Marchantiolites porosus Lundbl.

Plant Fossil Names Registry Number: PFN001887


Author: A. B. Lundblad

Rank: species

Genus: Marchantiolites Lundbl.

Reference: Lundblad, B. (1954): Contributions to the geological history of the Hepaticae. Fossil Marchantiales from the Rhaetic-Liassic coal-mines of Skromberga (Prov. of Scania), Sweeden.Svensk Botanisk Tidskrift 48(2): 381–417, pls I–IV.

Page of description: 393

Illustrations or figures: fig. 3, pI. Ill, figs 9–11, pI. IV, 1–7

Name is type for


Holotype S054039a, Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden
Figures: fig. 3A–C, pl. IV, fig. 1

Note: Inventory number according to Rhaetian and Jurassic plants of Scania database of Naturhistoriska riksmuseet:

For the holotype, there are listed following numbers: S054039a, S054039a-01, S054039a-02, S054039a-03.

Original diagnosis/description

Fragment with preserved cellular structure representing the distalmost portion of a segment of a thalloid Hepatic. Apex obtuse, margin of segment ± uneven, width of segment about 2 mm or more (maximum length of the preserved fragment 2.6 mm). Pl. IV: 1.
The thallus consists of at least two cell layers; the one best observed has polygonal, ± isodiametric cells with a diameter of about 30–50 μ. At the margin there are 1–2 rows of smaller cells (about 20–30 μ in diameter). Fig. 3 B.
The epidermis is provided with air-pores apparently numbering about 19 per mm2 in the distalmost portion of the lobe. They are elevated, and each pore is surrounded by a concentric ring of 5–7 cells. These are of moderate size (about 10–30 μ in diameter) and of ± polygonal shape; the openings and radial walls are rather strongly cutinized. The diameter of the opening of the air-pore averages 24 μ (12–40 μ; ten observations). PI. IV: 1; Fig. 3 A–C.


Jurassic, Lower Jurassic


Skromberga, roof of upper coal bed

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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