Eusporangiate ferns are vascular spore plants, whose sporangia arise from several epidermal cells and not from a single cell as in leptosporangiate ferns.

There are four extant eusporangiate fern families, distributed among three classes.

[1][2] The following diagram shows a likely phylogenic placement of eusporangiate fern classes within the vascular plants.

[3][4] lycophytes (club mosses, spike mosses, quillworts) spermatophytes (seed plants) Equisetales (horsetails) Marattiales Ophioglossales (grapeferns etc.)

[5] In each of the three examples from recently published studies, shown in the following table, it can be seen that, together, the four eusporangiate fern families do not form a single clade.