Prototheria are in the phylum subclass chordata.
The classification of the platypus is: Kingdom: Animalia Phylum: Chordata Class: Mammalia Subclass: Prototheria Order: Monotremata
Prototheria is the subclass containing the egg-laying mammals (the echidna and platypus). Metatheria is the subclass that encompasses marsupials and a few other now-extinct mammals that were not placental. The other subclass of mammals is Eutheria, which contains all placental mammals, which make up the majority of mammals.
Phylum: Chordata Class : Mammalia Order : Cetacea
Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Subclass: Elasmobranchii Superorder: Batoidea Order: Torpediniformes
Hirudinean is the Latin and scientific name for the Leech. Leehes belong to the subclass Hirudinea, in the phylum Annelida.
Leeches are classified in phylum Annelida because they have segmented bodies with repeated body segments. They also have a closed circulatory system and belong to the subclass Hirudinea within the phylum Annelida.
kingdom: Animalia. Phylum: Echinodermata. Class: Echinoidea. Subclass: Euechinoidea. Superorder: Gnathostomata. Order: Clypeasteroida.
If by biological you mean the phylogeny it's phylum mollusca, class bivalvia, subclass heterodonta
An anglerfish belongs to the Animalia kingdom, the chordata phylum, and the actinopterygil class. The angler fish also belongs to the subclass neopterygil.
Leeches belong to the class Hirudinea, which is a subclass of the phylum Annelida. They are segmented worms known for their blood-feeding behavior.
A leach is a blood sucking parasitic segmented worm that is found in fresh water. It is part of the Annedila phylum, subclass Hirudinea.
Genus and species is Clypeaster subdepressus