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James F. Parham

D-Index & Metrics

Ecology and Evolution

D-Index
36
Citations
6125
World Ranking
7067
National Ranking
2380

James F. Parham publication distribution in Ecology and Evolution in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Ecology and Evolution in 2026. The highlighted bar marks where James F. Parham sits on this spectrum.

37–41 publications: 2 scientists 42–46 publications: 9 scientists 47–51 publications: 10 scientists 52–56 publications: 31 scientists 57–61 publications: 56 scientists 62–66 publications: 91 scientists 67–71 publications: 92 scientists 72–76 publications: 127 scientists 77–81 publications: 173 scientists 82–86 publications: 236 scientists 87–91 publications: 227 scientists 92–96 publications: 240 scientists 97–101 publications: 333 scientists 102–106 publications: 280 scientists 107–111 publications: 300 scientists 112–116 publications: 285 scientists 117–121 publications: 305 scientists 122–126 publications: 287 scientists 127–131 publications: 278 scientists 132–136 publications: 289 scientists 137–141 publications: 273 scientists 142–146 publications: 262 scientists 147–151 publications: 246 scientists 152–156 publications: 235 scientists 157–161 publications: 205 scientists 162–166 publications: 199 scientists 167–171 publications: 174 scientists 172–176 publications: 164 scientists 177–181 publications: 173 scientists 182–186 publications: 189 scientists 187–191 publications: 170 scientists 192–196 publications: 139 scientists 197–201 publications: 128 scientists 202–206 publications: 117 scientists 207–211 publications: 115 scientists 212–216 publications: 107 scientists 217–221 publications: 124 scientists 222–226 publications: 81 scientists 227–231 publications: 82 scientists 232–236 publications: 85 scientists 237–241 publications: 75 scientists 242–246 publications: 66 scientists 247–251 publications: 81 scientists 252–256 publications: 69 scientists 257–261 publications: 70 scientists 262–266 publications: 55 scientists 267–271 publications: 64 scientists 272–276 publications: 49 scientists 277–281 publications: 48 scientists 282–286 publications: 44 scientists 287–291 publications: 45 scientists 292–296 publications: 36 scientists 297–301 publications: 39 scientists 302–306 publications: 38 scientists 307–311 publications: 30 scientists 312–316 publications: 34 scientists 317–321 publications: 25 scientists 322–326 publications: 22 scientists 327–331 publications: 28 scientists 332–336 publications: 30 scientists 337–341 publications: 22 scientists 342–346 publications: 30 scientists 347–351 publications: 26 scientists 352–356 publications: 22 scientists 357–361 publications: 29 scientists 362–366 publications: 21 scientists 367–371 publications: 12 scientists 372–376 publications: 18 scientists 377–381 publications: 17 scientists 382–386 publications: 13 scientists 387–391 publications: 21 scientists 392–396 publications: 13 scientists 397–401 publications: 10 scientists 402–406 publications: 15 scientists 407–411 publications: 8 scientists 412–416 publications: 9 scientists 417–421 publications: 8 scientists 422–426 publications: 4 scientists 427–431 publications: 10 scientists 432–436 publications: 10 scientists 437–441 publications: 5 scientists 442–446 publications: 4 scientists 447–451 publications: 10 scientists 452–456 publications: 2 scientists 457–461 publications: 4 scientists 462–466 publications: 7 scientists 467–471 publications: 7 scientists 472–476 publications: 6 scientists 477–481 publications: 6 scientists 482–486 publications: 3 scientists 487–491 publications: 3 scientists 492–496 publications: 4 scientists 497–501 publications: 4 scientists 502–506 publications: 8 scientists 507–511 publications: 5 scientists 512–516 publications: 4 scientists 517–521 publications: 5 scientists 522–526 publications: 4 scientists 527–530 publications: 5 scientists 531+ publications: 100 scientists
37 publications 531+

This scientist: 99 publications — 18th percentile

18% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 531 publications or more.

James F. Parham D-index placement in Ecology and Evolution in 2026

The chart shows the D-index (discipline H-index) distribution of Ecology and Evolution scientists ranked by Research.com in 2026. The highlighted bar marks where James F. Parham sits on this spectrum.

30 D-Index: 95 scientists 31 D-Index: 123 scientists 32 D-Index: 191 scientists 33 D-Index: 245 scientists 34 D-Index: 252 scientists 35 D-Index: 244 scientists 36 D-Index: 249 scientists 37 D-Index: 244 scientists 38 D-Index: 254 scientists 39 D-Index: 254 scientists 40 D-Index: 280 scientists 41 D-Index: 274 scientists 42 D-Index: 266 scientists 43 D-Index: 233 scientists 44 D-Index: 248 scientists 45 D-Index: 208 scientists 46 D-Index: 201 scientists 47 D-Index: 213 scientists 48 D-Index: 207 scientists 49 D-Index: 172 scientists 50 D-Index: 209 scientists 51 D-Index: 199 scientists 52 D-Index: 153 scientists 53 D-Index: 169 scientists 54 D-Index: 163 scientists 55 D-Index: 148 scientists 56 D-Index: 120 scientists 57 D-Index: 146 scientists 58 D-Index: 137 scientists 59 D-Index: 140 scientists 60 D-Index: 104 scientists 61 D-Index: 119 scientists 62 D-Index: 118 scientists 63 D-Index: 99 scientists 64 D-Index: 77 scientists 65 D-Index: 100 scientists 66 D-Index: 86 scientists 67 D-Index: 83 scientists 68 D-Index: 75 scientists 69 D-Index: 94 scientists 70 D-Index: 57 scientists 71 D-Index: 68 scientists 72 D-Index: 59 scientists 73 D-Index: 63 scientists 74 D-Index: 66 scientists 75 D-Index: 60 scientists 76 D-Index: 42 scientists 77 D-Index: 49 scientists 78 D-Index: 39 scientists 79 D-Index: 37 scientists 80 D-Index: 43 scientists 81 D-Index: 41 scientists 82 D-Index: 45 scientists 83 D-Index: 34 scientists 84 D-Index: 40 scientists 85 D-Index: 35 scientists 86 D-Index: 55 scientists 87 D-Index: 24 scientists 88 D-Index: 24 scientists 89 D-Index: 30 scientists 90 D-Index: 23 scientists 91 D-Index: 25 scientists 92 D-Index: 27 scientists 93 D-Index: 27 scientists 94 D-Index: 13 scientists 95 D-Index: 23 scientists 96 D-Index: 12 scientists 97 D-Index: 14 scientists 98 D-Index: 19 scientists 99 D-Index: 16 scientists 100 D-Index: 14 scientists 101 D-Index: 5 scientists 102 D-Index: 21 scientists 103 D-Index: 16 scientists 104 D-Index: 10 scientists 105 D-Index: 7 scientists 106 D-Index: 7 scientists 107 D-Index: 7 scientists 108 D-Index: 6 scientists 109 D-Index: 9 scientists 110 D-Index: 11 scientists 111 D-Index: 12 scientists 112 D-Index: 9 scientists 113 D-Index: 7 scientists 114 D-Index: 3 scientists 115 D-Index: 8 scientists 116 D-Index: 5 scientists 117 D-Index: 11 scientists 118 D-Index: 4 scientists 119 D-Index: 2 scientists 120 D-Index: 5 scientists 121+ D-Index: 100 scientists
30 D-Index 121+

This scientist: 36 D-Index — 17th percentile

17% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 121 D-Index or more.

Overview

James F. Parham is affiliated with California State University, Fullerton in the United States. Their research focuses primarily on environmental science and earth and planetary sciences, with significant contributions across several subfields including paleontology, ecology, nature and landscape conservation, global and planetary change, and genetics.

Their scholarly work spans several main topics such as evolution and paleontology studies, amphibian and reptile biology, turtle biology and conservation, wildlife ecology and conservation, paleontology and evolutionary biology, ichthyology and marine biology, and broader marine animal studies.

Frequent coauthors in their publications include Haitao Shi, Andrew D. Gentry, Jian Wang, Walter G. Joyce, and Serjoscha Evers.

James F. Parham's research has been published in a variety of scientific journals. Notable publication venues include The Anatomical Record, Swiss Journal of Palaeontology, Genome Biology and Evolution, iScience, and Current Biology.

Among their recent papers are:

  • A nomenclature for fossil and living turtles using phylogenetically defined clade names, 2021, published in Swiss Journal of Palaeontology
  • An Annotated Chromosome-Level Reference Genome of the Red-Eared Slider Turtle (Trachemys scripta elegans), 2020, published in Genome Biology and Evolution
  • Integrating and updating wildlife conservation in China, 2020, published in Current Biology
  • Sea turtle demand in China threatens the survival of wild populations, 2021, published in iScience
  • China's turtles need protection in the wild, 2021, published in Science

Best Publications

  • Best practices for justifying fossil calibrations

    James F. Parham;James F. Parham;James F. Parham;Philip C. J. Donoghue;Christopher J. Bell;Tyler D. Calway

  • DEVELOPING A PROTOCOL FOR THE CONVERSION OF RANK-BASED TAXON NAMES TO PHYLOGENETICALLY DEFINED CLADE NAMES, AS EXEMPLIFIED BY TURTLES

    Walter G. Joyce;James F. Parham;Jacques Armand Gauthier

  • Specimen collection: An essential tool

    L. A. Rocha;A. Aleixo;G. Allen;F. Almeda

  • A phylogenomic analysis of turtles

    Nicholas G. Crawford;James F. Parham;Anna B. Sellas;Brant C. Faircloth

  • Trade in live reptiles, its impact on wild populations, and the role of the European market

    Mark Auliya;Sandra Altherr;Daniel Ariano-Sanchez;Ernst H. Baard

  • Turtles of the World: Annotated Checklist of Taxonomy and Synonymy, 2009 Update, with Conservation Status Summary

    James F. parham;peTer paul;John B. iverson

  • Calibration uncertainty in molecular dating analyses: there is no substitute for the prior evaluation of time priors

    Rachel C. M. Warnock;James F. Parham;Walter G. Joyce;Tyler R. Lyson

  • A Divergence Dating Analysis of Turtles Using Fossil Calibrations: An Example of Best Practices

    Walter G. Joyce;Walter G. Joyce;James F. Parham;Tyler R. Lyson;Tyler R. Lyson;Rachel C. M. Warnock;Rachel C. M. Warnock

  • Molecular phylogeny of the critically endangered Indochinese box turtle (Cuora galbinifrons).

    Bryan L Stuart;James Ford Parham

  • Evidence for the massive scale of turtle farming in China

    Shi Haitao;James F. Parham;Fan Zhiyong;Hong Meiling

  • Molecular phylogenetics of emydine turtles: taxonomic revision and the evolution of shell kinesis.

    Chris R. Feldman;James Ford Parham

  • A nomenclature for fossil and living turtles using phylogenetically defined clade names

    Walter G. Joyce;Jérémy Anquetin;Edwin Alberto Cadena;Julien Claude

  • Oldest known marine turtle? A new protostegid from the Lower Cretaceous of Colombia

    Edwin-Alberto Cadena;James Parham

  • New Chinese turtles: endangered or invalid? A reassessment of two species using mitochondrial DNA, allozyme electrophoresis and known-locality specimens

    James Ford Parham;W. Brian Simison;Kenneth H. Kozak;Chris R. Feldman

  • New Sea Turtle from the Miocene of Peru and the Iterative Evolution of Feeding Ecomorphologies since the Cretaceous

    James F. Parham;James F. Parham;Nicholas D. Pyenson;Nicholas D. Pyenson;Nicholas D. Pyenson

  • The phylogeny of Mediterranean tortoises and their close relatives based on complete mitochondrial genome sequences from museum specimens

    James F. Parham;J. Robert Macey;J. Robert Macey;Theodore J. Papenfuss;Chris R. Feldman

  • Age and growth of loggerhead sea turtles (Caretta caretta) of coastal Georgia : An assessment of skeletochronological age-estimates

    James F. Parham;George R. Zug

  • Farming endangered turtles to extinction in China

    Shi Haitao;Shi Haitao;James F. Parham;James F. Parham;Michael Lau;Chen Tien-Hsi

  • The complete mitochondrial genome of the enigmatic bigheaded turtle (Platysternon): description of unusual genomic features and the reconciliation of phylogenetic hypotheses based on mitochondrial and nuclear DNA

    James F Parham;James F Parham;Chris R Feldman;Jeffrey L Boore;Jeffrey L Boore

  • Availability of new Bayesian-delimited gecko names and the importance of character-based species descriptions

    Aaron M. Bauer;James F. Parham;Rafe M. Brown;Bryan L. Stuart

  • Repeated mass strandings of Miocene marine mammals from Atacama Region of Chile point to sudden death at sea

    Nicholas D. Pyenson;Nicholas D. Pyenson;Carolina S. Gutstein;Carolina S. Gutstein;James F. Parham;Jacobus P. Le Roux

  • Recent hybrid origin of three rare Chinese turtles

    Bryan L. Stuart;James F. Parham;James F. Parham

  • Molecular Systematics of Old World Stripe-Necked Turtles (Testudines: Mauremys)

    Chris R. Feldman;James F. Parham

Frequent Co-Authors

Walter G. Joyce
Walter G. Joyce University of Fribourg
Theodore J. Papenfuss
Theodore J. Papenfuss University of California, Berkeley
Michael J. Benton
Michael J. Benton University of Bristol
Nicholas D. Pyenson
Nicholas D. Pyenson National Museum of Natural History
Bryan L. Stuart
Bryan L. Stuart North Carolina Museum of Natural Sciences
Jeffrey L. Boore
Jeffrey L. Boore University of California, Berkeley
Randall B. Irmis
Randall B. Irmis University of Utah
Philip C. J. Donoghue
Philip C. J. Donoghue University of Bristol
Rafe M. Brown
Rafe M. Brown University of Kansas
Maria A. Gandolfo
Maria A. Gandolfo Cornell University

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Related Online Degrees & Career Pathways

Studying Ecology and Evolution opens doors to a wide range of interdisciplinary careers. Many students supplement their knowledge with degrees in areas such as human services, education, architecture, or mathematics to expand their skill sets and job prospects.

If you enjoy helping others and want to make an impact on communities, consider pursuing a human services online program. This pathway combines scientific understanding with direct client support roles.

Educators interested in transitioning careers may explore becoming specialists; for example, the route from teacher to speech pathologist shares many overlapping skills with communication in biological fields.

Those curious about the built environment can consider naab-accredited online architecture degrees, which pair well with ecological knowledge, particularly in sustainable design.

Strong quantitative skills are increasingly important. Earning an online degree mathematics is an excellent way to boost analytical capabilities, valuable for research, data analysis, and problem-solving in ecology or evolution careers.

Best Scientists Citing James F. Parham

Walter G. Joyce

Walter G. Joyce

University of Fribourg

Publications: 74

Uwe Fritz

Uwe Fritz

American Museum of Natural History

Publications: 53

H. Bradley Shaffer

H. Bradley Shaffer

University of California, Los Angeles

Publications: 29

Philip C. J. Donoghue

Philip C. J. Donoghue

University of Bristol

Publications: 27

Nicholas D. Pyenson

Nicholas D. Pyenson

National Museum of Natural History

Publications: 24

Sudhir Kumar

Sudhir Kumar

Temple University

Publications: 21

Haiyan Tong

Haiyan Tong

Mahasarakham University

Publications: 21

Rafe M. Brown

Rafe M. Brown

University of Kansas

Publications: 18

Massimo Delfino

Massimo Delfino

University of Turin

Publications: 17

Ziheng Yang

Ziheng Yang

University College London

Publications: 15

Mario Urbina

Mario Urbina

National University of San Marcos

Publications: 14

Giovanni Bianucci

Giovanni Bianucci

University of Pisa

Publications: 14

Simon Y. W. Ho

Simon Y. W. Ho

University of Sydney

Publications: 14

Donald B. Brinkman

Donald B. Brinkman

University of Alberta

Publications: 13

Brant C. Faircloth

Brant C. Faircloth

Louisiana State University

Publications: 13

Karen Meusemann

Karen Meusemann

University of Freiburg

Publications: 13

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