Which animal belongs to the class Oligochaeta?

ClitellataEarthworms / ClassThe Clitellata are a class of annelid worms, characterized by having a clitellum – the ‘collar’ that forms a reproductive cocoon during part of their life cycles. The clitellates comprise around 8,000 species. Unlike the class of Polychaeta, they do not have parapodia and their heads are less developed. Wikipedia

What are the characteristics of class Oligochaeta?

Characteristics of Oligochaeta Oligochaete worms have long, segmented, tubular bodies, giving them the appearance of a piece of thick spaghetti. They can range in length from just a few millimeters to over 10 feet!

What are examples of Hirudinea?

Hirudinea (Leeches) The Hirudinea, or true leeches, are highly specialized clitellates, separated from other annelid groups by the presence of an anterior circumoral sucker and a posterior ventral sucker. They represent a relatively small monophyletic group of annelids.

Where are Oligochaeta found?

Oligochaetes are common all over the world. They live in the sea, in fresh water, and in moist soil.

How many species of Oligochaeta are there?

With around 10,000 known species, the Oligochaeta make up about half of the phylum Annelida.

Is earthworm an Oligochaeta?

oligochaete, any worm of the subclass Oligochaeta (class Clitellata, phylum Annelida). About 3,500 living species are known, the most familiar of which is the earthworm (q.v.), Lumbricus terrestris. Oligochaetes are common all over the world.

Do leeches have Annuli?

In zoology, an annulus is an external circular ring. Annuli are commonly found in segmented animals such as earthworms and leeches. The bodies of these annelids are externally marked by annuli that are arranged in series with each other.

What organisms are in class Hirudinea?

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.

Do leeches have annuli?

Which animal belongs to the class Oligochaeta quizlet?

Earthworms belong to the (Hirudinea, Oligochaeta, Polychaeta, Trematoda) class, which is the most common class of segmented worms.

What is the habitat of Oligochaeta?

Aquatic oligochaetes, like Tubifex, live in the bottom sediment of freshwater habitats; some are amphibious and live in marshes and bogs. A few species occur in the intertidal zones of the sea living in sea-weeds, below rocks or as shallow burrowers.

What is the classification of oligochaete?

Oligochaete, any worm of the subclass Oligochaeta (class Clitellata, phylum Annelida). About 3,500 living species are known, the most familiar of which is the earthworm (q.v.), Lumbricus terrestris. Oligochaetes are common all over the world. They live in the sea, in fresh water, and in moist soil.

Are oligochaetes hermaphrodites?

The class Oligochaeta (phylum Annelida) contains a diversity of both aquatic and terrestrial worms, among which is the familiar earthworm, Lumbricus. Although some aquatic oligochaetes reproduce asexually, the majority are sexual, and all of these are hermaphrodites. At mating, two oligochaetes lie side by side so that….

What are the characteristics of aquatic oligochaetes?

The majority of aquatic oligochaetes are small, slender worms, whose organs can be seen through the transparent body wall. They burrow into the sediment or live among the vegetation mostly in shallow, freshwater environments.

What are oligochaetes sensu stricto?

Oligochaetes sensu stricto (=s.s.) are the most diverse and widely distributed group of annelids in all kinds of terrestrial and aquatic habitats. To date, approximately 5000 valid species of oligochaetes are described worldwide, of which about 1100 live in freshwaters. They represent more than 30 families of which about 23 occur in freshwaters.