What is the difference between Oligochaeta and Polychaeta?
The main difference between polychaetes and oligochaetes is that the polychaetes have a pair of parapodia per body segment that bear many bristles. But, oligochaetes have few bristles on their outer surface of the body but, no parapodia.
What is difference between Polychaeta Oligochaeta and Hirudinea?
Segmented worms of the phylum Annelida are divided into three classes: Polychaeta (marine polychaete worms), Pogonophora (beard worms), and Clitellata (divided into the subclasses Oligochaeta, which includes earthworms and freshwater worms, and Hirudinea, which includes leeches).
What is the difference between leeches and polychaetes?
Polychaetes are the most diverse group of annelids and most live in the marine environment. They differ from earthworms and leeches in that they have appendages called parapodia and do not possess a clitellum.
What is the meaning of Oligochaeta?
oligochaete. / (ˈɒlɪɡəʊˌkiːt) / noun. any freshwater or terrestrial annelid worm of the class Oligochaeta, having bristles (chaetae) borne singly along the length of the body: includes the earthworms. adjective.
Why are earthworms classified as Oligochaeta?
The term ‘Earthworm’ is a collective name for a group of organisms within the class Oligochaeta which means ‘few bristles’. Oligochaeta is a class in the phylum Annelida which means ‘little ring’, these little rings refers to segments found on all Annelids.
What differentiates polychaetes from other annelids?
Polychaetes differ from other annelids in having a well differentiated head with specialized sense organs and no clitellum. They have many setae, usually arranged in bundles on the parapodia. The head bears eyes, antennae, and sensory palps.
What are the characteristics of Hirudinea?
Leeches: Class Hirudinea.
What are examples of Hirudinea?
leech, (subclass Hirudinea), any of about 650 species of segmented worms (phylum Annelida) characterized by a small sucker, which contains the mouth, at the anterior end of the body and a large sucker located at the posterior end. All leeches have 34 body segments.
What is the difference between leech and earthworm?
Leech and earthworm both belong to the same phylum Annelida….Earthworm:
| Leech | Earthworm |
|---|---|
| They are small and flat as compared to earthworms. | They are longer and round in structure as compared to leeches. |
| They inhabit a wide of habitats such as freshwater, marine and terrestrial ecosystems. | They mostly live in the soil. |
What are the 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! You won’t find a head or any limbs on these guys either, but they can still get around pretty well by peristalsis.
What are characteristics of Oligochaeta?
What are the characteristics of class Polychaeta?
Polychaetes usually have a well-developed head, often complete with well-developed eyes, antennae, and sensory palps. They lack any permanent sex organs (in contrast to other kinds of annelids); gonads appear as swellings during the breeding season.
What is the difference between polychaetes and oligochaetes?
The main difference between polychaetes and oligochaetes is that the polychaetes have a pair of parapodia per body segment that bear many bristles. Characteristics of Free-Living Polychaetes. (1 cm–20 cm); most are under 2 in.
What is the difference between Polychaeta Oligochaeta and Hirudinea?
Include earthworms that are generally marine, while oligochaetes include earthworms that are aquatic and terrestrial Annelida – Polychaeta., Archiannelida ) bristles, mostly marine, freshwater and terrestrial differences between polychaeta oligochaeta and hirudinea in the phylum are classes.
What is Oligochaeta?
The subclass Oligochaeta contains all the animals commonly thought of as ‘earthworms’. Long thin worms with no obvious appendages to their bodies and greatly reduced heads so that when the animal is still it is not sometimes obvious which end is the head and which is the tail.
What is the classification of Polychaeta?
class Polychaeta 3. class Hirudinea. dioecious with temporary or seasonal gonads. ANNELIDA. Each body segment has a pair of fleshy protrusions called parapodia that bear many bristles, called chaetae, which are made of chitin.More than 10,000 species are described in this class.
