Annelida: Definition, Characteristics, Examples
The phylum Annelida is a group of organisms having ring-shaped segments. The term Annelida is derived from the Latin word; ” Annulus = ring “ There are more than 15000…
worms
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Aschelminthes: Definition, Characteristics, Examples
Aschelminthes is considered a superphylum, which includes many phyla. The term Aschelminthes was first introduced by Grobben in 1910. Earlier in 1859, Gegenbour was named Nemathelminthes for this phylum. So,…
Platyhelminthes: Definition, Characteristics, Examples
In 1859 the scientist Gegenbaur proposed the name phylum platyhelminthes. Originally the animals of this group were placed in the taxon vermis by Linnaeus in 1735 along with other worms.…