Ricciopsis florinii Lundbl.

Plant Fossil Names Registry Number: PFN001884

Act LSID: urn:lsid:plantfossilnames.org:act:1884

Rank: species

Original spelling: Florinii

Genus: Ricciopsis 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: 387

Illustrations or figures: pI. I, figs 1–4, pI. II, fig. 1A

Name is type for

Ricciopsis Lundbl. 1954

Types

Holotype S075180, Palaeobotanical Collections, Department of Palaeobiology, the Swedish Museum of Natural History, Stockholm, Sweden
Figures: pl. I, fig. 1

Note: Lundbland (1954: 387): "Type material: the rock specimen shown in Pl. I: 1. The thallus seen in the lower half of PI. 1: 3 (to the right in PI. I: 1; part of the specimen is magnified in PI. 1: 4) is regarded as the holotype of the species. The information on the structure of the rhizoids and epidermis was obtained from the study of a balsam transfer of the indistinct thallus seen to the left in PI. I: 1, which is accordingly regarded as a paratype."

Inventory number according to Rhaetian and Jurassic plants of Scania database of Naturhistoriska riksmuseet:
http://www2.nrm.se/pb/data/scania/welcome.html

Inv. nos for paratypes: S075180-01, S075180-02, S075180-03, S075180-04.

Original diagnosis/description

Plant thalloid. Thalli occurring singly or in groups, of more or less circular shape, forming rosettes of crowded segments; diameter of single specimen about 2.5 cm. Thallus branched dichotomously, margins of segments slightly uneven. Shape of apex of lobes probably ± roundish; widths of ultimate portions of segments 1–3 mm. Segments showing distinct median channels from centre of thallus to marginal lobes; channels about 0.5 mm wide, dichotomizing about three times. PI. I: 1–4.
No ventral scales observed. Epidermal cells of the fragments examined polygonal, thick-walled, up to 80 μ wide. PI. II: 7–8.
Rhizoids 1–2 mm long, about 23 μ wide (range 12–36 μ; ten measurements), attached to ventral portion of thallus, tuberculate or smooth-walled, unicellular or multicellular, with oblique transversal walls, and occasionally ramified. PI. II: 1–6.

Stratigraphy

Jurassic, Lower Jurassic
Liassic

Locality

Sweden
Skromberga, roof of upper coal bed

Plant fossil remain

macro- and meso-fossils-embryophytes except wood

Comments

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