annelid

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annelid

(ăn′ə-lĭd)
n.
Any of various worms or wormlike animals of the phylum Annelida, characterized by an elongated, cylindrical, segmented body and including the earthworms and the leeches.

an·nel′i·dan (ə-nĕl′ĭ-dən) adj.

annelid

a member of the animal phylum Annelida, a group containing the segmented worms, e.g. earthworms, polychaete worms and leeches. Annelids are characterized by the presence of METAMERIC SEGMENTATION, a COELOM, well-developed blood and nervous systems, and NEPHRIDIA.
References in periodicals archive ?
Specimens from the pretrilobite Lower Cambrian of the Ukraine as well as from the trilobite-bearing Lower Cambrian of Nevada have been assigned tentatively to the phylum Annelida Lamark, 1809 and class Polychaeta Grube, 1850.
El phylum Mollusca presento el mayor numero de especies con 11, seguido del phylum Echinodermata con tres especies, luego la superclase Crustacea con dos especies y una familia indeterminada, el phylum Cnidaria con una especie y el phylum Annelida con una familia indeterminada
Polychaetes form the most important class in the Phylum Annelida. Of the 83 families of known polychaetes (Rouse & Pleijel, 2001), only the Tomopteridae, Alciopidae, Lopadorhynchidae, Iospilidae, Typhloscolecidae, and Pontodoridae are exclusively pelagic (Fauchald, 1977; Stop-Bowitz,1981).
(Medusae) Phylum Ctenophora Mnemiopsis leidyi Phylum Annelida Class Polychacta Platynereis sp.
Others place frenulates and vestimentiferans within the phylum Annelida (Land and N[phi]rrevang, 1977; Kojima et al., 1993; Bartolomaeus, 1995; McHugh, 1997; Rouse and Fauchald, 1997; also see Southward, 1988).