Rhabdopleurida Temporal range:
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Rhabdopleura normani | |
Scientific classification | |
Kingdom: | |
Phylum: | |
Class: | |
Subclass: | |
Order: | Rhabdopleurida
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Family: | Rhabdopleuridae Allman, 1869
[1]
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Genera | |
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Synonyms | |
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Rhabdopleurida is one of three orders in the class Pterobranchia, which are small, worm-shaped animals, are the only surviving graptolites. Members belong to the hemichordates. [2] [3] Species in this order are sessile, colonial, connected with a stolon, living in clear water and secrete tubes called tubarium. They have a single gonad, the gill slits are absent and the collar has two tentaculated arms. [4] Rhabdopleura is the best studied pterobranch in developmental biology. [5] Rhabdopleura is the only extant graptolite. [6] [7]
This small order is monotypic. It has only a single extant genus, containing four to six living species.
Order Rhabdopleurida Fowler, 1892
Extinct species:
Rhabdopleurida Temporal range:
| |
---|---|
Rhabdopleura normani | |
Scientific classification | |
Kingdom: | |
Phylum: | |
Class: | |
Subclass: | |
Order: | Rhabdopleurida
|
Family: | Rhabdopleuridae Allman, 1869
[1]
|
Genera | |
| |
Synonyms | |
|
Rhabdopleurida is one of three orders in the class Pterobranchia, which are small, worm-shaped animals, are the only surviving graptolites. Members belong to the hemichordates. [2] [3] Species in this order are sessile, colonial, connected with a stolon, living in clear water and secrete tubes called tubarium. They have a single gonad, the gill slits are absent and the collar has two tentaculated arms. [4] Rhabdopleura is the best studied pterobranch in developmental biology. [5] Rhabdopleura is the only extant graptolite. [6] [7]
This small order is monotypic. It has only a single extant genus, containing four to six living species.
Order Rhabdopleurida Fowler, 1892
Extinct species: