Slavicekia gen. nov., a new member of the Normapolles complex from Late Cretaceous sediments of the Czech Republic

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F23%3A10135705" target="_blank" >RIV/00023272:_____/23:10135705 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/23:10467221

Výsledek na webu

<a href="https://www.journals.uchicago.edu/doi/abs/10.1086/724155" target="_blank" >https://www.journals.uchicago.edu/doi/abs/10.1086/724155</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1086/724155" target="_blank" >10.1086/724155</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Slavicekia gen. nov., a new member of the Normapolles complex from Late Cretaceous sediments of the Czech Republic

Popis výsledku v původním jazyce

Premise of research. The Klikov Formation in South Bohemia, Czech Republic, is well known as a rich source of Late Cretaceous mesofossils including numerous angiosperm reproductive structures. In this study, we restudy and reevaluate all flower and fruit specimens from this formation that were earlier referred to the species Vangerowia tricornuta Erw.Knobloch et Mai, and on the basis of a detailed morphological analysis, we describe and establish the new genus Slavicekia and the new species Slavicekia inaequalis. Methodology. Morphological and anatomical investigations of the fossil fruits were carried out using scanning electron microscopy and X-ray micro-computed tomography. Pivotal results. Flowers of Slavicekia exhibit a unique combination of floral characters. Flowers are structurally bisexual and epigynous. The perianth comprises five small tepals arranged in one whorl of two and one whorl of three tepals. The androecium consists of five stamens placed opposite to the tepals (i.e., also the stamens are arranged in two anisomerous whorls). Pollen grains are triangular-oblate and triaperturate. The gynoecium is tricarpellatesyncarpous with an ovary that contains two unequally sized locules, each producing one ovule, but only the one in the larger locule matures into a seed. Conclusions. The type of pollen is characteristic for Normapolles plants, and we therefore propose Slavicekia as a new member of the Normapolles complex in the order Fagales. In addition to the pollen features, other characters, including epigyny, a reduced perianth, and a single seed per fruit, link Slavicekia with the Normapolles complex and the order Fagales. On the basis of a comparison with other Normapolles fossils and extant taxa, we discuss the potential systematic affinities of Slavicekia within core Fagales.

Název v anglickém jazyce

Slavicekia gen. nov., a new member of the Normapolles complex from Late Cretaceous sediments of the Czech Republic

Popis výsledku anglicky

Premise of research. The Klikov Formation in South Bohemia, Czech Republic, is well known as a rich source of Late Cretaceous mesofossils including numerous angiosperm reproductive structures. In this study, we restudy and reevaluate all flower and fruit specimens from this formation that were earlier referred to the species Vangerowia tricornuta Erw.Knobloch et Mai, and on the basis of a detailed morphological analysis, we describe and establish the new genus Slavicekia and the new species Slavicekia inaequalis. Methodology. Morphological and anatomical investigations of the fossil fruits were carried out using scanning electron microscopy and X-ray micro-computed tomography. Pivotal results. Flowers of Slavicekia exhibit a unique combination of floral characters. Flowers are structurally bisexual and epigynous. The perianth comprises five small tepals arranged in one whorl of two and one whorl of three tepals. The androecium consists of five stamens placed opposite to the tepals (i.e., also the stamens are arranged in two anisomerous whorls). Pollen grains are triangular-oblate and triaperturate. The gynoecium is tricarpellatesyncarpous with an ovary that contains two unequally sized locules, each producing one ovule, but only the one in the larger locule matures into a seed. Conclusions. The type of pollen is characteristic for Normapolles plants, and we therefore propose Slavicekia as a new member of the Normapolles complex in the order Fagales. In addition to the pollen features, other characters, including epigyny, a reduced perianth, and a single seed per fruit, link Slavicekia with the Normapolles complex and the order Fagales. On the basis of a comparison with other Normapolles fossils and extant taxa, we discuss the potential systematic affinities of Slavicekia within core Fagales.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10506 - Paleontology

Projekt

<a href="/cs/project/GA20-06134S" target="_blank" >GA20-06134S: Paleoprostředí prvních angiosperm během střední křídy, případová studie na materiálu z Iberského poloostrova a střední Evropy</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Plant Sciences

ISSN

1058-5893

e-ISSN

—

Svazek periodika

184

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

201-213

Kód UT WoS článku

000942920900001

EID výsledku v databázi Scopus

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