Qasimia yunnanica sp. nov., a marattialean fern with bivalvate synangia from the Lopingian of Southwest China

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F21%3A00546176" target="_blank" >RIV/67985831:_____/21:00546176 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0034666721001214" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0034666721001214</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.revpalbo.2021.104497" target="_blank" >10.1016/j.revpalbo.2021.104497</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Qasimia yunnanica sp. nov., a marattialean fern with bivalvate synangia from the Lopingian of Southwest China

Popis výsledku v původním jazyce

The Lopingian (upper Permian) in Southwest China yields diverse marattialean plants, however, most of these have been recorded as isolated fragments of fronds, pinnules, and stems. Marattialean Qasimia specimens were recently collected from the upper Permian Xuanwei Formation of Yunnan Province, Southwest China. The well-preserved synangia, sporangia, and prominent in situ spores permitted the emendation of the genus Qasimia and the establishment of the species Q. yunnanica sp. nov. This plant possesses alternately or sub-oppositely arranged fertile pinnules with abaxially attached synangia. The synangia are sessile and bivalvate, with a length nearly half the width of the pinnules. A synangium valve consists of approximately 20 long ellipsoids and laterally fused sporangia. In situ spores of the Punctatosporites type are monolete, 97 × 74 μm on average, with a microverrucate/microgranulate to vermiculate sculpture, these represent the largest in situ spores of this type. The sporangial wall has at least two layers of polygonal/elongated cells. The exine comprises a perine, sexine, and nexine. The characteristics of the marattialeans with bilaterally symmetrical synangia were analyzed based on a comparison of eight related genera in the late Paleozoic and Marattia after the late Paleozoic. The Qasimia-type synangium represents the earliest occurrence of bivalvate synangium, which is a typical feature of modern marattialeans. Although the origin of the bilaterally symmetrical marattialean synangia remains elusive, marattialeans with this type of synangia first appeared in the Euramerica during the late Carboniferous and then migrated to the Cathaysia, where they became more prosperous until the late Permian.

Název v anglickém jazyce

Qasimia yunnanica sp. nov., a marattialean fern with bivalvate synangia from the Lopingian of Southwest China

Popis výsledku anglicky

The Lopingian (upper Permian) in Southwest China yields diverse marattialean plants, however, most of these have been recorded as isolated fragments of fronds, pinnules, and stems. Marattialean Qasimia specimens were recently collected from the upper Permian Xuanwei Formation of Yunnan Province, Southwest China. The well-preserved synangia, sporangia, and prominent in situ spores permitted the emendation of the genus Qasimia and the establishment of the species Q. yunnanica sp. nov. This plant possesses alternately or sub-oppositely arranged fertile pinnules with abaxially attached synangia. The synangia are sessile and bivalvate, with a length nearly half the width of the pinnules. A synangium valve consists of approximately 20 long ellipsoids and laterally fused sporangia. In situ spores of the Punctatosporites type are monolete, 97 × 74 μm on average, with a microverrucate/microgranulate to vermiculate sculpture, these represent the largest in situ spores of this type. The sporangial wall has at least two layers of polygonal/elongated cells. The exine comprises a perine, sexine, and nexine. The characteristics of the marattialeans with bilaterally symmetrical synangia were analyzed based on a comparison of eight related genera in the late Paleozoic and Marattia after the late Paleozoic. The Qasimia-type synangium represents the earliest occurrence of bivalvate synangium, which is a typical feature of modern marattialeans. Although the origin of the bilaterally symmetrical marattialean synangia remains elusive, marattialeans with this type of synangia first appeared in the Euramerica during the late Carboniferous and then migrated to the Cathaysia, where they became more prosperous until the late Permian.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10506 - Paleontology

Projekt

<a href="/cs/project/GA19-06728S" target="_blank" >GA19-06728S: Jak přesně můžeme rekonstruovat karbonský tropický les? Příklady z České republiky a Číny</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Review of Palaeobotany and Palynology

ISSN

0034-6667

e-ISSN

1879-0615

Svazek periodika

293

Číslo periodika v rámci svazku

October 2021

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

104497

Kód UT WoS článku

000694016900011

EID výsledku v databázi Scopus

2-s2.0-85111510655