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Sphenopteris gobiensis
Sphenopteris gobiensis E.I. Kostina, A.B. Herman Rev. Palaeobot. Palynol., 193: 91. 2013
- Name
- Sphenopteris gobiensis
- Rank
- Species
- Generic Name
- [Genus] Sphenopteris
- Authors (Pub.)
- Kostina E. I.
Herman A. B.
- Publication
- The Middle Jurassic flora of South Mongolia: Composition, age and phytogeographic position [2013]
- Journal
- Review of Palaeobotany and Palynology
- Volume
- 193
- Page number
- 91
- Year
- 2013
- Fossil Status
- foliage
- Stratigraphy
- Middle Jurassic
- Strat. comment
- Orgilokhbulag Formation, Upper Member
- Location
- K7, Nariin-Sukhait Coalfield, South Mongolia
- Latitude/Longitude
- 42:59′46.8″N
- 101:16′03.7″E
- Paleoregion
- Eurasia (Asia)
Data for Holotypus
- Repository
- Mongolyn Alt Corporation, Ulaanbaatar, Mongolia
- Repository Number
- specimen no. K7/16(2)
- Diagnosis
- Leaf possibly bipinnate, small, linear-lanceolate. Rachis
narrow, straight or slightly sinuous. Pinnae alternate, densely spaced.
Pinnae ovate in the middle and distal parts of the leaf and elliptic to
round in its proximal part. Secondary pinna rachis with a marginal
flange of tissue between the pinnules. Pinnae in the basal and apical
parts of the leaf consist of several pairs of small opposite pinnules.
In the middle part of the leaf basal pinnules opposite, distal ones
tending to alternate catadromously; apical pinnules not developed.
Pinnules broadly cuneate, divided by shallow notches into rounded
lobes, or entire and elliptic. Basal pinnule on acroscopic side usually
larger than the other pinnules of the same pinna. Venation pinnate.
