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Lethaia

Country United States  - SIR icon SIR Ranking of United States
53
H Index
Subject Area and CategoryAgricultural and Biological Sciences
Ecology, Evolution, Behavior and Systematics

Earth and Planetary Sciences
Paleontology
Publisher Wiley-Blackwell
Publication typeJournals
ISSN00241164, 15023931
Coverage1968-2020
Scope A formal publication outlet for the International Palaeontological Association (IPA) and the International Commission on Stratigraphy (ICS), Lethaia publishes articles of international interest in the fields of palaeontology and stratigraphy. The articles concentrate on the development of new ideas and methods and descriptions of new features of wide significance rather than routine descriptions. Palaeobiology and ecostratigraphy are the core topics of the journal. In addition to articles, Lethaia contains shorter contributions in the form of discussions, presentations of current scientific activities, reviews and editorials. Lethaia was launched in 1968 as a joint venture between scientists in Denmark, Norway, and Sweden, with the aim of promoting the development of modern methods in scientific publishing and of providing a medium for rapid publication of well-prepared manuscripts of wide international interest.

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Quartiles

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

CategoryYearQuartile
Ecology, Evolution, Behavior and Systematics1999Q1
Ecology, Evolution, Behavior and Systematics2000Q3
Ecology, Evolution, Behavior and Systematics2001Q2
Ecology, Evolution, Behavior and Systematics2002Q2
Ecology, Evolution, Behavior and Systematics2003Q2
Ecology, Evolution, Behavior and Systematics2004Q2
Ecology, Evolution, Behavior and Systematics2005Q1
Ecology, Evolution, Behavior and Systematics2006Q1
Ecology, Evolution, Behavior and Systematics2007Q1
Ecology, Evolution, Behavior and Systematics2008Q1
Ecology, Evolution, Behavior and Systematics2009Q1
Ecology, Evolution, Behavior and Systematics2010Q1
Ecology, Evolution, Behavior and Systematics2011Q1
Ecology, Evolution, Behavior and Systematics2012Q1
Ecology, Evolution, Behavior and Systematics2013Q1
Ecology, Evolution, Behavior and Systematics2014Q2
Ecology, Evolution, Behavior and Systematics2015Q2
Ecology, Evolution, Behavior and Systematics2016Q2
Ecology, Evolution, Behavior and Systematics2017Q2
Ecology, Evolution, Behavior and Systematics2018Q2
Ecology, Evolution, Behavior and Systematics2019Q1
Paleontology1999Q1
Paleontology2000Q2
Paleontology2001Q1
Paleontology2002Q1
Paleontology2003Q1
Paleontology2004Q1
Paleontology2005Q1
Paleontology2006Q1
Paleontology2007Q1
Paleontology2008Q1
Paleontology2009Q1
Paleontology2010Q1
Paleontology2011Q1
Paleontology2012Q1
Paleontology2013Q1
Paleontology2014Q1
Paleontology2015Q1
Paleontology2016Q1
Paleontology2017Q1
Paleontology2018Q1
Paleontology2019Q1
SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

YearSJR
19991.189
20000.553
20010.844
20020.865
20030.854
20040.860
20051.146
20061.229
20071.495
20081.101
20091.386
20101.399
20111.160
20121.240
20131.092
20141.001
20150.948
20160.837
20170.873
20180.869
20190.885
Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)19990.982
Cites / Doc. (4 years)20000.840
Cites / Doc. (4 years)20011.052
Cites / Doc. (4 years)20020.992
Cites / Doc. (4 years)20031.318
Cites / Doc. (4 years)20041.168
Cites / Doc. (4 years)20051.686
Cites / Doc. (4 years)20061.906
Cites / Doc. (4 years)20072.152
Cites / Doc. (4 years)20081.842
Cites / Doc. (4 years)20091.950
Cites / Doc. (4 years)20102.184
Cites / Doc. (4 years)20112.256
Cites / Doc. (4 years)20122.398
Cites / Doc. (4 years)20132.383
Cites / Doc. (4 years)20142.027
Cites / Doc. (4 years)20152.116
Cites / Doc. (4 years)20162.032
Cites / Doc. (4 years)20171.852
Cites / Doc. (4 years)20181.883
Cites / Doc. (4 years)20192.307
Cites / Doc. (3 years)19990.982
Cites / Doc. (3 years)20000.736
Cites / Doc. (3 years)20011.094
Cites / Doc. (3 years)20020.927
Cites / Doc. (3 years)20031.190
Cites / Doc. (3 years)20041.215
Cites / Doc. (3 years)20051.747
Cites / Doc. (3 years)20061.960
Cites / Doc. (3 years)20072.144
Cites / Doc. (3 years)20081.620
Cites / Doc. (3 years)20092.047
Cites / Doc. (3 years)20102.167
Cites / Doc. (3 years)20112.128
Cites / Doc. (3 years)20122.515
Cites / Doc. (3 years)20132.350
Cites / Doc. (3 years)20142.052
Cites / Doc. (3 years)20151.811
Cites / Doc. (3 years)20161.986
Cites / Doc. (3 years)20171.919
Cites / Doc. (3 years)20181.857
Cites / Doc. (3 years)20192.278
Cites / Doc. (2 years)19990.880
Cites / Doc. (2 years)20000.765
Cites / Doc. (2 years)20011.034
Cites / Doc. (2 years)20020.686
Cites / Doc. (2 years)20031.059
Cites / Doc. (2 years)20041.143
Cites / Doc. (2 years)20051.761
Cites / Doc. (2 years)20062.069
Cites / Doc. (2 years)20071.569
Cites / Doc. (2 years)20081.716
Cites / Doc. (2 years)20091.770
Cites / Doc. (2 years)20102.059
Cites / Doc. (2 years)20112.074
Cites / Doc. (2 years)20122.698
Cites / Doc. (2 years)20132.494
Cites / Doc. (2 years)20141.660
Cites / Doc. (2 years)20151.598
Cites / Doc. (2 years)20162.141
Cites / Doc. (2 years)20172.089
Cites / Doc. (2 years)20181.747
Cites / Doc. (2 years)20192.371
Total Cites 
Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

CitesYearValue
Self Cites19999
Self Cites20006
Self Cites20013
Self Cites20025
Self Cites20032
Self Cites20049
Self Cites20056
Self Cites20067
Self Cites200716
Self Cites200810
Self Cites200911
Self Cites201015
Self Cites201119
Self Cites201215
Self Cites201315
Self Cites201414
Self Cites201510
Self Cites201613
Self Cites201713
Self Cites20187
Self Cites201913
Total Cites1999111
Total Cites200078
Total Cites2001105
Total Cites200276
Total Cites200394
Total Cites200496
Total Cites2005166
Total Cites2006196
Total Cites2007223
Total Cites2008162
Total Cites2009217
Total Cites2010260
Total Cites2011283
Total Cites2012332
Total Cites2013322
Total Cites2014277
Total Cites2015259
Total Cites2016274
Total Cites2017261
Total Cites2018247
Total Cites2019303
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

CitesYearValue
External Cites per document19990.903
External Cites per document20000.679
External Cites per document20011.063
External Cites per document20020.866
External Cites per document20031.165
External Cites per document20041.101
External Cites per document20051.684
External Cites per document20061.890
External Cites per document20071.990
External Cites per document20081.520
External Cites per document20091.943
External Cites per document20102.042
External Cites per document20111.985
External Cites per document20122.402
External Cites per document20132.241
External Cites per document20141.948
External Cites per document20151.741
External Cites per document20161.891
External Cites per document20171.824
External Cites per document20181.805
External Cites per document20192.180
Cites per document19990.982
Cites per document20000.736
Cites per document20011.094
Cites per document20020.927
Cites per document20031.190
Cites per document20041.215
Cites per document20051.747
Cites per document20061.960
Cites per document20072.144
Cites per document20081.620
Cites per document20092.047
Cites per document20102.167
Cites per document20112.128
Cites per document20122.515
Cites per document20132.350
Cites per document20142.052
Cites per document20151.811
Cites per document20161.986
Cites per document20171.919
Cites per document20181.857
Cites per document20192.278
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
199929.03
200021.43
20018.70
20023.57
200332.14
200443.59
200547.06
200618.18
200744.44
200851.16
200946.81
201048.08
201150.00
201261.54
201341.30
201436.96
201541.30
201637.78
201750.00
201848.94
201959.18
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

DocumentsYearValue
Non-citable documents19990
Non-citable documents20000
Non-citable documents20010
Non-citable documents20020
Non-citable documents20030
Non-citable documents20040
Non-citable documents20050
Non-citable documents20061
Non-citable documents20072
Non-citable documents20083
Non-citable documents20096
Non-citable documents20106
Non-citable documents20119
Non-citable documents201213
Non-citable documents201313
Non-citable documents20149
Non-citable documents20151
Non-citable documents20160
Non-citable documents20171
Non-citable documents20184
Non-citable documents20195
Citable documents1999113
Citable documents2000106
Citable documents200196
Citable documents200282
Citable documents200379
Citable documents200479
Citable documents200595
Citable documents2006100
Citable documents2007104
Citable documents2008100
Citable documents2009106
Citable documents2010120
Citable documents2011133
Citable documents2012132
Citable documents2013137
Citable documents2014135
Citable documents2015143
Citable documents2016138
Citable documents2017136
Citable documents2018133
Citable documents2019133
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

DocumentsYearValue
Uncited documents199960
Uncited documents200061
Uncited documents200147
Uncited documents200241
Uncited documents200327
Uncited documents200437
Uncited documents200541
Uncited documents200639
Uncited documents200744
Uncited documents200836
Uncited documents200944
Uncited documents201037
Uncited documents201145
Uncited documents201241
Uncited documents201336
Uncited documents201440
Uncited documents201538
Uncited documents201625
Uncited documents201729
Uncited documents201844
Uncited documents201943
Cited documents199953
Cited documents200045
Cited documents200149
Cited documents200241
Cited documents200352
Cited documents200442
Cited documents200554
Cited documents200662
Cited documents200762
Cited documents200867
Cited documents200968
Cited documents201089
Cited documents201197
Cited documents2012104
Cited documents2013114
Cited documents2014104
Cited documents2015106
Cited documents2016113
Cited documents2017108
Cited documents201893
Cited documents201995
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