A5101599656- Plant Diversity and Evolution
- Plant and animal studies
- Plant and Fungal Species Descriptions
- Botany, Ecology, and Taxonomy Studies
- Fern and Epiphyte Biology
- Plant Parasitism and Resistance
- Paleontology and Stratigraphy of Fossils
- Botany and Plant Ecology Studies
- Plant Reproductive Biology
- Natural product bioactivities and synthesis
- Geology and Paleoclimatology Research
- Plant Ecology and Taxonomy Studies
- Botany and Geology in Latin America and Caribbean
- Botanical Research and Applications
- Plant biochemistry and biosynthesis
- Hydrocarbon exploration and reservoir analysis
- Photosynthetic Processes and Mechanisms
- Bryophyte Studies and Records
- Second Language Acquisition and Learning
- Leaf Properties and Growth Measurement
- Aquatic Ecosystems and Phytoplankton Dynamics
- Mediterranean and Iberian flora and fauna
- Pasture and Agricultural Systems
- Protist diversity and phylogeny
- Petroleum Processing and Analysis
Indiana University Southeast
2002-2022
Frostburg State University
2006-2018
Indiana University
1994-2014
Universidade de São Paulo
2008
University of Michigan
2005-2007
University of Massachusetts Amherst
2007
Institute of Botany
2007
Chinese Academy of Sciences
2007
Yale University
1990-1992
Robert S. Peabody Museum of Archaeology
1991
Phylogenetic relationships among the four major lineages of land plants (liverworts, mosses, hornworts, and vascular plants) remain vigorously contested; their resolution is essential to our understanding origin early evolution plants. We analyzed three different complementary data sets: a multigene supermatrix, genomic structural character matrix, chloroplast genome sequence using maximum likelihood, parsimony, compatibility methods. Analyses all sets strongly supported liverworts as sister...
Oleanane has been reported in Upper Cretaceous and Tertiary source rocks their related oils suggested as a marker for flowering plants. Correspondence of oleanane concentrations relative to the ubiquitous microbial 17alpha-hopane with angiosperm diversification (Neocomian Miocene) suggests that migrated petroleum can be used identify maximum age unknown or unavailable rock. Rare occurrences pre-Cretaceous suggest either separate lineage leads angiosperms well before Early other plant groups...
The hypothesis that early flowering plants were insect-pollinated could be tested by an examination of the pollination biology basal angiosperms and modes fossil angiosperms. We provide data to show insect-pollinated. Eighty-six percent 29 extant angiosperm families have species are zoophilous (of which 34% specialized) 17% wind-pollinated, whereas eudicot monocot more commonly wind specialized (up 78%). Character reconstruction based on recent molecular trees suggests most parsimonious...
Nucleotide sequences of seven chloroplast (atpB and rbcL, SSU LSU rDNAs), mitochondrial (atp1, rDNA), nuclear (18S rDNA) genes from 192 land plants their algal relatives were analyzed using maximum likelihood parsimony methods. Liverworts, mosses, hornworts, lycophytes, monilophytes (ferns), seed plants, angiosperms all represent strongly supported monophyletic groups. Three bryophyte lineages form a paraphyletic group to vascular with liverworts representing the sister other hornworts being...
Introduction: The challenge of flowering plant history Morphology and leaf architecture glossopterids other reticulate gymnosperm leaves A new gnetophyte from the Late Carnian (Late Triassic) Texas its bearing on origin angiosperm carpel stamen Wood anatomy primitive angiosperms: perspectives syntheses Evidence for earliest stage pollen evolution: a paleoequatorial section Israel evolution Floral structure, development relationships paleoherbs: Saruma, Cabomba, Lactoris selected Piperales...
Recent phylogenetic studies and fossil finds support a new view of the ancestral angiosperm. A diminutive angiosperm from Aptian Australia has attached leaves, with intermediate pinnate-palmate, low-rank venation, lateral axes bearing pistillate organs subtended by bracts bracteoles that are oldest direct evidence flowers. variety data suggests similar morphology for This hypothesis explains similarities between rhizomatous to herbaceous Magnoliidae basal monocots, scarcity early agniosperm...
Abstract Recently, whether Archaefructus has bisexual multi‐parted flowers or just inflorescences of unisexual flowers, and it is ancestral to all angiosperms a derived eudicot have been debated. Here, from the same Yixian Formation, NE China, we report new species, A. eoflora sp. nov., with generic characteristics dissected leaves reproductive axes. It entirely preserved roots, rhizome, shoots protogynous organs at different developmental stages. Its lateral main fertile form...
Abstract A fossil herbaceous angiosperm, Pluricarpellatia peltata gen. et sp. nov., is described from the Lower Cretaceous Crato Formation of northeastern Brazil. The description based on several nearly complete specimens with roots, cordate, excentrically peltate to centrally leaves, and flowering structures in situ seeds. seeds are smooth verrucate have micropyle hilum close together laminar placentation. shares characters extant Nymphaeales, such as a rhizomatous growth form simple,...
The legumes are an important group of flowering plants with a poorly documented evolutionary history. New fossil evidence provides data on the timing origin two derived subfamilies (the Mimosoideae and Papilionoideae). These strongly suggest importance bee pollinators during major period angiosperm diversification.
Recent molecular phylogenetic and clock data both suggest a pre-Mesozoic age for the divergence of angiosperm lineage from other seed plants, greatly predating confirmed fossil record crown group. In addition, studies have not supported morphologically based conclusion that gnetophytes are extant sister group to angiosperms. We examine these relationships ages by using novel approach examining presence oleanane. This includes development methods zeolites preferentially reduce hopanes can...
A new species of aquatic plant, Scutifolium jordanicum gen. et sp. nov., Taylor, Brenner & Basha, is described from the Albian Jordan. The leaves are microphyllous with a symmetrical, elliptical to suborbiculate shape, convex rounded apex and base, actinodromous palinactinodromous primary venation. peltate, centrally attached petioles narrow, elongate, alternately arranged on similarly sized stems. appear be thick have aerenchyma. Comparisons plants peltate palmate venation floating suggest...
Compressed mimosoid inflorescences from a Paleocene‐Eocene boundary locality in western Tennessee are the earliest fossil evidence of subfamily. The discovery confirms antiquity suite characters that has been considered primitive based on comparative morphology modern mimosoids. also consistent with suggested close relationship (ancestral or sister group) between subfamily Mimosoideae and Dimorphandra group tribe Caesalpinieae (subfamily Caesalpinioideae). These flowers show little change...
Leaves of the recently described genus Ticodendron are simple, alternate, stipulate, symmetrical, elliptical with attenuate apices and acute bases, a single order serrations representing modified rosid teeth, pinnate, craspedodromous principal venation, percurrent tertiaries, well-developed, random areolation, anomocytic stomates, T-shaped hairs.Phenetic cladistic analyses leaf other characters were performed in to determine its affinities evolutionary relationships.Several new characters,...
Fossil flowers with affinities to Malpighiaceae have been discovered in the Middle Eocene Claiborne formation of northwestern Tennessee. The new taxon Eoglandulosa warmanensis gen. et sp. nov. Taylor and Crepet, has paired glands on five sepals, clawed petals tricolporate pollen reticulate ornamentation an unusual infratectal wall structure anastomosing elements. fossil is similar some extant species Malpighiaceae. Glandular floral morphology associated specific anthophorid bee pollinators...
Permineralized gigantopterid stems of Vasovinea tianii Li et Taylor gen. sp. nov. were collected from the Upper Permian Guizhou Province, China. They are slender and bear prickles, trichomes, compound hooks. Internally, have a sparganum cortex, eustele, secondary xylem. The mesarch protoxylem tracheids annular to helical thickenings, metaxylem tracheary elements scalariform and/or transversely elongated, bordered pits, while those xylem circular pits. Importantly, inner part has large vessel...
Permineralized gigantopterid stems of Aculeovinea yunguiensis Li et Taylor gen. sp. nov. were collected from the Upper Permian western Guizhou, China, and prepared with cellulose acetate peel technique. The are narrow covered prickles, contain a parenchymatous cortex sparganum‐type fibrous strands, an endodermis‐like layer, variable amounts secondary xylem, eustele mesarch primary vascular bundles, pith. vesselless, tracheids protoxylem have annular, helical, scalariform, or reticulate...
Numerous megafossils of Lauraceae have been reported from the early Tertiary North America, but subfamilial affinities are usually not well understood due to great morphological variability found in extant taxa. The flowers Androglandula tennessensis gen. et sp. nov. Taylor, Middle Eocene Claiborne Formation, six‐parted, pedicellate, bracteate, and stamens with paired basal staminal glands. ethereal oil cells paracytic stomates throughout. fossil species has subtribe Cinnamomineae, this...