Showing papers in "Review of Palaeobotany and Palynology in 1982"

TL;DR: Conifers of the Cheirolepidiaceae extended from the Triassic to the Late Cretaceous or perhaps to the Early Tertiary, and aspects of pollen-exine structure, seed-cone organization as well as vegetative morphology and anatomy suggest high degrees of biological specialization.

TL;DR: Well-preserved Bunya section cones from Europe, South America and India suggest that this section was widespread in both hemispheres during the Jurassic, and that the section Bunya be retained in current taxonomic schemes even though it contains only one extant species.

TL;DR: In this article, a four-metre section containing marine clay and peat deposits, taken at the nature conservancy "Het Ilperveld" in the western part of The Netherlands, was palynologically examined at 1.0 to 2.5 cm intervals for pollen and microfossils, and at 5 to 10cm intervals for macrofossil.

TL;DR: Pollen analyses of rare spring deposits in the Transvaal, South Africa, ranging back to roughly 35, 000 B.P., were carried out as discussed by the authors, where a photographic record of 140 types of palynomorphs was made.

TL;DR: It is proposed that the origin of conifers may have involved a change in shoot structure among either pteridosperms or cordaites, and if true, then archaeopteridalean progymnosperms may not be as closely related to gymnosperm origins as presently believed.

TL;DR: In this article, five palynofloral zones have been recognized from fully cored sections of the Middle Permian to Early Triassic succession of the Bowen Basin, Queensland.

TL;DR: In this paper, a 200 cm long section representing part of the Holocene was taken at the foot of the Hazendonk, a Late Glacial river dune which is situated in the Alblasserwaard, province of Zuid-Holland, the Netherlands.

TL;DR: A detailed analysis of part of a peat bog section from Engbertsdijksveen was used to test the possibility of using pollen concentration values as a basis for time calculations and it was shown that the main factor causing changes of arboreal pollen concentration in the peat is the growth rate.

TL;DR: In this article, the authors present late-glacial pollen diagrams from Hjelm in eastern Denmark and Draved Mose in southwestern Denmark and give an outline of the variation between Betula nana and B. pubescens s.1.

TL;DR: Florin's hypothesis that modern conifer families except the Taxaceae evolved from the Lebachiaceae through the Voltziaceae is examined using two numerical analyses, which show a divergence among the VoltZIaceae the genera into two distinct groups.

TL;DR: Pollen analysis of moss polsters collected from the floor of undisturbed Wisconsin and Upper Michigan forests provides information about pollen representation at the scale of the forest-stand as discussed by the authors.

TL;DR: Stein et al. as discussed by the authors presented a procedure for the preparation of fine-polished surfaces of pyrite permineralization and demineralized thin-sections of limonite perminification.

TL;DR: A study of Indian Palaeozoic gymnospermous woods shows 19 genera and 44 species, of which 11 generA and 21 species are known with pith, primary xylem and secondary Xylem only, and a list of invalid fossil wood taxa lacking diagnostic features is given.

TL;DR: Detached sporangia and seeds occurring in the Lower Gondwanas not only confirm the existence of the three groups of gymnosperms suggested by other megafossils but they also indicate that they may have been more diverse.

TL;DR: Clusters of spherical—globose spores found predominantly in the cortical tissues of underground plant parts appear nearly identical to the chlamydospores produced by the zygomycete fungal family Endogonaceae.

TL;DR: It is proposed that a dissected leaf could have been a primitive one for cycads, and that occurrence of pinnately compound Cycad or cycad-like leaves in the Triassic Period may be interpreted as a manifestation of this early dissected state.

TL;DR: Sporoderm ultrastructure and wall organization in several Paleozoic seed fern pollen types is discussed and stages in exine development in the fossil grains are compared to those present in pollen of extant cycads.

TL;DR: A core from a Late Glacial lake deposit at Graenge on the island of Lolland (Denmark) has been investigated with regard to the composition of the sediment, the palynology, including pollen concentrations and Betula pollen size measurements, and oxygen isotope composition of carbonate as discussed by the authors.

TL;DR: Sphenophyllum appears to show that the assumption that compressions and petrifactions would be different manifestations of the same plant species is not always justified.

TL;DR: Achene-like disseminules with a pappus of hypogynous hairs are described from the Lower Cretaceous lacustrine deposits of the Vitim River, Lake Baikal area.

TL;DR: A new genus referable to the subdivision Zosterophyllophytina is described from the late Early Devonian of northern New Brunswick, Canada, and represents a third morphological type of zosterophyLLophyte to be recorded from the New Brunswick Devonian flora.

TL;DR: Two numerical methods of analysis are described which are capable of presenting a single geometrical representation of the stratigraphical levels and fossil pollen taxa in a pollen diagram, allowing one to investigate similarities between levels, similarities between pollenTaxa, and the relationships between levels and taxa.

TL;DR: Compressed cones of the podocarpaceous taxon Trisacocladus tigrensis Archangelsky collected from the Baquero Formation contain both immature and mature pollen of the Trisaccites -type.

TL;DR: A survey of the Tertiary Buxus records suggests two main European lineages evolved from a common stock — a more primitive and extinct one, B. egeriana, replaced during the Middle—Upper Miocene by more advanced small-leaved populations of B. pliocenica Saporta et Marion with a close relationship to the extant B. sempervirens group.

TL;DR: Alangium probably was a megatherm genus, evolving in Southeast Asia and at an early stage separating into a tropical and a subtropical to temperate lineage.

TL;DR: The thecate cells developing from cultured cysts are identified as Protoperidinium divaricatum (Meunier) Parke et Dodge on the basis of two conspicuous antipical horns and other characters, and the cyst provided for germination experiments are identical to Xandarodinium xanthum Reid.

TL;DR: The pollen representation of major plant taxa and the characteristic pollen assemblages of most of the major vegetation types on Lord Howe Island were studied by pollen analysis of eighteen surface samples.

TL;DR: In this article, Drugg et al. discussed the nature of compound archeopyle types and proposed two new species, P. coriciterium n. sp. and P. indistinctum n., which are congeneric with Phthanoperidinium Drugg and Loeblich emend.

TL;DR: The stratification of the Sphagnum spore wall is unique in the Bryophyta and contains an outer homogenous exine layer called B-layer exine and an innermost layer of intine which has any clear homology in other spores.