Overview
The Chromadoria are a subclass of the class , (belonging to the phylum Nematoda - roundworms). Members of this subclass' bodies usually have annules, their amphids elaborate and spiral, and they all have three esophageal glands. They usually live in marine sediments, although they can live elsewhere. They have more sophisticated pharynxs than most roundworms.
Photos
Taxonomy
The Subclass Chromadoria is a member of the Class Adenophorea. Here is the complete "parentage" of Chromadoria:
- Domain: Eukaryota
Whittaker & Margulis,1978 - eukaryotes
- Kingdom: Animalia
Linnaeus, 1758 - animals
- Subkingdom: Bilateria
(Hatschek, 1888) Cavalier-Smith, 1983 - bilaterians
- Branch: Protostomia
Grobben, 1908 - protostomes
- Infrakingdom: Ecdysozoa
Aguinaldo Et Al., 1997 Ex Cavalier-Smith, 1998 - ecdysozoans
- Superphylum: Aschelminthes
- Phylum: Nematoda
(Rudolphi, 1808) Lankester, 1877 - Round Worms
- Class: Adenophorea
- Subclass: Chromadoria
- Class: Adenophorea
- Phylum: Nematoda
(Rudolphi, 1808) Lankester, 1877 - Round Worms
- Superphylum: Aschelminthes
- Infrakingdom: Ecdysozoa
Aguinaldo Et Al., 1997 Ex Cavalier-Smith, 1998 - ecdysozoans
- Branch: Protostomia
Grobben, 1908 - protostomes
- Subkingdom: Bilateria
(Hatschek, 1888) Cavalier-Smith, 1983 - bilaterians
- Kingdom: Animalia
Linnaeus, 1758 - animals
The Subclass Chromadoria is further organized into finer groupings including:
- Order (5): Araeolaimida · Chromadorida · Desmodorida · Desmoscolecida · Monhysterida
Orders
Araeolaimida
Chromadorida
Desmodorida
Desmoscolecida
Desmoscolecida is an order of marine . In a worm of this order, the body tapers towards each end and is marked by a number of well-defined ridges. Their number varies in the different species. The head bears four movable setae, and some of the ridges bear a pair either dorsally or ventrally. Two pigment spots between the fourth and fifth ridges are regarded as eyes. The Desmoscolecida move by looping their bodies like geometrid caterpillars or leeches, as well as by creeping on their setae. The mouth is terminal, and leads into a muscular oesophagus which opens into a straight intestine terminating in an anus, which is said to be dorsal in position. The sexes are distinct. The testis is single, and its duct opens into the intestine and is provided with two chitinous spicules. The ovary is also single, opening independently and anterior to the anus. The nervous system is as yet unknown. [more]
Monhysterida
The Monhysterida are an in the phylum Nematoda. Usually the stoma in Monhysterida is funnel shaped and lightly cuticularized, but it is sometimes spacious and heavily cuticularized and they always have protrusible teeth. They are either simply spiral or circular. [more]
At least 753 species and subspecies belong to the Order Monhysterida.
More info about the Order Monhysterida may be found here.
Sources
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