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Escapia
Genus Escapia G.W. Rothwell, Millay, Stockey in M. Krings, C.J. Harper, Cúneo, G.W. Rothwell Transf. Paleobot. 272. 20 Jul 2018
- Name
- Escapia
- Rank
- Genus
- Authors (Pub.)
- Rothwell G. W.
Millay M. A.
Stockey R. A.
- Publication
- Escapia gen. nov.: morphological evolution, paleogeographic diversification, and the environmental distribution of Marattialean ferns through time [2018/7]
- Authors (Book)
- Krings M.
Harper C. J.
Cúneo N. R.
Rothwell G. W.
- Book
- Transformative Paleobotany
- Page number
- 272
- Year
- 2018
- Parent Taxon
- [Order] Marattiales
- Fossil Status
- foliage (fertile)
- Type
- Escapia christensenioides
- Diagnosis
- Pinnules with repeatedly dichotomizing veins, with round
to oval, sessile synangia. Sporangia elongate, exannulate,
surrounding a parenchymatous area in basal half; laterally
confluent prior to dehiscence except at apex. Sporangial
tips with small, solidly cellular extension. Sporangial cavities
largest basally, tapering only slightly acropetally.
Outer sporangial walls forming uniformly thick synangial
wall; free portion of inner-facing sporangial walls thin,
tapering to central midline. Dehiscence by sporangial separation
in distal half of synangium and rupture of elongate
cells occupying central midline of inner-facing sporangial
walls. Spores bilateral, monolete, with thin, loose perispore.
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