Ascaridina
Encyclopedia
The suborder Ascaridina contains the bulk of the Ascaridida
, parasitic roundworms with three "lips" on the anterior end. The Ascaridida were formerly placed in the subclass
Rhabditia
by some, but morphological and DNA sequence
data rather unequivocally assigns them to the Spiruria
. The Oxyurida
and Rhigonematida are occasionally placed in the Ascaridina as superfamily
Oxyuroidea, but while they seem indeed to be Spiruria, they are not as close to Ascaris
as such a treatment would place them.
These "worm
s" contain a number of important parasites of humans and domestic animals, namely in the superfamily
Ascaridoidea.
:
Ascaridida
The order Ascaridida includes several families of parasitic roundworms with three "lips" on the anterior end. They were formerly placed in the subclass Rhabditia by some, but morphological and DNA sequence data rather unequivocally assigns them to the Spiruria...
, parasitic roundworms with three "lips" on the anterior end. The Ascaridida were formerly placed in the subclass
Class (biology)
In biological classification, class is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, order, family, genus, and species, with class fitting between phylum and order...
Rhabditia
Rhabditia
Subclass Rhabditia is mostly composed of parasitic nematodes , though there are some free-living species as well...
by some, but morphological and DNA sequence
DNA sequence
The sequence or primary structure of a nucleic acid is the composition of atoms that make up the nucleic acid and the chemical bonds that bond those atoms. Because nucleic acids, such as DNA and RNA, are unbranched polymers, this specification is equivalent to specifying the sequence of...
data rather unequivocally assigns them to the Spiruria
Spiruria
Subclass Spiruria comprises mostly parasitic secernentean nematodes. In an alternate classification, they are treated as suborder Spirurina, with the orders listed here being ranked as infraorders....
. The Oxyurida
Oxyurida
Oxyurida is an order of nematode worms of the class Secernentea. It consists of four families, one of which contains the human pinworm ....
and Rhigonematida are occasionally placed in the Ascaridina as superfamily
Taxonomic rank
In biological classification, rank is the level in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories...
Oxyuroidea, but while they seem indeed to be Spiruria, they are not as close to Ascaris
Ascaris
Ascaris is a genus of parasitic nematode worms known as the "giant intestinal roundworms". One species, A. suum, typically infects pigs, while another, A. lumbricoides, affects human populations, typically in sub-tropical and tropical areas with poor sanitation. A...
as such a treatment would place them.
These "worm
Worm
The term worm refers to an obsolete taxon used by Carolus Linnaeus and Jean-Baptiste Lamarck for all non-arthropod invertebrate animals, and stems from the Old English word wyrm. Currently it is used to describe many different distantly-related animals that typically have a long cylindrical...
s" contain a number of important parasites of humans and domestic animals, namely in the superfamily
Taxonomic rank
In biological classification, rank is the level in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, and class. Each rank subsumes under it a number of less general categories...
Ascaridoidea.
Systematics
The Ascaridina contain the following superfamilies and familiesFamily (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
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