Ultrastructure and biogeography of Balmeisporites Cookson and Dettmann, 1958

Dettmann M.E. (1995) Ultrastructure and biogeography of Balmeisporites Cookson and Dettmann, 1958. Review of Palaeobotany and Palynology, 89 3-4: 287-296. doi:10.1016/0034-6667(95)00005-4


Author Dettmann M.E.
Title Ultrastructure and biogeography of Balmeisporites Cookson and Dettmann, 1958
Journal name Review of Palaeobotany and Palynology   Check publisher's open access policy
ISSN 0034-6667
Publication date 1995-01-01
Sub-type Article (original research)
DOI 10.1016/0034-6667(95)00005-4
Open Access Status Not yet assessed
Volume 89
Issue 3-4
Start page 287
End page 296
Total pages 10
Subject 1105 Dentistry
1911 Palaeontology
1900 Earth and Planetary Sciences
2300 Environmental Science
Abstract Ultrastructural and morphological analyses of Balmeisporites holodictyus reveal a two-layered wall conformable with that of spores of aquatic ferns. The spheroidal, trilete exospore comprises two zones with columnar structure sandwiched between homogeneous innermost and outermost zones. The outer wall layer, the epispore, has an inner reticulate-fibrillate zone and a homogeneous outer zone: the epispore forms the proximal tripartite acrolamella, prominent reticula in each equatorial radial region and surface sculpture. Ghoshispora shares with Balmeisporites wall ultrastructural and acrolamellate characters, but lacks protruding reticula in each equatorial radial region and possesses second order sculpturing of muri, striae or rugulae. The fossil record indicates that Balmeisporites originated in the Tethyan region during the Barremian-Aptian and for the remainder of the Cretaceous was concentrated in mid-high latitudes of both hemispheres. Ghoshispora had a shorter history with appearances in the Albian of Peru; during the Late Cretaceous its distribution range was centred in northern Laurasia, and, as reported herein, rare occurrences are in the Maastrichtian of Australia. Both genera are unknown in sediments younger than the Danian.
Q-Index Code C1
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Scopus Import - Archived
 
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