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It does have it's own field it is called Entermology.
L. A. Borradaile has written:
'The animal and its environment'
'A manual of elementary zoology'
'The invertebrate'
Paul Allen Meglitsch has written:
'Invertebrate zoology' -- subject(s): Invertebrates
Malacology is branch of study within the area of invertebrate zoology. Specifically this branch deals with the study of aquatic mollusks.
No, It doesn't have a genus..
Scientific classificationKingdom:AnimaliaPhylum:ArthropodaClass:InsectaOrder:Lepidoptera(unranked):Heterocera