What is an example of a Sarcopterygii?

What is an example of a Sarcopterygii?

LungfishCoelacanthCoelacant…Eusthenop…Tetrapodo…Fringe‑finn… fish
Lobe-finned fish/Lower classifications

What is the difference between Sarcopterygii and Actinopterygii?

Sarcopterygii and actinopterygii are two major groups of osteichthyans, which include vertebrate bony fish. Most of these species are marine. Sarcopterygii are extinct organisms that have a pair of lobed fins. Actinopterygii, in contrast, have a pair of ray fins.

Where do lobe-finned fishes live?

For many years they were considered the only extant lobe-finned fishes until 1938, when a surviving member of the coelacanths, Latimeria chalumnae, was caught off the Comoro archipelago near the eastern coast of Africa in the Indian Ocean. A second species, Latimeria menadoensis, was discovered in 1999 in Indonesia.

Are mammals Sarcopterygii?

Since mammals are not included in the class Sarcopterygii, this class is considered a paraphyletic group. Mammals, for instance, remain in their own class mostly because of the history of classification.

What are characteristics of Sarcopterygii?

Sarcopterygians are characterised by their fleshy pectoral and pelvic (paired) fins that articulate with the pectoral (shoulder) and pelvic (hip) girdles via a single bone….Features:

• Muscular paired fleshy fins.
• Fins attached the pelvic and pectoral girdle by single basal bone.
• Teeth coated with enamel.

Are Sarcopterygii amphibians?

The group Tetrapoda, a superclass including amphibians, reptiles (including dinosaurs and therefore birds), and mammals, evolved from certain sarcopterygians; under a cladistic view, tetrapods are themselves considered a group within Sarcopterygii.

What are the characteristics of Sarcopterygii?

What are the characteristics of class Sarcopterygii?

annotated classification Subclass Sarcopterygii (lobe-finned fishes) Usually possess a choana; paired fins with a fleshy base over a bony skeleton; persisting notochord; 2 dorsal fins; nares are internal.

What characteristics S characterize the Sarcopterygii?

One of the most important characteristics of lobe-finned fish is the lobe in their fins. Unlike other fish, sarcopterygian fish has a cental appendage in their fins containing many bones and muscles. The fins are very flexible and potentially useful for supporting the body on land, as in lungfish and tetrapods.

How many living species are there in class Sarcopterygii?

Two living species are currently known. The dipnoans (lungfishes) also are well represented in the fossil record, but there are only six extant species, with the first living lungfish formally described in 1837 (Nelson 2006)….Sarcopterygii.