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Coniopteris gurvantesensis
Coniopteris gurvantesensis E.I. Kostina, A.B. Herman Rev. Palaeobot. Palynol., 193: 90. 2013
- Name
- Coniopteris gurvantesensis
- Rank
- Species
- Generic Name
- [Genus] Coniopteris
- 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
- 90
- Year
- 2013
- Fossil Status
- foliage (fertile)
- Stratigraphy
- Middle Jurassic
- Strat. comment
- Orgilokhbulag Formation, Upper Member
- Location
- K1, Nariin-Sukhait Coalfield, South Mongolia
- Latitude/Longitude
- 43:00′16.0″N
- 101:15′17.1″E
- Paleoregion
- Eurasia (Asia)
Data for Holotypus
- Repository
- Mongolyn Alt Corporation, Ulaanbaatar, Mongolia
- Repository Number
- specimen no. K1/11(1)
- Diagnosis
- Leaves bipinnate, main rachis straight, broad, covered
with stiff hairs. Secondary pinna rachis straight, narrow, with ridge
on the adaxial side. Pinnae elongate-lanceolate, alternate, loose, not
overlapping. Basal pinnules opposite, others tending to alternate
catadromously. Pinnules located on the rachis at an acute angle. Pinnules
elongate-ovate, ovate or rhombic, divided into several pairs of
rounded lateral lobes and an apical lobe. Basal (first) pinnule on
acroscopic side larger than others. Basal pinnule on basiscopic side
with aphlebiform basal lobe. Venation pinnate. All pinnules in the fertile
pinnae partially reduced, with elliptic sori located at the ends of
veins, usually one sorus per lobe.
