Complex sentence: A long-standing view holds that "Anomalocaris" fed on hard-bodied animals, including trilobites; while its mid-gut glands strongly suggest a predatory lifestyle, its ability to penetrate mineralised shells has, however, been questioned in recent years.
Split into simpler sentences: A long-standing view holds that "Anomalocaris" fed on hard-bodied animals, including trilobites. While its mid-gut glands strongly suggest a predatory lifestyle, its ability to penetrate mineralised shells has come under fire in recent years.