James A. Hopson

3.0k total citations
46 papers, 2.0k citations indexed

About

James A. Hopson is a scholar working on Paleontology, Nature and Landscape Conservation and Ecology, Evolution, Behavior and Systematics. According to data from OpenAlex, James A. Hopson has authored 46 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 41 papers in Paleontology, 13 papers in Nature and Landscape Conservation and 9 papers in Ecology, Evolution, Behavior and Systematics. Recurrent topics in James A. Hopson's work include Evolution and Paleontology Studies (40 papers), Paleontology and Evolutionary Biology (30 papers) and Ichthyology and Marine Biology (12 papers). James A. Hopson is often cited by papers focused on Evolution and Paleontology Studies (40 papers), Paleontology and Evolutionary Biology (30 papers) and Ichthyology and Marine Biology (12 papers). James A. Hopson collaborates with scholars based in United States, Australia and South Africa. James A. Hopson's co-authors include John R. Wible, Guillermo W. Rougier, Christian A. Sidor, James M. Clark, J. W. Kitching, Hans‐Dieter Sues, Bruce S. Rubidge, Marisol Montellano-Ballesteros, William D. Turnbull and Timothy J. Gaudin and has published in prestigious journals such as Nature, Science and The American Naturalist.

In The Last Decade

James A. Hopson

45 papers receiving 1.8k citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
James A. Hopson United States 28 1.7k 775 381 315 248 46 2.0k
T. S. Kemp United Kingdom 19 1.5k 0.9× 760 1.0× 235 0.6× 242 0.8× 253 1.0× 37 1.9k
Jason A. Lillegraven United States 19 1.3k 0.8× 249 0.3× 491 1.3× 202 0.6× 382 1.5× 48 1.8k
William A. Clemens United States 21 1.3k 0.8× 294 0.4× 371 1.0× 186 0.6× 241 1.0× 71 1.7k
Eugene S. Gaffney United States 29 2.4k 1.4× 2.0k 2.6× 216 0.6× 680 2.2× 226 0.9× 94 2.9k
Kishor Kumar India 24 898 0.5× 305 0.4× 557 1.5× 200 0.6× 440 1.8× 51 1.5k
Claudia P. Tambussi Argentina 23 1.4k 0.8× 796 1.0× 184 0.5× 152 0.5× 286 1.2× 91 1.6k
Kenneth A. Kermack United Kingdom 14 960 0.5× 282 0.4× 254 0.7× 154 0.5× 158 0.6× 24 1.1k
Jason J. Head United States 21 1.1k 0.6× 586 0.8× 286 0.8× 588 1.9× 195 0.8× 56 1.5k
Edwin H. Colbert United States 24 1.3k 0.7× 568 0.7× 136 0.4× 270 0.9× 210 0.8× 91 1.8k
J. David Archibald United States 25 1.4k 0.8× 222 0.3× 482 1.3× 158 0.5× 241 1.0× 63 1.7k

Countries citing papers authored by James A. Hopson

Since Specialization
Citations

This map shows the geographic impact of James A. Hopson'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 James A. Hopson with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites James A. Hopson more than expected).

Fields of papers citing papers by James A. Hopson

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by James A. Hopson. 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 James A. Hopson. The network helps show where James A. Hopson may publish in the future.

Co-authorship network of co-authors of James A. Hopson

This figure shows the co-authorship network connecting the top 25 collaborators of James A. Hopson. A scholar is included among the top collaborators of James A. Hopson 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 James A. Hopson. James A. Hopson is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Sidor, Christian A. & James A. Hopson. (2017). Cricodon metabolus(Cynodontia: Gomphodontia) from the Triassic Ntawere Formation of northeastern Zambia: patterns of tooth replacement and a systematic review of the Trirachodontidae. Journal of Vertebrate Paleontology. 37(sup1). 39–64. 24 indexed citations
2.
3.
Sues, Hans‐Dieter & James A. Hopson. (2010). Anatomy and phylogenetic relationships ofBoreogomphodon jeffersoni(Cynodontia: Gomphodontia) from the Upper Triassic of Virginia. Journal of Vertebrate Paleontology. 30(4). 1202–1220. 34 indexed citations
4.
Sidor, Christian A. & James A. Hopson. (1998). Ghost lineages and “mammalness”: assessing the temporal pattern of character acquisition in the Synapsida. Paleobiology. 24(2). 254–273. 122 indexed citations
5.
Clark, James M., et al.. (1998). Foot posture in a primitive pterosaur. Nature. 391(6670). 886–889. 62 indexed citations
6.
Gaudin, Timothy J., John R. Wible, James A. Hopson, & William D. Turnbull. (1996). Reexamination of the morphological evidence for the cohort Epitheria (Mammalia, Eutheria). Journal of Mammalian Evolution. 3(1). 31–79. 88 indexed citations
7.
Rubidge, Bruce S. & James A. Hopson. (1996). A primitive anomodont therapsid from the base of the Beaufort Group (Upper Permian) of South Africa. Zoological Journal of the Linnean Society. 117(2). 115–139. 51 indexed citations
8.
Wible, John R. & James A. Hopson. (1995). Homologies of the Prootic Canal in Mammals and Non-mammalian Cynodonts. Journal of Vertebrate Paleontology. 15(2). 331–356. 72 indexed citations
9.
Wible, John R., Desui Miao, & James A. Hopson. (1990). The septomaxilla of fossil and recent synapsids and the problem of the septomaxilla of monotremes and armadillos. Zoological Journal of the Linnean Society. 98(3). 203–228. 50 indexed citations
10.
Clark, James M. & James A. Hopson. (1985). Distinctive mammal-like reptile from Mexico and its bearing on the phylogeny of the Tritylodontidae. Nature. 315(6018). 398–400. 49 indexed citations
11.
Hopson, James A.. (1985). Morphology and relationships of Gomphodontosuchus brasiliensis von Huene (Synapsida, Cynodontia, Tritylodontoidea) from the Triassic of Brazil. Neues Jahrbuch für Geologie und Paläontologie - Monatshefte. 1985(5). 285–299. 23 indexed citations
12.
13.
Throckmorton, Gaylord S., James A. Hopson, & Peter J. Parks. (1981). A REDESCRIPTION OF TOXOLOPHOSAURUS CLOUDI OLSON, A LOWER CRETACEOUS HERBIVOROUS SPHENODONTID REPTILE. Journal of Paleontology. 55(3). 586–597. 43 indexed citations
14.
Hopson, James A. & Leonard Radinsky. (1980). Vertebrate paleontology: new approaches and new insights. Paleobiology. 6(3). 250–270. 9 indexed citations
15.
Hopson, James A.. (1980). Tooth function and replacement in early Mesozoic ornithischian dinosaurs: implications for aestivation. Lethaia. 13(1). 93–105. 27 indexed citations
16.
17.
Hopson, James A.. (1975). The evolution of cranial display structures in hadrosaurian dinosaurs. Paleobiology. 1(1). 21–43. 98 indexed citations
18.
Hopson, James A.. (1975). On the Generic Separation of the Ornithischian Dinosaurs Lychorhinus and Heterodontosaurus from the Stormberg Series (Upper Triassic) of South Africa. South African Journal of Science. 71(10). 302. 31 indexed citations
19.
Hopson, James A. & J. W. Kitching. (1972). A REVISED CLASSIFICATION OF CYNODONTS (REPTILIA; THERAPSIDA). University of the Witwatersrand, Johannesburg Institutional Repository on DSpace (University of the Witwatersrand, Johannesburg). 73 indexed citations
20.
Hopson, James A.. (1964). PSEUDODONTORNIS AND OTHER LARGE MARINE BIRDS FROM THE MIOCENE OF SOUTH CAROLINA. 12 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.

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