M. laeta may refer to:
- Marginella laeta, a margin snail
- Megachile laeta, a leafcutter bee
- Meromyza laeta, a grass fly
- Mimacraea laeta, an African butterfly
- Mitromorpha laeta, a sea snail
- Musurgina laeta, an owlet moth
- Myrmarachne laeta, an antmimicking spider
This disambiguation page lists articles associated with the same abbreviated species scientific name.
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