A. crenulatus may refer to: Abacetus crenulatus, a ground beetle found in West Africa Acus crenulatus, a synonym of Oxymeris crenulata, a sea snail found in the Red Sea and the Indian and Pacific Oceans Adeuomphalus crenulatus, a sea snail found off New Zealand Arctus crenulatus, a synonym of Scyllarus arctus, a slipper lobster found in the Mediterranean Sea and the eastern Atlantic Ocean