sentence: subspecies there are six subspecies of amphidromus perversus : amphidromus perversus perversus ( linnaeus , 1758 ) amphidromus perversus butoti laidlaw & solem , 1961 amphidromus perversus emaciatus ( von martens , 1867 ) amphidromus perversus melanomma ( pfeiffer , 1852 ) amphidromus perversus natunensis fulton , 1896 amphidromus perversus rufocinctus fruhstorfer , 1905 distribution distribution of amphidromus perversus include sumatra and java to borneo , sulawesi and bali .