Adenophorea or Aphasmidia was a class of

nematode The nematodes ( or ; ; ), roundworms or eelworms constitute the phylum Nematoda. Species in the phylum inhabit a broad range of environments. Most species are free-living, feeding on microorganisms, but many are parasitic. Parasitic worms (h ...

s (roundworms). It has been by and large abandoned by modern

taxonomy image:Hierarchical clustering diagram.png, 280px, Generalized scheme of taxonomy Taxonomy is a practice and science concerned with classification or categorization. Typically, there are two parts to it: the development of an underlying scheme o ...

, because there is strong evidence for it being a motley

paraphyletic Paraphyly is a taxonomic term describing a grouping that consists of the grouping's last common ancestor and some but not all of its descendant lineages. The grouping is said to be paraphyletic ''with respect to'' the excluded subgroups. In co ...

group of unrelated lineages of roundworms.ToL (2002)

Description

Amphids of Adenophoreas are always post-labial and pore-like. Deirids are not seen in Adenophoreas. Phasmids are also generally absent in Adenophoreas. Adenophreas have uninucleate hypodermal glands. Adenophoreas'

excretory system The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism, so as to help maintain internal chemical homeostasis and prevent damage to the body. The dual function of excret ...

is simple and non-tubular when present. Adenophoreas commonly have three caudal glands. The opening is through a spinneret at the tail tip. Male Adenophoreas generally have two

testes A testicle or testis ( testes) is the gonad in all male bilaterians, including humans, and is homologous to the ovary in females. Its primary functions are the production of sperm and the secretion of androgens, primarily testosterone. The ...

. Caudal alae are rare in Adenophoreas. Male Adenophoreas have supplement glands situated in a single ventro-median row. Sensory papillae of Adenophoreas are in the

cephalic A head is the part of an organism which usually includes the ears, brain, forehead, cheeks, chin, eyes, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste. Some very simple animals may no ...

region and along the body. Generally, Adenophoreas have five

esophageal glands The esophageal glands are glands that are part of the digestive system of various animals, including humans. In humans In humans the glands are known as the esophageal submucosal glands and are a part of the human digestive system. They are a smal ...

. Adenophorea are either marine, freshwater or terrestrial or three of them together or any two of them. A number of these traits above are

plesiomorph In phylogenetics, a plesiomorphy ("near form") and symplesiomorphy are synonyms for an ancestral Phenotypic trait, character shared by all members of a clade, which does not distinguish the clade from other clades. Plesiomorphy, symplesiomorph ...

ic, and thus unsuitable to discern relationships.

Footnotes

References

* (2002)
Nematoda
Version of 2002-JAN-01. Retrieved 2008-NOV-02. {{Authority control Nematode taxa Obsolete animal taxa Ecdysozoa classes Paraphyletic groups

Description

See also

Footnotes

References