Tichavekia grandis Pšenička, Sakala et P.Kraft in Kraft, Pšenička, Sakala & Frýda

Plant Fossil Names Registry Number: PFN000222

Act LSID: urn:lsid:plantfossilnames.org:act:222

Authors: J. Pšenička, J. Sakala & P. Kraft

Rank: species

Genus: Tichavekia Pšenička, Sakala et P.Kraft in Kraft, Pšenička, Sakala & Frýda

Reference: Kraft, P., Pšenička, J., Sakala, J. & Frýda, J. (2018): Initial plant diversification and dispersal event in upper Silurian of the Prague Basin. – Palaeogeography, Palaeoclimatology, Palaeoecology 514(online): 144–155.

Page of description: 146

Illustrations or figures: figs 2A–D, 4A

Name is type for

Tichavekia Pšenička, Sakala et P.Kraft in Kraft, Pšenička, Sakala & Frýda 2018


Holotype F21761b, West Bohemian Museum in Pilsen, Plzeň, Czech Republic
Figures: fig. 2A, D

Note: Counterpart of the holotype (F21761a; fig. 2B) is dasignated as isotype by Kraft et al. (2018[online]: Palaeogeography, Palaeoclimatology, Palaeoecology, 514: 146).

According to PFNR administrators, the Art. 8.5 and Recommendation 8A.3 of ICN state that counterpart of the holotype is a part of the holotype.

Original diagnosis/description

Plants up to 140 mm tall. Five times isotomously dichotomized axes about 1mm wide, with decreasing length of successive dichotomy. The first dichotomy divides the plant into two asymmetrical parts. Terminal sporangia generally ~2.5 mm in diameter, subsphaerical to ellipsod sacciform in shape, placed on the ends of the latest extremely short dichotomies. Sporangia bear round structures 0.75 to ~1 mm in diameter. Other details regarding in situ spores or conducting elements unknown.


Referring to its large size in comparison with most coeval plants.


Silurian, Pridoli
Požáry Formation


Czech Republic
Kosov Quarry

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


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