Complex sentence: It has become commonplace to refer to Borneo elephants as a "pygmy" subspecies, although adult elephants of Sabah of both genders are similar in height to their counterparts in Peninsular Malaysia.
Split into simpler sentences: It has become commonplace to refer to Borneo elephants as a "pygmy" subspecies. But adult elephants of Sabah of both genders are similar in height to their counterparts in Peninsular Malaysia.