What are nematodes classified as?

Commonly known as roundworms, nematodes are a group of worms that make up the phylum Nematoda. With well over 15,000 species identified today, they can be found in different habitats ranging from terrestrial to marine environments.

Which of the following are characteristics of the class Adenophorea?

Characteristics supposed to distinguish Adenophorea are:

• amphids always post-labial, shape, pore-like to elaborate.
• deirids are not seen.
• phasmids are generally absent.
• hypodermal glands present (excretory?)
• simple non-tubular excretory system when present.

What is the difference between the class Adenophorea and Secernentea?

The phylum Nematoda is divided into two classes, Adenophorea and Secernentea. Most Adenophorea are non-parasitic. Free-living nematodes generally feed on bacteria, fungi, and protozoans. Secernentea are almost all parasitic and primarily terrestrial.

What class do roundworms belong to?

Nematode

What are the two types of nematodes?

The two nematode classes, the Chromadorea and Enoplea, have diverged so long ago, over 550 million years, that it is difficult to accurately know the age of the two lineages of the phylum (Figure 1). Figure 1. Nematodes are multicellular animals in the group Ecdysozoa, or animals that can shed their cuticle.

Is nematoda and Aschelminthes same?

The Aschelminthes (also known as Aeschelminthes, Nemathelminthes, Nematodes), closely associated with the Platyhelminthes, are an obsolete phylum of pseudocoelomate and other similar animals that are no longer considered closely related and have been promoted to phyla in their own right.

What is the scientific name for Enoplea?

Enoplea
Enoplea/Scientific names

Is Nematoda and Aschelminthes same?

What is the classification of a flatworm?

Platyhelminthes
Flatworm/Scientific names

What is Nematoda also called?

Nematode, also called roundworm, any worm of the phylum Nematoda. Nematodes are among the most abundant animals on Earth.

Why Aschelminthes are called Pseudocoelomates?

Aschelminthes are called pseudocoelomates because they do not possess true coelom. The mesoderm is present as scattered pouches between ectoderm and endoderm instead of lining the body cavity as in true coelom.

What is the scientific name for roundworm?

Nematoda
Roundworms/Scientific names

What are the 2 sub-classes of Adenophorea?

Adenophorea (2 sub-classes) Sub-class: Enoplia- 1. amphidsnot elaborate, oval, stirrup or pouch-like. 2. no body annuli. 3. cephalic sensory organs and somatic setaepresent or absent. 4. cylindrical esophagus, sometimes larger posteriorly. 5. five or more esophageal glands.

What are the characteristics of an Adenophorea nematode?

Adenophorea or Aphasmidia was a class of nematodes (roundworms). It has been by and large abandoned by modern taxonomy, because there is strong evidence for it being a motley paraphyletic group of unrelated lineages of roundworms. Characteristics supposed to distinguish Adenophorea are: amphids always post-labial, shape, pore-like to elaborate.

How many species of adenophoreans are there in the world?

The total number of species of adenophoreans is estimated at about 12,000 worldwide. Scientific surveys of seabed mud, along with other reliable evidence, suggest that a great number of species are yet-to-be discovered. The majority of adenophoreans are free-living, microbotrophic, and aquatic nematodes.

Where are the bursae located in the Adenophorea?

Male adenophoreans sometimes have thin cuticle extensions on both sides of the anus called bursae, which are fluid-filled body sacs. When present, bursae are used to hold females during copulation. Male testes, when present, are two in number and are shaped similar to the female ovary. The spicules, the male copulatory organ, are paired.