亜目 is read as あもく (amoku) and means suborder.
あもく
amoku
たしょくあもく
Polyphaga (suborder of beetles)
りすあもく
Sciuromorpha (suborder of rodents)
しんはんりゅうあもく
Eupelycosauria (suborder of pelycosaurs)
いぬあもく
Caniformia
うしあもく
Ruminantia
ねこあもく
Feliformia (Carnivora suborder including cats)
ねずみあもく
Myomorpha (suborder of rodents)
かせああもく
Caseasauria
すずきあもく
Percoidei (suborder of perch and perch-like fish)
やまあらしあもく
Hystricomorpha (suborder of rodents)
あなばすあもく
Anabantoidei (suborder of labyrinth fish)
きのどんあもく
Cynodontia