Ctenitis aciculata (Baker) Ching. a. Base of a basal pinna, × 0.6; b. third acroscopic pinnule of a basal pinna, × 2.2; c. detail of b, × 23; d. upper surface of pinna rachis showing ctenitoid hairs, × 20. — C. vilis (Kunze) Ching e. A basal pinna, × 0.85; f. lower surface of pinna rachis, × 23; g. a middle pinna, basal acroscopic pinnule, × 4; h. sorus, the indusium bearing long flexuous glands, × 46; i. subentire distal lobes of a middle pinnule, × 4 (a-d:Parris & Croxall 8941.; e-i:Kunstler 3038.).