Phoronis
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Phoronis is one of the two genera of the horseshoe worm family (Phoronidae), in the phylum Phoronida. The body has two sections, each with its own coelom. There is a specialist feeding structure, the lophophore, which is an extension of the wall of the coelom and is surrounded by tentacles. The gut is U-shaped. The diagnostic feature that distinguishes this genus is the lack of epidermal invagination at the base of the lophophore. These worms are filter feeders. They live on hard substrates or soft sediments in marine environments throughout the world. They have different modes of reproduction which help with their success. The scientific name of the larval form is Actinotrocha.
Phoronis is one of the two genera of the horseshoe worm family (Phoronidae), in the phylum Phoronida. The body has two sections, each with its own coelom. There is a specialist feeding structure, the lophophore, which is an extension of the wall of the coelom and is surrounded by tentacles. The gut is U-shaped. The diagnostic feature that distinguishes this genus is the lack of epidermal invagination at the base of the lophophore. These worms are filter feeders. They live on hard substrates or soft sediments in marine environments throughout the world. They have different modes of reproduction which help with their success. The scientific name of the larval form is Actinotrocha. ==Etymology== The generic name refers to Phoronis (better known as Io), a Greek mythological character sometimes conflated with Isis. Thomas Strethill Wright, of Edinburgh, did not give a specific reason for choosing the name. ==Species== Phoronis australis Haswell 1883 Phoronis embryolabi Temereva & Chichvarkhin, 2017 Phoronis emigi Hirose et al. 2014 Phoronis hippocrepia Wright 1856 Phoronis ijimai Oka 1897 Phoronis muelleri Selys-Lonchamps 1903 Phoronis ovalis Wright 1856 Phoronis pallida (Schneider 1862) Silén 1952 Phoronis psammophila Cori 1889 Phoronis savinkini Temereva & Neklyudov, 2018 Phoronis architecta is no longer accepted and is considered to be a synonym of Phoronis psammophila. Similarly Phoronis vancouverensis is considered to be a synonym of Phoronis ijimai. A 2018 phylogenetic analysis indicates that Phoronis is paraphyletic, while Phoronopsis is a monophyletic genus. ==References==
Text derived from https://en.wikipedia.org/w/index.php?oldid=1366219380 under CC BY-SA 4.0; modifications have been made.