13,882 research outputs found
Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns
No full textpublisher: Elsevier articletitle: Burmese amber fossils bridge the gap in the Cretaceous record of polypod ferns journaltitle: Perspectives in Plant Ecology, Evolution and Systematics articlelink: http://dx.doi.org/10.1016/j.ppees.2016.01.003 content_type: article copyright: Copyright © 2016 Elsevier GmbH. All rights reserved.Copyright © 2016 Elsevier GmbH. All rights reserved. This document is the authors' final accepted version of the journal article. You are advised to consult the publisher's version if you wish to cite from it.NHM Repositor
Towards a monophyletic classification of Lejeuneaceae III: the systematic position of Leiolejeunea
No full textSchäfer-Verwimp, Alfons, Feldberg, Kathrin, Dong, Shanshan, Melick, Huub Van, Peralta, Denilson F., Schmidt, Alexander R., Schneider, Harald, Heinrichs, Jochen (2014): Towards a monophyletic classification of Lejeuneaceae III: the systematic position of Leiolejeunea. Phytotaxa 170 (3): 187-198, DOI: 10.11646/phytotaxa.170.3.4, URL: http://dx.doi.org/10.11646/phytotaxa.170.3.
FIGURE 2 in Size doesn´t matter-recircumscription of Microlejeunea (Lejeuneaceae, Porellales) based on molecular and morphological evidence
No full textFIGURE 2. Phylogram generated in a maximum likelihood analysis of the combined dataset with bootstrap percentage values ≥50 indicated at branches. Black lines: ocelli present, white lines: ocelli lacking.Published as part of Dong, Shanshan, Schäfer-Verwimp, Alfons, Pócs, Tamás, Feldberg, Kathrin, Czumaj, Aleksandra, Schmidt, Alexander R., Schneider, Harald & Heinrichs, Jochen, 2013, Size doesn´t matter-recircumscription of Microlejeunea (Lejeuneaceae, Porellales) based on molecular and morphological evidence, pp. 41-55 in Phytotaxa 85 (2) on page 50, DOI: 10.11646/phytotaxa.85.2.2, http://zenodo.org/record/507179
Evidence for fungivory in Cretaceous amber forests from Gondwana and Laurasia
No full textCretaceous amber inclusions of insect faecal pellets (also called frass) that consist of remnants of ascomycetes and basidiomycetes provide evidence for fungivory in the Mesozoic. Conidia of an anamorphic ascomycete and the possible remains of the perithecia of its teleomorph were found in Cenomanian resin from central Ethiopia. A new anamorphic genus and species, Palaeocurvularia variabilis DORFELT et A. R. SCHMIDT, is described here based on the fungal remains inside and outside the faecal pellets in the amber. Other faecal pellets consisting of remnants of polyporoid basidiomata (polyporous fungi or bracket fungi) were found in pieces of amber from the uppermost Albian in southwestern France. Pigmented skeletal hyphae, setae (spinulae) and basidiospores suggest that this insect food source pertains to the Hymenochaetales (Basidiomycota, Agaricomycetidae). While large fruiting bodies of the Homobasidiomycetes do not appear in the fossil record until the Early Cretaceous, the newly found amber inclusions from France show that these early macromycetes must have served as a habitat for fungivorous insects since the Albian.German Initiative of Excellenc
Evidence for fungivory in Cretaceous amber forests from Gondwana and Laurasia
No full textCretaceous amber inclusions of insect faecal pellets (also called frass) that consist of remnants of ascomycetes and basidiomycetes provide evidence for fungivory in the Mesozoic. Conidia of an anamorphic ascomycete and the possible remains of the perithecia of its teleomorph were found in Cenomanian resin from central Ethiopia. A new anamorphic genus and species, Palaeocurvularia variabilis DORFELT et A. R. SCHMIDT, is described here based on the fungal remains inside and outside the faecal pellets in the amber. Other faecal pellets consisting of remnants of polyporoid basidiomata (polyporous fungi or bracket fungi) were found in pieces of amber from the uppermost Albian in southwestern France. Pigmented skeletal hyphae, setae (spinulae) and basidiospores suggest that this insect food source pertains to the Hymenochaetales (Basidiomycota, Agaricomycetidae). While large fruiting bodies of the Homobasidiomycetes do not appear in the fossil record until the Early Cretaceous, the newly found amber inclusions from France show that these early macromycetes must have served as a habitat for fungivorous insects since the Albian.German Initiative of Excellenc
gen. et sp. nov. (Deuteromycotina): a Cretaceous predatory fungus
No full textIn habitats where nitro-en is the limiting factor, carnivorous fungi gain an advantage by preying on nematodes and other microorganisms. These fungi are abundant in modern terrestrial ecosystems, but they are not predestined for preservation as fossils. Conclusions on their evolutionary history are therefore mainly based on molecular studies that are generally limited to those taxa that have survived until today. Here we present a fossil dimorphic fungus that was found in Late Albian amber front southwestern France. This fungus possessed unicellular hyphal rings as trapping devices and formed blastospores from which a yeast stage developed. The fossil probably represents an anamorph of an ascomycete and is described as Palaeoanellus dimorphus gen. et sp. nov. Because predatory fungi With regular yeast stages are not known from modern ecosystems, the fungus is assumed to not be related to any Recent carnivorous fungus and to belong to an extinct lineage of carnivorous fungi. The inclusions represent the only record of fossil fungi that developed trapping devices, so far. The fungus lived c. 100 million years ago in a limnetic-terrestrial microhabitat. and it was a part of a highly diverse biocenosis at the forest floor of a Cretaceous coastal amber forest
Frullania cretacea sp nov (Porellales, Jungermanniopsida), a leafy liverwort preserved in Cretaceous amber from Myanmar
No full textThe extinct Frullania cretacea sp. nov. is described based on a gametophytic plant fragment preserved in Upper Albian amber from Myanmar (Burma). The fragment contains of a portion of a branched shoot with mamillose leaf lobes and campanulate lobules forming watersacs. The Mesozoic species is assumed to be an early representative of the Frullania crown group and tentatively assigned to F. subg. Frullania.German Research Foundation [3584 / 2-2
Frullania cretacea sp nov (Porellales, Jungermanniopsida), a leafy liverwort preserved in Cretaceous amber from Myanmar
No full textThe extinct Frullania cretacea sp. nov. is described based on a gametophytic plant fragment preserved in Upper Albian amber from Myanmar (Burma). The fragment contains of a portion of a branched shoot with mamillose leaf lobes and campanulate lobules forming watersacs. The Mesozoic species is assumed to be an early representative of the Frullania crown group and tentatively assigned to F. subg. Frullania.German Research Foundation [3584 / 2-2
The fossil hornwort described from Dominican amber is an angiosperm flower
No full textHornworts (Anthocerotophyta) are a main lineage of land plants but they are exceedingly rare as fossils. The only fossil hornwort described from amber has been interpreted as the best preserved fossil of this group. Reinvestigation of this fossil revealed that this Miocene amber inclusion represents a poorly preserved flower that shows some features of the Caesalpinioideae subfamily of the Fabaceae. (C) 2010 Elsevier B.V. All rights reserved.German Initiative of Excellenc
Staminate inflorescences with in situ pollen from Eocene Baltic amber reveal high diversity in Fagaceae (oak family)
No full textEocene Baltic amber forms the largest amber deposit worldwide; however, its source vegetation and climateare much debated. Representatives of the oak family (Fagaceae) were abundant in the Baltic amber source areabased on numerous inclusions of staminate inflorescences or individual florets, previously assigned to Castanea andQuercus. However, the actual generic and infrageneric diversity of Fagaceae from Baltic amber remained unknown.Using flower characteristics and section-diagnostic in situ pollen of staminate inflorescences and detached floret inclusions,we describe 18 fossil-species of Fagaceae making this family by far the most diverse plant family preservedin Baltic amber. We substantiate the occurrence of the Castaneoideae, Quercoideae (Quercus sect. Cyclobalanopsis/ Lobatae; Q. sect. Lobatae; Q. sect. Protobalanus), Trigonobalanoideae and the extinct genus Eotrigonobalanus.Among the 18 fossil-species, six are described as new: Q. aimeeana, Q. casparyi, Q. multipilosa, E. campanulata,E. conwentzii, E. longianthera; and one new combination is published: Q. brachyandra (≡ Castanea brachyandra).In addition, a lectotype is designated for the name Quercites meyerianus and neotypes are designated for the namesCastanea inclusa and Quercus longistaminea (≡ C. longistaminea). Members of the Fagaceae probably inhabitedazonal and zonal vegetation types of the amber source area, including bottomland flood-plains and stream banks(Q. sect. Lobatae), dry habitats (Q. sect. Lobatae, Q. sect. Protobalanus), peaty soils, riparian and swamp forests(Castanopsis, Eotrigonobalanus), as well as mixed mesophytic forests (castaneoids, Quercoideae, trigonobalanoids).Affinities to extant North American and E to SE Asian floras support the recent notion that late Eocene Baltic amber(38 – 34 Ma) was formed in a warm-temperate climate.</p
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