Diagnosis
provided by World Register of Marine Species
Bythotiaridae with primarily four unbranched radial canals and with four or more centripetal canals arising from the ring canal, blind or joining the cruciform base of the stomach. Gonads transversely folded, frequently forming eight adradial rows of deep transverse furrows; basal portion of tentacles adnate to umbrella margin; all tentacles hollow, nematocysts only in the terminal knob; no ocelli.
Schelpe, E.A.C.L.E. (1970) Pteridophyta FZ Pages 197 - 198As Thelypteris dentata var. dentata (Includes a picture).
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