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Escapia christensenioides
Escapia christensenioides G.W. Rothwell, Millay, Stockey in M. Krings, C.J. Harper, Cúneo, G.W. Rothwell Transf. Paleobot. 272. 20 Jul 2018
- Name
- Escapia christensenioides
- Rank
- Species
- Generic Name
- [Genus] Escapia
- 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
- Fossil Status
- foliage (fertile)
- Stratigraphy
- Valanginian
- Strat. comment
- Longarm Formation
- Location
- Coastal exposures in Quatsino Sound at Apple Bay on Vancouver Island, British Columbia, Canada
- Paleoregion
- America (North)
Data for Holotypus
- Repository
- University of Alberta, Department of Geology, Edmonton, Canada
- Repository Number
- concretion P13330C top
Data for Paratypus
- Repository
- University of Alberta, Department of Geology, Edmonton, Canada
- Repository Number
- Oval synangium attached to a pinnule fragment concretion Pl3560A
(Figs. 14.3, 14.7e12), and obliquely sectioned synangium
with smooth-walled spores in concretion P13396C top
- Diagnosis
- Pinnules are thin, with veins dichotomizing with helical and
scalariform tracheids; transfusion tissue is between vein
and sessile synangium. Synangia are round to oval in cross
section, 0.9-1.0 x 0.9-1.8 mm in diameter w1.0 mm
long. Synangia of seven to 12 sporangia are laterally
attached except in the apical third; outer-facing sporangial
wall is five or six cells thick, with some cells having frothy
brown contents. Spores are reniform to ovoid,
16-23 x 13-15 mm; exine baculate with loose perispore;
ornamentation units are 1.0 mm long and 0.5 mm wide.
