Thomas A. Ranker

483 total citations
14 papers, 398 citations indexed

About

Thomas A. Ranker is a scholar working on Ecology, Evolution, Behavior and Systematics, Plant Science and Cell Biology. According to data from OpenAlex, Thomas A. Ranker has authored 14 papers receiving a total of 398 indexed citations (citations by other indexed papers that have themselves been cited), including 14 papers in Ecology, Evolution, Behavior and Systematics, 4 papers in Plant Science and 3 papers in Cell Biology. Recurrent topics in Thomas A. Ranker's work include Fern and Epiphyte Biology (10 papers), Plant and animal studies (10 papers) and Plant Diversity and Evolution (9 papers). Thomas A. Ranker is often cited by papers focused on Fern and Epiphyte Biology (10 papers), Plant and animal studies (10 papers) and Plant Diversity and Evolution (9 papers). Thomas A. Ranker collaborates with scholars based in United States and United Kingdom. Thomas A. Ranker's co-authors include Christopher H. Haufler, David S. Barrington, Douglas E. Soltis, Pamela S. Soltis, Michael D. Windham, Andrew Schnabel, Paul G. Wolf, Amy Jean Gilmartin, Charles R. Werth and E. Sheffield and has published in prestigious journals such as American Journal of Botany, Annals of the Missouri Botanical Garden and Systematic Botany.

In The Last Decade

Thomas A. Ranker

14 papers receiving 332 citations

Peers

Thomas A. Ranker

EEBS

GENET

Masayuki Takamiya Japan

Steve J. Russell United Kingdom

E. J. Beuzenberg New Zealand

Shigeo Masuyama Japan

Patricio Novoa Chile

Warren D. Hauk United States

J. A. Rattenbury New Zealand

V. S. Ford United States

Aurélie Grall United Kingdom

Ralf Hand Germany

Masayuki Takamiya Japan

Thomas A. Ranker

422 ×1.2

EEBS

144 ×1.0

90 ×1.4

133 ×2.3

22 ×0.4

GENET

Citations per year, relative to Thomas A. Ranker Thomas A. Ranker (= 1×) peers Masayuki Takamiya

Countries citing papers authored by Thomas A. Ranker

Since Specialization

Citations

This map shows the geographic impact of Thomas A. Ranker's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Thomas A. Ranker with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Thomas A. Ranker more than expected).

Fields of papers citing papers by Thomas A. Ranker

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Thomas A. Ranker. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Thomas A. Ranker. The network helps show where Thomas A. Ranker may publish in the future.

Co-authorship network of co-authors of Thomas A. Ranker

This figure shows the co-authorship network connecting the top 25 collaborators of Thomas A. Ranker. A scholar is included among the top collaborators of Thomas A. Ranker based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Thomas A. Ranker. Thomas A. Ranker is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

14 of 14 papers shown

Ranker, Thomas A.. (1990). Phylogenetic Systematics of Neotropical Heminonitis and Bommeria (Adiantaceae) Based on Morphology, Allozymes, and Flavonoids. Systematic Botany. 15(3). 442–442. 8 indexed citations

Haufler, Christopher H., Michael D. Windham, & Thomas A. Ranker. (1990). Biosystematic Analysis of the Cystopteris tennesseensis (Dryopteridaceae) Complex. Annals of the Missouri Botanical Garden. 77(2). 314–314. 31 indexed citations

Ranker, Thomas A. & Christopher H. Haufler. (1990). A New Combination in Bommeria (Adiantaceae). American Fern Journal. 80(1). 1–1. 4 indexed citations

Ranker, Thomas A., Douglas E. Soltis, Pamela S. Soltis, & Amy Jean Gilmartin. (1990). Subfamilial Phylogenetic Relationships of the Bromeliaceae: Evidence from Chloroplast DNA Restriction Site Variation. Systematic Botany. 15(3). 425–425. 32 indexed citations

Sheffield, E., Paul G. Wolf, Christopher H. Haufler, Thomas A. Ranker, & A. C. Jermy. (1989). A re-evaluation of plants referred to as Pteridium herediae (Colmeiro) Löve & Kjellqvist. Botanical Journal of the Linnean Society. 99(4). 377–386. 9 indexed citations

Ranker, Thomas A.. (1989). Spore Morphology and Generic Delimitation of New World Hemionitis, Gymnopteris, and Bommeria (Adiantaceae). American Journal of Botany. 76(2). 297–297. 3 indexed citations

Ranker, Thomas A., Christopher H. Haufler, Pamela S. Soltis, & Douglas E. Soltis. (1989). Genetic Evidence for Allopolyploidy in the Neotropical Fern Hemionitis pinnatifida (Adiantaceae) and the Reconstruction of an Ancestral Genome. Systematic Botany. 14(4). 439–439. 77 indexed citations

Ranker, Thomas A.. (1989). SPORE MORPHOLOGY AND GENERIC DELIMITATION OF NEW WORLD HEMIONITIS, GYMNOPTERIS, AND BOMMERIA (ADIANTACEAE). American Journal of Botany. 76(2). 297–306. 10 indexed citations

Ranker, Thomas A. & Charles R. Werth. (1986). Active Enzymes from Herbarium Specimens: Electrophoresis as an Afterthought. American Fern Journal. 76(3). 102–102. 7 indexed citations

10.

Barrington, David S., et al.. (1986). Systematic Inferences from Spore and Stomate Size in the Ferns. American Fern Journal. 76(3). 149–149. 103 indexed citations

11.

Ranker, Thomas A. & Andrew Schnabel. (1986). Allozymic and Morphological Evidence for a Progenitor-Derivative Species Pair in Camassia (Liliaceae). Systematic Botany. 11(3). 433–433. 39 indexed citations

12.

Windham, Michael D., Paul G. Wolf, & Thomas A. Ranker. (1986). Factors Affecting Prolonged Spore Viability in Herbarium Collections of Three Species of Pellaea. American Fern Journal. 76(3). 141–141. 37 indexed citations

13.

Haufler, Christopher H. & Thomas A. Ranker. (1985). DIFFERENTIAL ANTHERIDIOGEN RESPONSE AND EVOLUTIONARY MECHANISMS IN CYSTOPTERIS. American Journal of Botany. 72(5). 659–665. 28 indexed citations

14.

Haufler, Christopher H. & Thomas A. Ranker. (1985). Differential Antheridiogen Response and Evolutionary Mechanisms in Cystopteris. American Journal of Botany. 72(5). 659–659. 10 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

Explore authors with similar magnitude of impact