class phasmidia
Definition
- Noun:
- A taxonomic subgroup of nematodes: "Class Phasmidia" refers to one of two major subgroups within the phylum Nematoda (roundworms), used in certain biological classification systems. It is characterized by the presence of phasmids, which are small sensory organs.
Usage
- Noun:
- The Class Phasmidia includes many parasitic nematode species.
- In some taxonomic schemes, nematodes are divided into the Class Phasmidia and the Class Aphasmidia.
Advanced Usage
- Taxonomic Context: The term is primarily used in specialized zoological and parasitological literature when discussing nematode taxonomy and phylogeny.
- The evolutionary relationships within Class Phasmidia are complex and subject to ongoing research.
Variants and Related Words
- Phasmidia (n): Often used synonymously with "Class Phasmidia."
- Phasmid (n): The sensory organ that defines members of this class.
- Nematoda (n): The phylum to which this class belongs.
- Aphasmidia (n): The other major class of nematodes in this dichotomous classification, characterized by the absence of phasmids.
Synonyms
- Secernentea (n): A more modern and commonly used class name that largely corresponds to the historical grouping of Phasmidia.
Noun
-
one of two subgroups of Nematoda used in some classification systems
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