A review of the Triassic pollen Staurosaccites: systematic and phytogeographical implications

Staurosaccites, a highly distinctive pollen genus, ranges from the late Anisian (Pelsonian; Middle Triassic) to the Norian, at low to mid latitudes, globally. Here we review the systematic taxonomy and spatial and temporal ranges of Staurosaccites. We provide an emendation to S. tharipatharensis, sy...

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Bibliographic Details
Published in:Grana
Main Authors: Peng, Jungang, Slater, Sam M., Vajda, Vivi
Format: Report
Language:English
Published: TAYLOR & FRANCIS AS 2021
Subjects:
Onslow Microflora
Ipswich Microflora
palynology
bisaccate pollen
conifer
phytogeography
Anisian
Gondwana
Laurasia
Xizang (Tibet) China
CENTRAL TRANSANTARCTIC MOUNTAINS
SOUTHERN XIZANG TIBET
CHINLE FORMATION
STRATOTYPE SECTION
VICTORIA LAND
NEW-MEXICO
MIDDLE
PALYNOSTRATIGRAPHY
BASIN
Plant Sciences
Transantarctic Mountains
Victoria Land
Online Access:http://ir.nigpas.ac.cn/handle/332004/39941
https://doi.org/10.1080/00173134.2021.1944301
Description
Summary:Staurosaccites, a highly distinctive pollen genus, ranges from the late Anisian (Pelsonian; Middle Triassic) to the Norian, at low to mid latitudes, globally. Here we review the systematic taxonomy and spatial and temporal ranges of Staurosaccites. We provide an emendation to S. tharipatharensis, synonymise S. minutus with the type species S. quadrifidus, and retain the species S. quadrifidus, S. tharipatharensis, S. densus and S. marginalis. Following comparison with morphologically similar pollen and environmental reconstructions of the habitat of its parent plant, we hypothesise that Staurosaccites was produced by a conifer that was likely adapted to warm and humid conditions. Based on occurrences of diagnostic taxa for the Onslow and Ipswich microfloral provinces in the Southern Hemisphere (Staurosaccites, Camerosporites, Enzonalasporites, Infernopollenites and Ovalipollis), we show that these palynofloras were established in the Middle Triassic. Our findings further suggest that, based on the presence of diagnostic taxa in western Laurasia and their absence in eastern Laurasia, western and eastern Laurasia represent different palynofloral provinces in the Middle Triassic.

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