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Acrangiophyllum pendulatum
Acrangiophyllum pendulatum Mamay Amer. J. Bot., 42(2): 181. 16 Mar 1955
- Name
- Acrangiophyllum pendulatum
- Rank
- Species
- Original spelling
- pendulata
- Generic Name
- [Genus] Acrangiophyllum
- Authors (Pub.)
- Mamay S. H.
- Publication
- Acrangiophyllum, a new genus of Pennsylvanian Pteropsida based on fertile foliage [1955/3]
- Journal
- American Journal of Botany
- Volume
- 42
- Issue
- 2
- Page number
- 181
- Year
- 1955
- Fossil Status
- foliage (fertile)
- Stratigraphy
- Pennsylvanian
- Strat. comment
- Pottsville Formation
- Location
- Vicinity of Cordova, Alabama, USA
- Paleoregion
- Laurussia (Laurentia)
Data for Syntypus
- Repository
- National Museum of Natural History, Smithsonian Institution, Washington, USA
- Repository Number
- USNM 14726, 14727, 14728
- Diagnosis
- Foliage at least once (probably twice) pinnate-pinnatifid. Pinnae to 2.2 cm.
long, each bearing several (to 12) alternate to subopposite pinnules. Pinnules reaching 7 mm. in length, usually about twice as long as broad, with
constricted (usually less than 1 mm. wide) , strongly decurrent bases; pinnule margins deeply pinnatifid, each with 7-9 strongly decurrent,- gently tapering
lobes, each lobe containing a single vein. Pinnule venation a series of slightly unequal dichotomies, the weaker member of each division supplying one
pinnule lobe. Sporangia ovoid, to 1.5 mm. in length and 1 mm. in width, each containing a mass of numerous small (to 20μ. in diameter) , smooth, thin-walled, apparently trilete spores.
