Information om | Engelska ordet TETRAPODOMORPHS

Exempel på hur man kan använda TETRAPODOMORPHS i en mening

• Acanthostega is seen as part of widespread evolutionary radiation in the late Devonian period, starting with purely aquatic finned tetrapodomorphs, with their successors showing increased air-breathing capability and related adaptions to the jaws and gills, as well as more muscular neck allowing freer movement of the head than fish have, and use of the fins to raise the body of the fish.
• Eusthenopteron, like other tetrapodomorph fishes, had internal nostrils (or a choana), one of the defining traits of tetrapodomorphs, including tetrapods.
• In the first tetrapodomorphs (~415 mya) the excurrent nostrils migrated to the edge of the mouth, occupying a position between the maxillary and premaxillary bones, directly below the lateral rostral (a bone that vanished in early tetrapods).
• In later tetrapodomorphs, including tetrapods, the excurrent nostril is positioned inside the mouth, where it is known as the choana.
• Keraterpeton is an extinct genus of "nectridean" tetrapodomorphs, previously included within the monotypic Keraterpedontidae family, from the Carboniferous period of Europe (Czech Republic, England and Ireland) and North America (United States); it is the oldest known member of the family Diplocaulidae.
• The Diplocaulidae ("double cauls") is an extinct family of "nectridean" tetrapodomorphs that arose during the Late Carboniferous and died out in the Late Permian.
• Some tristichopterids share some of the features of the elpistostegalians, a diverse clade of tetrapodomorphs close to the origin of (and including) tetrapods.
• The debate was further complicated by the fact that lungfishes, another group of sarcopterygian fish, also possess a choana with a different form to that of tetrapodomorphs.
• Rhizodus (root tooth) is an extinct genus of basal, finned tetrapodomorphs (the group of sarcopterygians that contains modern tetrapods and their extinct relatives).
• Elpistostege is an extinct genus of finned tetrapodomorphs that lived during the Frasnian age of the Late Devonian epoch.
• Eusthenodon (Greek for “strong-tooth” – eusthenes- meaning “strong”, -odon meaning “tooth”) is an extinct genus of tristichopterid tetrapodomorphs from the Late Devonian period, ranging between 383 and 359 million years ago (Frasnian to Famennian).
• Livoniana is a genus of prehistoric tetrapodomorphs which lived during the Devonian period (Givetian - Frasnian stages, about 374 - 391 million years ago).
• Notorhizodon is an extinct genus of tristichopterid tetrapodomorphs which lived during the Devonian period (Givetian stage, about 385 - 391 million years ago).
• Stegocephalians include both the modern lineage of limbed vertebrates (the crown group tetrapods, including modern amphibians, reptiles, birds and mammals) as well as a portion of the stem group, the earliest limbed tetrapodomorphs such as Ichthyostega and Acanthostega, which evolved in the Devonian period long before the origin of the crown group.
• Ectosteorhachis is an extinct genus of megalichthyid tetrapodomorphs that lived during the Permian period (Cisuralian epoch, about 299 to 272 million years ago).
• embryi, including Asterolepis, several large tetrapodomorphs, dipnoans, and another small undescribed holoptychiid.
• The sarcopterygians apparently took two different lines of descent and are accordingly separated into two major groups: the Actinistia (including the coelacanths) and the Rhipidistia (which include extinct lines of lobe-finned fishes that evolved into the lungfish and the tetrapodomorphs).
• Similar genera such as Psarolepis and Guiyu have sharp fangs on their five coronoids while poroplepiformes and tetrapodomorphs have tusk-like teeth and three coronoids.

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