grimur

/Grimur Grimsson

About Grimur Grimsson

This author has not yet filled in any details.
So far Grimur Grimsson has created 53 blog entries.

Combined LM and SEM study of the middle Miocene (Sarmatian) palynoflora from the Lavanttal Basin, Austria: part IV. Magnoliophyta 2 – Fagales to Rosales – 2016

Authors: Friðgeir Grímsson, Guido W. Grimm, Barbara Meller, Johannes M. Bouchal, Reinhard Zetter. An ongoing investigation of the middle Miocene (Sarmatian) palynoflora from the Lavanttal Basin continues to show that it contains an extremely rich assemblage of angiosperm taxa. The Fagales to Rosales pollen record documented here contains 34 different taxa belonging to the Betulaceae [...]

By | January 24th, 2016|Publications|0 Comments

Middle Miocene macrofloral elements from the Lavanttal Basin, Austria, Part I. Ginkgo adiantoides (Unger) Heer – 2015

Authors: Barbara Meller, Reinhard Zetter, Andreas Hassler, Johannes M. Bouchal , Christa-Charlotte Hofmann, Friðgeir Grímsson A new locality, at Schaßbach (Carinthia, Austria), within the Neogene Lavanttal Basin has yielded numerous well preserved early Badenian (Langhian) plant macrofossils. This paper, which is the first in a series of papers that describe the macrofossil remains from Schaßbach, [...]

By | December 10th, 2015|Publications|0 Comments

Specialized and generalized pollen-collection strategies in an ancient bee lineage – 2015

Authors: Torsten Wappler, Conrad C. Labandeira, Michael S. Engel, Reinhard Zetter, Friðgeir Grímsson Iconic examples of insect pollination have emphasized narrowly specialized pollinator mutualisms such as figs and fig wasps and yuccas and yucca moths. However, recent attention by pollination ecologists has focused on the broad spectra of pollinated plants by generalist pollinators such as [...]

By | December 7th, 2015|Publications|0 Comments

Assessing the fossil record of asterids in the context of our current phylogenetic framework – 2015

Authors: Steven R. Manchester, Friðgeir Grímsson, Reinhard Zetter The fossil record provides good evidence for the minimum ages of important events in the diversification and geographic spread of Asteridae, with earliest examples extending back to the Turonian stage of the Late Cretaceous (~89 million years ago [Ma]). Some of the fossil identifications accepted in previous considerations of [...]

By | August 24th, 2015|Publications|0 Comments

Combined LM and SEM study of the middle Miocene (Sarmatian) palynoflora from the Lavanttal Basin, Austria: part III. Magnoliophyta 1 – Magnoliales to Fabales – 2015

Authors: Friðgeir Grímsson, Barbara Meller, Johannes M. Bouchal, Reinhard Zetter. Previous studies on the palynoflora from the Lavanttal Basin show that it contains a rich assemblage of spores and gymnosperm pollen. Present and ongoing investigations of dispersed angiosperm pollen suggest a high diversity within this group, and due to the excellent preservation of the material, [...]

By | April 24th, 2015|Publications|0 Comments

Character state-based taxa erected to accommodate fossil and extant needle stoneflies (Leuctridae – Leuctrida tax.n.) and close relatives – 2015

Authors: Oliver Béthoux, Boris Kondratieff, Friðgeir Grímsson, Erling Ólafsson, Torsten Wappler In order to accommodate a newly discovered fossil specimen related to a subset of extant needle stoneflies (Leuctridae sensu Zwick, 2000), we provide a comparative analysis of the wing venation of these insects, and of their close relatives, primarily based on extant material. A [...]

By | April 24th, 2015|Publications|0 Comments

Fagaceae pollen from the early Cenozoic of West Greenland: revisiting Engler’s and Chaney’s Arcto-Tertiary hypotheses – 2015

Authors: Friðgeir Grímsson, Reinhard Zetter, Guido W. Grimm, Gunver Krarup Pedersen, Asger Ken Pedersen, Thomas Denk In this paper we document Fagaceae pollen from the Eocene of western Greenland. The pollen record suggests a remarkable diversity of the family in the early Cenozoic of Greenland. Extinct Fagaceae pollen types include Eotrigonobalanus, which extends at least back to [...]

By | February 24th, 2015|Publications|0 Comments

Evolutionary trends and ecological differentiation in early Cenozoic fagaceae of western North America – 2014

Authors: Johannes M. Bouchal, Reinhard Zetter, Friðgeir Grímsson, Thomas Denk The early Cenozoic was a key period of evolutionary radiation in Fagaceae. The common notion is that species thriving in the modern summer-dry climate of California originated in climates with ample summer rain during the Paleogene. We investigated in situ and dispersed pollen of Fagaceae [...]

By | August 24th, 2014|Publications|0 Comments

Before the ‘Big Chill’: A preliminary overview of arthropods from the middle Miocene of Iceland (Insecta, Crustacea) – 2014

Authors: Torsten Wappler, Friðgeir Grímsson, Bo Wang, André Nel, Erling Ólafsson, Alexey A. Kotov, Steven R. Davis, Michael S. Engel Well-preserved arthropods are reported from Miocene sedimentary rocks of the Skarðsströnd–Mókollsdalur (9–8 Ma) and Hreðavatn–Stafholt (7–6 Ma) Formations in Iceland. Fossil remains of terrestrial and/or freshwater animals have rarely been reported from the island before. Here [...]

By | May 24th, 2014|Publications|0 Comments

Aponogeton pollen from the Cretaceous and Paleogene of North America and West Greenland: Implications for the origin and palaeobiogeography of the genus – 2014

Authors: Friðgeir Grímsson, Reinhard Zetter, Heidemarie Halbritter, Guido W. Grimm The fossil record of Aponogeton (Aponogetonaceae) is scarce and the few reported macrofossil findings are in need of taxonomic revision. Aponogeton pollen is highly diagnostic and when studied with light microscopy (LM) and scanning electron microscopy (SEM) it cannot be confused with any other pollen types. [...]

By | January 15th, 2014|Publications|0 Comments