Roundworms: Phylum Nematoda. Species in the phylum Nematoda (from the Greek root word nema meaning thread) are better known as the roundworms (Fig. 3.41). There are about 25,000 species of nematodes formally described by scientists.
What phylum are roundworms and hookworms?
The nematodes (/ˈnɛmətoʊdz/ NEM-ə-tohdz or /ˈniːm-/ NEEM- Greek: Νηματώδη; Latin: Nematoda) or roundworms constitute the phylum Nematoda (also called Nemathelminthes), with plant-parasitic nematodes also known as eelworms. They are a diverse animal phylum inhabiting a broad range of environments.
Are roundworms in the phylum Arthropoda?
The presence of an exoskeleton suggests, surprisingly, that phylum Nematoda (the roundworms) is more closely related to the Phylum Arthropoda (the arthropods) than to the other worm phyla.
What class do most roundworms belong to?
Members / ClassesOther Info*Nematodes, also known as roundworms *Class Enoplea *Class Chromadorea*Nematodes can be found everywhere except in dry locations *Over 25,000 known species *Most are microscopic and can be free-living or parasitic
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