For Ophioderma
Hauk, W.D., C.R. Parks, and M.W. Chase. 2003. Phylogenetic studies of Ophioglossaceae: evidence from rbcL and trnL-F plastid DNA sequences and morphology. Molec. Phylogen. Evol. 28: 131-151.
Zhang, L., X.‐P. Fan, S. Petchsri, L. Zhou, R. Pollawatn, X. Zhang, X.‐M. Zhou, N.T. Lu, R. Knapp, S. Chantanaorrapint, P. Limpanasittichai, H. Sun, X.‐F. Gao, and L.‐B. Zhang. 2020. Evolutionary relationships of the ancient fern lineage the adder's tongues (Ophioglossaceae) with description of Sahashia gen. nov. Cladistics 36: 380-393.
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