KEY TO THE VARIETIES

1	Scales on pinna-rachis 3 mm long, very narrow with few isodiametric cells at base Ctenitis subconnexa var. subconnexa
1'	Scales on pinna-rachis 1-1.5 mm long, basal 1/3-1/2 formed by isodiametric cells Ctenitis subconnexa var. alstonii