Intraspecific Variation and Palaeogeographic Dispersal of the Mississippian Miospore Reticulatisporites magnidictyus Playford & Helby, 1968

Renewed study of an Australian Mississippian-age palynoflora — the Grandispora maculosa zonal assemblage from the Mount Johnstone/Italia Road Formation (Hunter Valley, New South Wales) — reveals significant morphological variation in some of its key miospore components — in particular Reticulatispor...

Full description

Saved in:
Bibliographic Details
Published inPalynology Vol. 42; no. 2; pp. 210 - 219
Main Author Playford, Geoffrey
Format Journal Article
LanguageEnglish
Published Philadelphia American Association of Stratigraphic Palynologists 03.04.2018
Taylor & Francis
Taylor & Francis Ltd
Subjects
Australasia
Australia
Azonotriletes
Balickera Australia
biogeography
biostratigraphy
Carboniferous
Dispersal
Early Pennsylvanian epoch
Gondwana
intraspecific variation
Microscopy
miospores
Mississippian
morphology
Mount Johnstone Formation
New South Wales
New South Wales Australia
Paleobotany
Paleozoic
palynomorphs
Reticulatisporites magnidictyus
Serpukhovian age
Stratigraphy
taxonomy
Triletes
New South Wales
Online AccessGet full text

Cover

More Information
Summary:Renewed study of an Australian Mississippian-age palynoflora — the Grandispora maculosa zonal assemblage from the Mount Johnstone/Italia Road Formation (Hunter Valley, New South Wales) — reveals significant morphological variation in some of its key miospore components — in particular Reticulatisporites magnidictyus, the subject of the present account. Detailed microscopy of numerous topotypic specimens of this species, originally described in 1968, results in its formal emendation; this takes particular account of the hitherto unrecognised presence of a proximo-apical prominence about the confluence of the laesurae. The G. maculosa palynoflora, with its constituent R. magnidictyus, has been reported from within a ca. 30–45°S palaeolatitudinal belt, at numerous Western, Eastern, and Northern Gondwanan locations in strata of middle Visean—early Serpukhovian age, but with a possible extension into the Early Pennsylvanian (Bashkirian). Consequently, R. magnidictyus is one of a very limited group of distinctive miospore species that facilitate long-distance chronostratigraphic correlation within the supercontinent.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
content type line 23
ISSN:0191-6122
1558-9188
1558-9188
DOI:10.1080/01916122.2017.1331938