Cyathocalyx;

A conspectus of Indo-Burmese Annonaceae by I. M. Turner- Nordic
Journal of Botany 33: 257–299, 2015-

Species in India with
distribution:

Cyathocalyx martabanicus Hook. f. & Thomson India [Assam, Nagaland, Meghalaya]; Burma 
Cyathocalyx zeylanicus Champ. ex Hook. f. & Thomson Sri Lanka; India [Tamil Nadu, Kerala]