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Eucestoda, commonly referred to as tapeworms, is the larger of the two subclasses of flatworms in the class Cestoda (the other subclass is Cestodaria). Larvae have six posterior hooks on the scolex (head), in contrast to the ten-hooked Cestodaria. All tapeworms are endoparasites of vertebrates, living in the digestive tract or related ducts.
An earthworm is a soil -dwelling terrestrial invertebrate that belongs to the phylum Annelida. The term is the common name for the largest members of the class (or subclass, depending on the author) Oligochaeta. In classical systems, they were in the order of Opisthopora since the male pores opened posterior to the female pores, although the ...
In biology, "worm" refers to an obsolete taxon, Vermes, used by Carolus Linnaeus and Jean-Baptiste Lamarck for all non- arthropod invertebrate animals, now seen to be paraphyletic. The name stems from the Old English word wyrm. Most animals called "worms" are invertebrates, but the term is also used for the amphibian caecilians and the slowworm ...
Nematode. Nemata Cobb, 1919 emend. The nematodes (/ ˈnɛmətoʊdz / NEM-ə-tohdz or NEEM-; Greek: Νηματώδη; Latin: Nematoda), roundworms or eelworms constitute the phylum Nematoda. [ 3 ][ 4 ] They are a diverse animal phylum inhabiting a broad range of environments. Most species are free-living, feeding on microorganisms, but many ...
Synonyms. Lumbriculus kareliensis Popčhenko, 1976. Lumbriculus variegatus, also known as the blackworm or California blackworm or Australian Blackworm, is a species of worm inhabiting North America Europe and Australia. It lives in shallow-water marshes, ponds, and swamps, feeding on microorganisms and organic material.
Earthworm head. Lumbricus terrestris is relatively large, pinkish to reddish-brown in colour, generally 110–200 millimetres (4.3–7.9 in) in length and about 7–10 millimetres (0.28–0.39 in) in diameter. It has around 120–170 segments, often 135–150. The body is cylindrical in the cross section, except for the broad, flattened ...
Caenorhabditis elegans (/ ˌsiːnoʊræbˈdaɪtəs ˈɛləɡæns / [6]) is a free-living transparent nematode about 1 mm in length [7] that lives in temperate soil environments. It is the type species of its genus. [8] The name is a blend of the Greek caeno- (recent), rhabditis (rod-like) [9] and Latin elegans (elegant).
Nemertea is a phylum of animals also known as ribbon worms or proboscis worms, consisting of about 1300 known species. [ 2 ][ 3 ] Most ribbon worms are very slim, usually only a few millimeters wide, although a few have relatively short but wide bodies. Many have patterns of yellow, orange, red and green coloration.