Orthaea may refer to:
* , mythological Greek character
*
''Orthaea'' (bug), a genus of true bugs in the family
Rhyparochromidae
The Rhyparochromidae are a large family (biology), family of true bugs (order Hemiptera). Many species under Rhyparochromidae are commonly referred to as seed bug (disambiguation), seed bugs, as are other species within the wider Pentatomomorpha ...
*
''Orthaea'' (plant), a genus of plants in the family Ericaceae
* ''Orthaea'', a genus of beetles in the family
Chrysomelidae
The beetle family Chrysomelidae, commonly known as leaf beetles, includes over 37,000 (and probably at least 50,000) species in more than 2,500 genera, making it one of the largest and most commonly encountered of all beetle families. Numerous s ...
, synonym of ''
Euphitrea''
{{Disambiguation, genus