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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Earth Science 39 6201 5744 2215 1968 144 5325

Richard L. Cifelli publications per year

The chart shows the history of publications by Richard L. Cifelli between 1960 and 2022, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Richard L. Cifelli published across 63 years, from 1960 to 2022, averaging 2.7 papers a year. Output peaked at 11 publications in 2004. 7 of the 169 publications appeared in the last two years.

No. of publications
2 4 6 8 10
Bar chart. Horizontal axis: year, 1960 to 2022. Vertical axis: number of publications, 0 to 11. Peak 11 publications in 2004. 1960: 2 publications 1961: 0 publications 1962: 0 publications 1963: 0 publications 1964: 1 publication 1965: 0 publications 1966: 4 publications 1967: 3 publications 1968: 2 publications 1969: 1 publication 1970: 1 publication 1971: 1 publication 1972: 3 publications 1973: 1 publication 1974: 2 publications 1975: 0 publications 1976: 3 publications 1977: 2 publications 1978: 0 publications 1979: 1 publication 1980: 0 publications 1981: 3 publications 1982: 3 publications 1983: 5 publications 1984: 1 publication 1985: 3 publications 1986: 5 publications 1987: 2 publications 1988: 2 publications 1989: 2 publications 1990: 5 publications 1991: 1 publication 1992: 2 publications 1993: 3 publications 1994: 2 publications 1995: 1 publication 1996: 2 publications 1997: 3 publications 1998: 7 publications 1999: 4 publications 2000: 6 publications 2001: 6 publications 2002: 5 publications 2003: 1 publication 2004: 11 publications 2005: 0 publications 2006: 1 publication 2007: 3 publications 2008: 2 publications 2009: 0 publications 2010: 1 publication 2011: 4 publications 2012: 2 publications 2013: 3 publications 2014: 6 publications 2015: 6 publications 2016: 6 publications 2017: 4 publications 2018: 5 publications 2019: 0 publications 2020: 7 publications 2021: 6 publications 2022: 1 publication
1960 2022

169 publications in total across all disciplines

View publications per year as a table
Richard L. Cifelli: publications per year, 1960 to 2022
Year Publications
1960 2
1961 0
1962 0
1963 0
1964 1
1965 0
1966 4
1967 3
1968 2
1969 1
1970 1
1971 1
1972 3
1973 1
1974 2
1975 0
1976 3
1977 2
1978 0
1979 1
1980 0
1981 3
1982 3
1983 5
1984 1
1985 3
1986 5
1987 2
1988 2
1989 2
1990 5
1991 1
1992 2
1993 3
1994 2
1995 1
1996 2
1997 3
1998 7
1999 4
2000 6
2001 6
2002 5
2003 1
2004 11
2005 0
2006 1
2007 3
2008 2
2009 0
2010 1
2011 4
2012 2
2013 3
2014 6
2015 6
2016 6
2017 4
2018 5
2019 0
2020 7
2021 6
2022 1
Total 169
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Richard L. Cifelli publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where Richard L. Cifelli sits on this spectrum.

No. of scientists
100 200 300 400 500
Bar chart with 58 bars. Horizontal axis: publications, 38–47 to 603+. Vertical axis: number of scientists, 0 to 557. Most scientists, 557, have 128–137 publications. The last bar groups every scientist with 603 publications or more. The highlighted bar, 138–147 publications, is where this scientist sits. 38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38–47 publications 603+

This scientist: 144 publications — 36th percentile

36% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

View publications distribution as a table
Number of Earth Science scientists by publication count, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
Publications Scientists This scientist
38–47 5
48–57 33
58–67 94
68–77 161
78–87 278
88–97 376
98–107 404
108–117 484
118–127 540
128–137 557
138–147 491 144
148–157 495
158–167 458
168–177 490
178–187 414
188–197 401
198–207 333
208–217 292
218–227 290
228–237 262
238–247 243
248–257 208
258–267 185
268–277 147
278–287 128
288–297 119
298–307 120
308–317 107
318–327 93
328–337 87
338–347 64
348–357 87
358–367 60
368–377 60
378–387 34
388–397 50
398–407 44
408–417 31
418–427 39
428–437 27
438–447 36
448–457 27
458–467 29
468–477 30
478–487 19
488–497 15
498–507 18
508–517 19
518–527 16
528–537 10
538–547 11
548–557 14
558–567 11
568–577 7
578–587 14
588–597 5
598–602 4
603+ 100
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Richard L. Cifelli D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where Richard L. Cifelli sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 77 bars. Horizontal axis: D-Index, 30 to 106+. Vertical axis: number of scientists, 0 to 389. Most scientists, 389, have 36 D-Index. The last bar groups every scientist with 106 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 39 D-Index — 35th percentile

35% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

View D-Index distribution as a table
Number of Earth Science scientists by D-index, Research.com 2026 ranking edition. Based on 9,176 ranked scientists.
D-Index Scientists This scientist
30 144
31 215
32 278
33 379
34 366
35 372
36 389
37 366
38 344
39 349 39
40 296
41 289
42 277
43 279
44 248
45 257
46 212
47 202
48 207
49 204
50 183
51 178
52 182
53 178
54 163
55 117
56 163
57 120
58 113
59 136
60 135
61 96
62 103
63 83
64 103
65 83
66 89
67 92
68 89
69 78
70 75
71 53
72 62
73 54
74 35
75 52
76 50
77 32
78 37
79 20
80 33
81 36
82 34
83 34
84 24
85 19
86 18
87 26
88 30
89 17
90 21
91 19
92 15
93 14
94 20
95 9
96 10
97 15
98 13
99 3
100 13
101 3
102 9
103 4
104 6
105 6
106+ 98
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Overview

Richard L. Cifelli is affiliated with the University of Oklahoma in the United States and has contributed extensively to the fields of Earth and Planetary Sciences and Environmental Science. Their research primarily centers on Paleontology, with additional focus on Nature and Landscape Conservation, Anthropology, Global and Planetary Change, and Ecology, Evolution, Behavior, and Systematics.

Their recent scholarly output includes a variety of publications across multiple peer-reviewed venues. Some of the notable papers are:

  • Ontogenetic dietary shifts in Deinonychus antirrhopus (Theropoda; Dromaeosauridae): Insights into the ecology and social behavior of raptorial dinosaurs through stable isotope analysis, 2020, Palaeogeography Palaeoclimatology Palaeoecology
  • A new species of baenid turtle from the Early Cretaceous Lakota Formation of South Dakota, 2020, Fossil record
  • Molar occlusion and jaw roll in early crown mammals, 2020, Scientific Reports
  • A new vertebrate fauna from the Lower Cretaceous Holly Creek Formation of the Trinity Group, southwest Arkansas, USA, 2021, PeerJ
  • New insights into the cranial osteology of the Early Cretaceous paracryptodiran turtle Lakotemys australodakotensis, 2022, PeerJ

Cifelli's work is published frequently in journals including the Journal of Vertebrate Paleontology, PeerJ, Palaeogeography Palaeoclimatology Palaeoecology, Fossil record, and Scientific Reports. The association with these venues reflects a consistent involvement in vertebrate paleontology and related disciplines.

Their research topics cover a broad spectrum within paleontological and evolutionary biology studies. Key areas of investigation include:

  • Paleontology and Evolutionary Biology
  • Evolution and Paleontology Studies
  • Ichthyology and Marine Biology
  • Pleistocene-Era Hominins and Archaeology
  • Turtle Biology and Conservation
  • Amphibian and Reptile Biology
  • Bat Biology and Ecology Studies

Collaborations have been an integral part of their research process. Frequent coauthors include Tyler Hunt, Brian M. Davis, Joseph Frederickson, Walter G. Joyce, and Yann Rollot, indicating a networked approach within multidisciplinary teams in paleontological sciences.

Best Publications

  • Osteology, paleobiology, and relationships of the sauropod dinosaur Sauroposeidon

    Mathew J. Wedel;Richard L. Cifelli;R. Kent Sanders

  • High-precision 40Ar/39Ar geochronology and the advent of North America’s Late Cretaceous terrestrial fauna

    Richard L. Cifelli;James I. Kirkland;Anne Weil;Alan L. Deino

  • Dinosaur Body Temperatures Determined from Isotopic (^(13)C-^(18)O) Ordering in Fossil Biominerals

    Robert A. Eagle;Robert A. Eagle;Thomas Tütken;Taylor S. Martin;Aradhna K. Tripati

  • Magnetic Polarity Stratigraphy And Mammalian Fauna Of The Deseadan (Late Oligocene-Early Miocene) Salla Beds Of Northern Bolivia

    Bruce J. MacFadden;Kenneth E. Campbell;Richard L. Cifelli;Oscar Siles

  • RADIATION OF CENOZOIC PLANKTONIC FORAMINIFERA

    Unknown

  • Mammals from the age of dinosaurs

    Zofia Kielan-Jaworowska;Richard L. Cifelli;Zhe-Xi Luo

  • The Campanian Terlingua local fauna, with a summary of other vertebrates from the Aguja Formation, Trans-Pecos Texas

    Timothy Rowe;Richard L. Cifelli;Thomas M. Lehman;Anne Weil

  • Early Cretaceous mammal from North America and the evolution of marsupial dental characters.

    Richard L. Cifelli

  • The "condylarths" (archaic Ungulata, Mammalia) from the early Palaeocene of Tiupampa (Bolivia): implications on the origin of the South American ungulates

    Christian de Muizon;Richard L. Cifelli

  • SAUROPOSEIDON PROTELES, A NEW SAUROPOD FROM THE EARLY CRETACEOUS OF OKLAHOMA

    Mathew J. Wedel;Richard L. Cifelli;R. Kent Sanders

  • Tribosphenic mammal from the North American Early Cretaceous

    Richard L. Cifelli

  • Comparing rates of recrystallisation and the potential for preservation of biomolecules from the distribution of trace elements in fossil bones

    Clive N. Trueman;Martin R. Palmer;Judith Field;Karen Privat

  • Dentition and Jaw of Kokopellia juddi, a Primitive Marsupial or Near-Marsupial from the Medial Cretaceous of Utah

    Richard L. Cifelli;Christian de Muizon

  • Fossil evidence for the origin of the marsupial pattern of tooth replacement

    Richard L. Cifelli;Timothy B. Rowe;W. Patrick Luckett;James Banta

  • A Ceratopsian Dinosaur from the Lower Cretaceous of Western North America, and the Biogeography of Neoceratopsia.

    Andrew A. Farke;Andrew A. Farke;W. Desmond Maxwell;W. Desmond Maxwell;Richard L. Cifelli;Mathew J. Wedel;Mathew J. Wedel

  • Cretaceous mammals of southern Utah. I. Marsupials from the Kaiparowits Formation (Judithian)

    Richard L. Cifelli

  • Spalacotheriid symmetrodonts (Mammalia) from the medial Cretaceous (upper Albian or lower Cenomanian) Mussentuchit local fauna, Cedar Mountain Formation, Utah, USA

    Richard L. Cifelli;Scott K. Madsen

  • A new teiid lizard from the Cedar Mountain Formation (Albian–Cenomanian boundary) of Utah

    Randall L. Nydam;Richard L. Cifelli

  • Lizards from the Lower Cretaceous (Aptian–Albian) Antlers and Cloverly Formations

    Randall L. Nydam;Randall L. Nydam;Richard L. Cifelli

  • Protungulatum, Confirmed Cretaceous Occurrence of an Otherwise Paleocene Eutherian (Placental?) Mammal

    J. David Archibald;Yue Zhang;Yue Zhang;Tony Harper;Richard L. Cifelli

  • Cretaceous mammals of southern Utah. III. Therian mammals from the Turonian (early Late Cretaceous)

    Richard L. Cifelli

  • Manual of planktonic foraminifera

    Richard Cifelli

  • SAUROPOSEIDON PROTELES,A NEW SAUROPOD FROM THE EARLY CRETACEOUS

    Mathew J. Wedel;Richard L. Cifelli;R. Kent Sanders;Sam Noble

Frequent Co-Authors

Zhe-Xi Luo
Zhe-Xi Luo University of Chicago
Christian de Muizon
Christian de Muizon French National Museum of Natural History
Luis A. González
Luis A. González University of Kansas
Kenneth D. Rose
Kenneth D. Rose Johns Hopkins University School of Medicine
Michael Archer
Michael Archer University of New South Wales
Malcolm C. McKenna
Malcolm C. McKenna American Museum of Natural History
Aradhna Tripati
Aradhna Tripati University of California, Los Angeles
John M. Eiler
John M. Eiler California Institute of Technology
Walter G. Joyce
Walter G. Joyce University of Fribourg
Gloria Cuenca-Bescós
Gloria Cuenca-Bescós University of Zaragoza

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