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Lonchopteris elegans
Lonchopteris elegans Tenchov Geol. Balcan., 34(1–2): 101. Jun 2004
- Name
- Lonchopteris elegans
- Rank
- Species
- Generic Name
- [Genus] Lonchopteris
- Authors (Pub.)
- Tenchov Y. G.
- Publication
- The genus Lonchopteris Brongniart in the Dobrudzha Carboniferous Basin, Bulgaria [2004/6]
- Journal
- Geologica Balcanica
- Volume
- 34
- Issue
- 1–2
- Page number
- 101
- Year
- 2004
- Fossil Status
- foliage
- Stratigraphy
- Bashkirian
- Strat. comment
- Westphalian A
- Location
- Borehole R 110, Dobrudzha Coalfield, at a depth of 1771 m, Bulgaria
- Paleoregion
- Laurussia (Moesia)
Data for Holotypus
- Repository Number
- Specimen No 11239
- Diagnosis
- Rachis of last order is about 1 mm wide, longitudinally striated. The pinnules are slightly forwards-inclined, nearly oppositely attached. They are linear, parallel-sided for up to 2/3 their length, and then gradually converge to an obtuse or slight acute apex. The base is slightly decurrent in the distal pinnules only. The sinus is oval and naJTow, so that adjacent pinnules arealmost touching. Well-developed pinnules are 915 mm long and 3-4.5 mm wide. The terminal pinnule is oblongate, triangular and narrow. The midvein is clear, straight, and ends near the pinnule apex. It is slightly decurrent in its proximal part. Laterals veins branch at a sharp angle, strongly bend and meet the pinnule border at between about 45° and nearly 80°, depending on the maturity of pinnules. Laterals veins divide two to four times, and anastomose along their entire length forming elongated hexagonal or rhomboidal meshes. From midrib to pinnule border, there are two to four rows of vein-meshes. The first anadromic vein-branch is not anastomosing. Additional veining is presented on the basiscopic side; on the acroscopic side such exist near the end. The first vein-meshes are more or less parallel to the midrib and slightly longer than the meshes in the next row. In the next row, the veinmeshes are not significantly smaller.