What is the class Hirudinea in the phylum Annelida?

What is the class Hirudinea in the phylum Annelida?

The class Hirudinea in the phylum Annelida (segmented worms) comprises the leeches, the most highly specialized of the major annelid groups. Leeches are typically dorsoventrally flattened annelids with suckers at both ends and 34 body segments (designated I-XXXIV) which are externally divided into a number of annuli.

What is the classification of annelida?

Annelida
Annelid/Scientific names

What are the 3 classes in phylum Annelida?

Most authors accept the annelids as having three major classes: Polychaeta, Oligochaeta, and Hirudinea. Older systems would place the polychaetes and oligochaetes under the class Chaetopoda because both groups possess setae.

What organisms are in the class Hirudinea?

Annelida: Class Hirudinea. Enter your search terms: This class includes the 500 species of leeches, flattened, predacious or parasitic annelids equipped with suckers used for creeping. Leeches range in length from about 1⁄2 in. to 8 in.

Who named Annelida first?

CSS :: Phylum Annelida

What are 3 characteristics of annelids?

Characteristics of Phylum Annelida

• They have a long and segmented body.
• Annelids are bilaterally symmetrical.
• They are triploblastic.
• Also, they exhibit organ system grade of organisation, showing organ differentiation.
• The body is covered with a thin cuticle.
• They are coelomate.

What does Hirudinea mean?

: a class of hermaphroditic aquatic, terrestrial, or parasitic annelid worms distinguished by a coelom nearly obliterated by connective tissue and reduced to a series of vascular sinuses, by modification of the hindmost segments into a sucking disk, and by the absence of parapodia and setae.