians (lepospondyls and amphibamid temnospondyls) appear in the Late Carboniferous, roughly 300 million years ago.
• With the exception of one late-surviving lepospondyl from the Late Permian of Morocco (Diplocaulus minimus), lepospondyls lived from the Visean stage of the Early Carboniferous to the Early Permian and were geographically restricted to what is now Europe and North America.
• The two major hypotheses for lissamphibian origins are that they are either descendants of dissorophoid temnospondyls or microsaurian "lepospondyls".
• However, later phylogenetic studies recovered Tulerpeton outside the least inclusive clade containing amniotes and lissamphibians, finding it to be more distantly related to amniotes than such extinct tetrapods as lepospondyls, seymouriamorphs, Embolomeri, temnospondyls, baphetids, colosteids and whatcheeriids were.
• Possible prey from the known fauna of the early Permian of both Texas and Oklahoma may have included other small amniotes, small dissorophid temnospondyls, and microsaurian lepospondyls.
• This naming convention is an homage to Edward Drinker Cope's affection for naming snake-like lepospondyls after infernal rivers, such as Phlegethontia (named after Phlegethon) and Cocytinus (named after Cocytus).
• The most common lepospondyls, and indeed the most common tetrapods as a whole, are Sauropleura pectinata and Ptyonius marshii (both newt-like urocordylid nectrideans), followed by Ophiderpeton amphiuminum (a legless aistopod) and Diceratosaurus brevirostris (an early diplocaulid nectridean).
• Utaherpeton has been proposed as both the most basal lepospondyl and the oldest "microsaur", although more derived lepospondyls are known from earlier in the Carboniferous.
• The Richards Spur locality presents a very rich Early Permian vertebrate paleofauna, including species of chondrichthyes, lepospondyls, seymouriamorphs, basal synapsids, and basal eureptiles.
• Holospondyli is a proposed clade of lepospondyls from the Early Carboniferous to the Late Permian that includes the aistopods, the paraphyletic nectrideans, and possibly also Adelospondyli.
• For example, Marjanović & Laurin (2019) note that the original study reported only a Bayesian consensus and a majority-rule consensus tree of the main data matrix, and while both support the claimed caecilian affinities of Chinlestegophis jenkinsi, the strict parsimony consensus tree does not, given that it is compatible with lissamphibian monophyly (indeed, this topology is found in some of the most parsimonious trees); those workers generally favor and recover support for a monophyletic origin of lissamphibians from lepospondyls.
• These include Acanthostega, Icththyostega, colosteids (except for a vestigial intertemporal in Greererpeton), diadectomorphs, lepospondyls, and amniotes.
• Paired exoccipital condyles have convergently evolved in a number of crown-tetrapod lineages (lissamphibians, stereospondyls, some "lepospondyls", and mammals), none of which are related to Gaiasia.

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