Five dispersed medullosalean male organs, one species? Late Pennsylvanian Sydney Coalfield, Canada.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00228745%3A_____%2F21%3AN0000011" target="_blank" >RIV/00228745:_____/21:N0000011 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.geology.cz/bulletin/fulltext/1789_Zodrow_210110.pdf" target="_blank" >http://www.geology.cz/bulletin/fulltext/1789_Zodrow_210110.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3140/bull.geosci.1789" target="_blank" >10.3140/bull.geosci.1789</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Five dispersed medullosalean male organs, one species? Late Pennsylvanian Sydney Coalfield, Canada.

Popis výsledku v původním jazyce

Five dispersed medullosalean male-organ compressions are embedded within a few centimeters of each other in basal Cantabrian fluviolacustrine sediments, Sydney Coalfield, Canada. Exposed are variable shapes, surface features and apparent sizes. The paper deals with the cause of the repose differences, and if one organ species was preserved in five differing positions, or conversely, if five species are involved. New insights based on the macerated external cover (theca) include soluble multicellular trichomes in en echelon formation that are interspersed with rare heteromorphic stomata, and imbricated pattern of prepollen sacs on the internal layer. The organs are interpreted as synangiate structures with large ellipsoidal/circular monolete prepollen grains (overall 447 × 320 μm average, n = 150) of Monoletes Ibrahim ex Schopf. Based on observational data, it appears that all organs belong to one biological species and the enormous size range of prepollen grains could express natural variability, where the huge grains are associated with tripartite segmentation and the smaller grains with quadripartite segmentation in Dolerotheca Halle. The anatomical positions of diverse cuticular and acellular fragments could not be ascertained in the organs.The proximal, distal, or lateral resting positions, relative to the bedding plane of deposition, are haphazard. The studied organs compare with Dolerotheca, although specific assignment is deferred because of an unresolved anatomy in these compressions. The discovery of these five specimens, in concert with previous discoveries, strengthens the hypothesis of an organic connection with Alethopteris pseudograndinioides. • Key words: compression, seed fern, male organs, micromorphology, taphonomy.

Název v anglickém jazyce

Five dispersed medullosalean male organs, one species? Late Pennsylvanian Sydney Coalfield, Canada.

Popis výsledku anglicky

Five dispersed medullosalean male-organ compressions are embedded within a few centimeters of each other in basal Cantabrian fluviolacustrine sediments, Sydney Coalfield, Canada. Exposed are variable shapes, surface features and apparent sizes. The paper deals with the cause of the repose differences, and if one organ species was preserved in five differing positions, or conversely, if five species are involved. New insights based on the macerated external cover (theca) include soluble multicellular trichomes in en echelon formation that are interspersed with rare heteromorphic stomata, and imbricated pattern of prepollen sacs on the internal layer. The organs are interpreted as synangiate structures with large ellipsoidal/circular monolete prepollen grains (overall 447 × 320 μm average, n = 150) of Monoletes Ibrahim ex Schopf. Based on observational data, it appears that all organs belong to one biological species and the enormous size range of prepollen grains could express natural variability, where the huge grains are associated with tripartite segmentation and the smaller grains with quadripartite segmentation in Dolerotheca Halle. The anatomical positions of diverse cuticular and acellular fragments could not be ascertained in the organs.The proximal, distal, or lateral resting positions, relative to the bedding plane of deposition, are haphazard. The studied organs compare with Dolerotheca, although specific assignment is deferred because of an unresolved anatomy in these compressions. The discovery of these five specimens, in concert with previous discoveries, strengthens the hypothesis of an organic connection with Alethopteris pseudograndinioides. • Key words: compression, seed fern, male organs, micromorphology, taphonomy.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10506 - Paleontology

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Bulletin of Geosciences

ISSN

1214-1119

e-ISSN

1802-8225

Svazek periodika

96

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

23

Strana od-do

29–51

Kód UT WoS článku

000606671200003

EID výsledku v databázi Scopus

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