What classes are in phylum Annelida?
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Most authors accept the annelids as having three major classes: Polychaeta, Oligochaeta, and Hirudinea.
What are the 2 main groups of annelids?
For the purposes of this concept, we will consider two main classes of annelids: Polychaetae and Clitellata. The Clitellata are characterized by the presence of a specialized reproductive organ called the clitellum.
What are the four major groups of Annelida?
The annelids /ˈænəlɪdz/ (Annelida /əˈnɛlɪdə/, from Latin anellus, “little ring”), also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches….Annelid.
| Annelida Temporal range: | |
|---|---|
| Phylum: | Annelida Lamarck, 1809 |
| Classes and subclasses |
What are the 7 levels of classification for a earthworm?
The seven categories of biological taxonomy are Kingdom, Phylum, Class, Order, Family, Genus and Species.
What are 5 characteristics of phylum Annelida?
Characteristics of Annelida
- The Annelids are coelomate and triploblastic.
- They exhibit organ system level organization.
- Their body is segmented.
- They respire through their body surface.
- Nephridia are the excretory organs.
- They have a well-developed circulatory and digestive system.
How many species are in phylum Annelida?
9000 species
Annelids can be told by their segmented bodies. Polychaetes (meaning “many bristles”) have, predictably, many bristles on the body, while earthworms and leeches have fewer bristles. There are about 9000 species of annelid known today.
Which classes of annelids have a clitellum?
Annelids with a clitellum (a swelling towards the head of the animal, where the gonads are located) are classified in the Clitellata, which is further divided into Hirudinea (leeches) and Oligochaeta (including the earthworms).
How many species are in the phylum Annelida?
Annelids can be told by their segmented bodies. Polychaetes (meaning “many bristles”) have, predictably, many bristles on the body, while earthworms and leeches have fewer bristles. There are about 9000 species of annelid known today.
What is the phylum of an earthworm?
AnnelidEarthworm / Phylum
Is earthworm a phylum or class?
| Earthworm | |
|---|---|
| Phylum: | Annelida |
| Class: | Clitellata |
| Order: | Opisthopora |
| Suborder: | Lumbricina |
How many Annelida species are there?
There are about 9000 species of annelid known today.
Which one of these is the primary characteristic of phylum Annelida?
So the correct answer is ‘Metameric segmentation’.
Which animals belong to the Annelida phylum?
Earthworm.
What are the classes of annelids?
Class Polycheta
What are some common examples of phylum Annelida?
(1) Polychaeta Examples:Nereis (sandworm),Chaetopterus (paddle worm),Aphrodite (sea mouse),Polynoe (scale worm),etc.
Which phylum is most closely related to Annelida?
Two phyla placed side by side in the system like Ctenophora and Platyhelminthes, Annelida and Arthropoda, Mollusca and Echinodermata are more closely related than two phyla separated by one or more phyla like Echinodermata and Chordata. Which phylums are closely related?