M. laeta

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