Schmidt, Alexander R.

[["dc.bibliographiccitation.artnumber","5974"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","4"],["dc.contributor.author","Feldberg, Kathrin"],["dc.contributor.author","Schneider, Harald"],["dc.contributor.author","Stadler, Tanja"],["dc.contributor.author","Schäfer-Verwimp, Alfons"],["dc.contributor.author","Schmidt, Alexander R."],["dc.contributor.author","Heinrichs, Jochen"],["dc.date.accessioned","2018-08-14T10:43:04Z"],["dc.date.available","2018-08-14T10:43:04Z"],["dc.date.issued","2014"],["dc.description.abstract","Recent studies have provided evidence for pulses in the diversification of angiosperms, ferns, gymnosperms, and mosses as well as various groups of animals during the Cretaceous revolution of terrestrial ecosystems. However, evidence for such pulses has not been reported so far for liverworts. Here we provide new insight into liverwort evolution by integrating a comprehensive molecular dataset with a set of 20 fossil age constraints. We found evidence for a relative constant diversification rate of generalistic liverworts (Jungermanniales) since the Palaeozoic, whereas epiphytic liverworts (Porellales) show a sudden increase of lineage accumulation in the Cretaceous. This difference is likely caused by the pronounced response of Porellales to the ecological opportunities provided by humid, megathermal forests, which were increasingly available as a result of the rise of the angiosperms."],["dc.identifier.doi","10.1038/srep05974"],["dc.identifier.pmid","25099137"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11920"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15274"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Epiphytic leafy liverworts diversified in angiosperm-dominated forests"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e0140977"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.lastpage","14"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Heinrichs, Jochen"],["dc.contributor.author","Scheben, Armin"],["dc.contributor.author","Lee, Gaik Ee"],["dc.contributor.author","Váňa, Jiří"],["dc.contributor.author","Schäfer-Verwimp, Alfons"],["dc.contributor.author","Krings, Michael"],["dc.contributor.author","Schmidt, Alexander R."],["dc.date.accessioned","2018-11-07T09:49:05Z"],["dc.date.available","2018-11-07T09:49:05Z"],["dc.date.issued","2015"],["dc.description.abstract","Preservation of liverworts in amber, a fossilized tree resin, is often exquisite. Twenty-three fossil species of liverworts have been described to date from Eocene (35-50 Ma) Baltic amber. In addition, two inclusions have been assigned to the extant species Ptilidium pulcherrimum (Ptilidiales or Porellales). However, the presence of the boreal P. pulcherrimum in the subtropical or warm-temperate Baltic amber forest challenges the phytogeographical interpretation of the Eocene flora. A re-investigation of one of the fossils believed to be P. pulcherrimum reveals that this specimen in fact represents the first fossil evidence of the genus Tetralophozia, and thus is re-described here as Tetralophozia groehnii sp. nov. A second fossil initially assigned to P. pulcherrimum is apparently lost, and can be reassessed only based on the original description and illustrations. This fossil is morphologically similar to the extant North Pacific endemic Ptilidium californicum, rather than P. pulcherrimum. Divergence time estimates based on chloroplast DNA sequences provide evidence of a Miocene origin of P. pulcherrimum, and thus also argue against the presence of this taxon in the Eocene. Ptilidium californicum originated 25-43 Ma ago. As a result, we cannot rule out that the Eocene fossil belongs to P. californicum. Alternatively, the fossil might represent a stem lineage element of Ptilidium or an early crown group species with morphological similarities to P. californicum."],["dc.description.sponsorship","Open-Access Publikationsfonds 2015"],["dc.identifier.doi","10.1371/journal.pone.0140977"],["dc.identifier.isi","000364298400047"],["dc.identifier.pmid","26536603"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12558"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35437"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","Najko"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Molecular and Morphological Evidence Challenges the Records of the Extant Liverwort Ptilidium pulcherrimum in Eocene Baltic Amber"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","147"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Fossil Record"],["dc.bibliographiccitation.lastpage","157"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Feldberg, Kathrin"],["dc.contributor.author","Váňa, Jiří"],["dc.contributor.author","Schäfer-Verwimp, Alfons"],["dc.contributor.author","Krings, Michael"],["dc.contributor.author","Gröhn, Carsten"],["dc.contributor.author","Schmidt, Alexander R."],["dc.contributor.author","Heinrichs, Jochen"],["dc.date.accessioned","2019-07-09T11:44:27Z"],["dc.date.available","2019-07-09T11:44:27Z"],["dc.date.issued","2017"],["dc.description.abstract","A revision of the Baltic and Bitterfeld amber fossils assigned to Cylindrocolea dimorpha (Cephaloziellaceae) has yielded evidence of the presence of multicellular, bifid underleaves, which have not previously been reported for this species and conflict with the current circumscription of the family. We transfer the fossil species to Odontoschisma (sect. Iwatsukia) and propose the new combination O. dimorpha of the Cephaloziaceae. Characteristics of the fossil include an overall small size of the plant, entire-margined, bifid leaves and underleaves, more or less equally thickened leaf cell walls, ventral branching that includes stoloniform branches with reduced leaves, and the lack of a stem hyalodermis and gemmae. Placement of the fossil in Cephaloziaceae profoundly affects divergence time estimates for liverworts based on DNA sequence variation with integrated information from the fossil record. Our reclassification concurs with hypotheses on the divergence times of Cephaloziaceae derived from DNA sequence data that provide evidence of a late Early Cretaceous to early Eocene age of the Odontoschisma crown group and an origin of O. sect. Iwatsukia in the Late Cretaceous to Oligocene."],["dc.identifier.doi","10.5194/fr-20-147-2017"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14766"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59016"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0"],["dc.title","Problems related to the taxonomic placement of incompletely preserved amber fossils: transfer of the Paleogene liverwort Cylindrocolea dimorpha (Cephaloziellaceae) to the extant Odontoschisma sect. Iwatsukia (Cephaloziaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e82547"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","PLOS ONE"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Heinrichs, Jochen"],["dc.contributor.author","Dong, Shanshan"],["dc.contributor.author","Schäfer-Verwimp, Alfons"],["dc.contributor.author","Pócs, Tamás"],["dc.contributor.author","Feldberg, Kathrin"],["dc.contributor.author","Czumaj, Aleksandra"],["dc.contributor.author","Schmidt, Alexander R."],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Renner, Matt A. M."],["dc.contributor.author","Hentschel, Joern"],["dc.contributor.author","Stech, Michael"],["dc.contributor.author","Schneider, Harald"],["dc.contributor.editor","Moreau, Corrie S."],["dc.date.accessioned","2018-08-14T13:55:06Z"],["dc.date.available","2018-08-14T13:55:06Z"],["dc.date.issued","2013"],["dc.description.abstract","Lejeunea is a largely epiphytic, subcosmopolitan liverwort genus with a complex taxonomic history. Species circumscriptions and their relationships are subject to controversy; biogeographic history and diversification through time are largely unknown."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2013"],["dc.identifier.doi","10.1371/journal.pone.0082547"],["dc.identifier.pmid","24367522"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/9572"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15287"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.eissn","1932-6203"],["dc.rights","CC BY 2.5"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.5"],["dc.title","Molecular phylogeny of the leafy liverwort Lejeunea (Porellales): evidence for a neotropical origin, uneven distribution of sexual systems and insufficient taxonomy"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","201"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Fossil Record"],["dc.bibliographiccitation.lastpage","213"],["dc.bibliographiccitation.volume","20"],["dc.contributor.author","Bechteler, Julia"],["dc.contributor.author","Schmidt, Alexander R."],["dc.contributor.author","Renner, Matthew A. M."],["dc.contributor.author","Wang, Bo"],["dc.contributor.author","Pérez-Escobar, Oscar Alejandro"],["dc.contributor.author","Schäfer-Verwimp, Alfons"],["dc.contributor.author","Feldberg, Kathrin"],["dc.contributor.author","Heinrichs, Jochen"],["dc.date.accessioned","2019-07-09T11:43:47Z"],["dc.date.available","2019-07-09T11:43:47Z"],["dc.date.issued","2017"],["dc.description.abstract","DNA-based divergence time estimates suggested major changes in the composition of epiphyte lineages of liverworts during the Cretaceous; however, evidence from the fossil record is scarce. We present the first Cretaceous fossil of the predominantly epiphytic leafy liverwort genus Radula in ca. 100 Myr old Burmese amber. The fossil's exquisite preservation allows first insights into the morphology of early crown group representatives of Radula occurring in gymnosperm-dominated forests. Ancestral character state reconstruction aligns the fossil with the crown group of Radula subg. Odontoradula; however, corresponding divergence time estimates using the software BEAST lead to unrealistically old age estimates. Alternatively, assignment of the fossil to the stem of subg. Odontoradula results in a stem age estimate of Radula of 227.8 Ma (95 % highest posterior density (HPD): 165.7–306.7) and a crown group estimate of 176.3 Ma (135.1–227.4), in agreement with analyses employing standard substitution rates (stem age 235.6 Ma (142.9–368.5), crown group age 183.8 Ma (109.9–289.1)). The fossil likely belongs to the stem lineage of Radula subg. Odontoradula. The fossil's modern morphology suggests that switches from gymnosperm to angiosperm phorophytes occurred without changes in plant body plans in epiphytic liverworts. The fossil provides evidence for striking morphological homoplasy in time. Even conservative node assignments of the fossil support older rather than younger age estimates of the Radula crown group, involving origins for most extant subgenera by the end of the Cretaceous and diversification of their crown groups in the Cenozoic."],["dc.identifier.doi","10.5194/fr-20-201-2017"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14673"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58968"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0"],["dc.title","A Burmese amber fossil of Radula (Porellales, Jungermanniopsida) provides insights into the Cretaceous evolution of epiphytic lineages of leafy liverworts"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]