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Komarekiona eatoni, or the Kentucky earthworm, is a terrestrial species of nearctic Annelid found in the southwestern United States, especially near the Appalachian Mountains.
The annelids (/ ˈ æ n ə l ɪ d z /), also known as the segmented worms, comprise a large phylum called Annelida (/ ə ˈ n ɛ l ɪ d ə /; from Latin anellus 'little ring'). [ 3 ] [ a ] The phylum contains over 22,000 extant species , including ragworms , earthworms , and leeches .
The family comprises marine annelids distributed in diverse benthic habitats across Oceania, Europe, South America, North America, Asia and Africa. [1] The Eunicid anatomy typically consists of a pair of appendages near the mouth ( mandibles ) and complex sets of muscular structures on the head ( maxillae ) in an eversible pharynx . [ 2 ]
The Devonian Websteroprion is the largest known fossil eunicidan annelid, with estimated length 1–2 m (3 ft 3 in – 6 ft 7 in). [3] It also had the biggest scolecodonts of any prehistoric polychaete , up to 13.2 mm (0.52 in) in length and possibly larger.
Pleistoannelida is a group of annelid worms that comprises the vast majority of the diversity in phylum Annelida.Discovered through phylogenetic analyses, it is the largest clade of annelids, comprised by the last common ancestor of the highly diverse sister groups Errantia and Sedentaria (Clitellata and related polychaetes) and all the descendants of that ancestor.
Errantia is a diverse group of marine polychaete worms in the phylum Annelida. Traditionally a subclass of the paraphyletic class Polychaeta, [4] it is currently regarded as a monophyletic group within the larger Pleistoannelida, composed of Errantia and Sedentaria. [2] These worms are found worldwide in marine environments and brackish water.
The Aeolosomatidae is a family of very small, aquatic annelid worms, between 0.3 and 10 mm in length and 0.04-0.06 mm in diameter. About 30 species have been described in three genera . [ 2 ] These worms are known as suction-feeding worms and occupy freshwater, brackish, and saltwater habitats.
Hediste diversicolor, commonly known as a ragworm, is a polychaete worm in the family Nereididae.It lives in a burrow in the sand or mud of beaches and estuaries in intertidal zones in the north Atlantic.