Search results
Results from the WOW.Com Content Network
Starfish are included in the subphylum Asterozoa, the characteristics of which include a flattened, star-shaped body as adults consisting of a central disc and multiple radiating arms. The subphylum includes the two classes of Asteroidea, the starfish, and Ophiuroidea, the brittle stars and basket stars.
The Asteriidae are a diverse family of Asteroidea (sea stars) in the order Forcipulatida. It is one of three families in the order Forcipulatida. The oldest unambiguous fossils of the family date to the Late Cretaceous. [2]
1 Description and characteristics. 2 Selected genera. 3 References. ... The Oreasteridae are a family of sea stars in the class Asteroidea. Description and ...
This family comprises about 21 genera and 116 species according to O'Loughlin & Waters (2004), [3] whereas the World Asteroidea Database states that it includes 150 species in 25 genera. [1] Genera included in the family according to the World Asteroidea Database: [1] Ailsastra O'Loughlin & Rowe, 2005; Allopatiria Verrill, 1913; Anseropoda ...
The common starfish, common sea star or sugar starfish (Asterias rubens) is the most common and familiar starfish in the north-east Atlantic.Belonging to the family Asteriidae, it has five arms and usually grows to between 10–30 cm across, although larger specimens (up to 52 cm across) are known.
The Asterozoa are a subphylum in the phylum Echinodermata, within the Eleutherozoa.Characteristics include a star-shaped body and radially divergent axes of symmetry. The subphylum includes the classes Asteroidea (the starfish or sea stars), Ophiuroidea (the brittle stars and basket stars), Somasteroidea (early asterozoans from which the other classes most likely evolved), and Stenuroidea ...
Asterias is a genus of the Asteriidae family of sea stars.It includes several of the best-known species of sea stars, including the common starfish, Asterias rubens, and the northern Pacific seastar, Asterias amurensis.
Class: Asteroidea: Order: Valvatida: Family: Goniasteridae Forbes, 1841: Genera See text Goniasteridae (the biscuit stars) constitute the largest family of sea stars ...