Callophis nigrescens khandallensis Wall, 1913 Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Chordata class Squamata family Elapidae genus Calliophis species Calliophis nigrescens Name Homonyms Callophis nigrescens khandallensis Wall, 1913 Callophis nigrescens var. khandallensis Wall