Frullania ekaterinae

Name

Frullania ekaterinae

Rank

Species

Generic Name

[Genus] Frullania

Authors (Pub.)

Mamontov Yu. S. Ignatov M. S. Perkovsky E. E.  

Publication

Liverworts from Rovno Amber (Ukraine). 8 [2019/12]

Journal

Paleontological Journal

Volume

53

Issue

10

Page number

1096

Year

2019

Fossil Status

leafy twigs

Stratigraphy

Priabonian

Strat. comment

35–37 Ma; in amber

Location

Klesov (Pugach quarry), Vladimirets District, Rovno Region, Ukraine

Paleoregion

Eurasia (Europe)

Data for Holotypus

Repository

Schmalhausen Institute of Zoology (SIZK)., National Academy of Sciences of Ukraine, Kyiv, Ukraine

Repository Number

SIZK-K-10091F

Num

1a–1f, 3a–3f

Pub.

Liverworts from Rovno Amber (Ukraine). 8 [2019/12]

Diagnosis

Incubously foliated liverwort with conduplicate-trilobed, entire leaves with a dorsal lobe ovate, obtuse at apex, lacking ocelli, with a ventral lobule slightly longer than wide, adnate to close to stem and lying ±parallel to the stem, forming a widely clavate to obovate watersac with upper half smooth or bearing mammilliform projections, with the mouth generally directed toward the base of the stem, not constricted above the mouth, obovate underleaves as long as wide or up to 1.5 times longer than wide, widest in upper 1/2–1/3, bilobate 0.26–0.45 the length, with the apical half of underleaves armed with 1–3 short teeth on both sides. Differing from the most similar fossil species F. acutata by (1) obtuse (versus little apiculate rather acute in F. acutata) dorsal lobes, (2) distinctly obovate ventral lobules 1.1–1.47 times longer than wide (versus slightly obovate to slightly ovate, 1.5–1.9 times longer than wide in F. acutata), (3) upper half of ventral lobules with slightly to rather strongly projecting cells (versus basal half of the distal side with usually four projecting mammilliform cells, otherwise lobule surface smooth in F. acutata), (4) leaf cells 10–16 μm wide, 11–18 μm long (versus 17–20 μm wide, 20–24 μm long in F. acutata).