Scimago Journal & Country Rank

Lethaia

Country United States  - SIR icon SIR Ranking of United States
49
H Index
Subject Area and CategoryAgricultural and Biological Sciences
Ecology, Evolution, Behavior and Systematics

Earth and Planetary Sciences
Paleontology
PublisherWiley-Blackwell
Publication typeJournals
ISSN00241164, 15023931
Coverage1968-ongoing
Scope Lethaia is a leading international journal that emphasizes new developments and discoveries in palaeobiological and biostratigraphical research. 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.

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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
Paleontology1999Q1
Paleontology2000Q2
Paleontology2001Q1
Paleontology2002Q1
Paleontology2003Q1
Paleontology2004Q1
Paleontology2005Q1
Paleontology2006Q1
Paleontology2007Q1
Paleontology2008Q1
Paleontology2009Q1
Paleontology2010Q1
Paleontology2011Q1
Paleontology2012Q1
Paleontology2013Q1
Paleontology2014Q1
Paleontology2015Q1
Paleontology2016Q1
Paleontology2017Q1
Paleontology2018Q1
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
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)19990.991
Cites / Doc. (4 years)20000.833
Cites / Doc. (4 years)20011.052
Cites / Doc. (4 years)20020.992
Cites / Doc. (4 years)20031.318
Cites / Doc. (4 years)20041.159
Cites / Doc. (4 years)20051.686
Cites / Doc. (4 years)20061.781
Cites / Doc. (4 years)20071.832
Cites / Doc. (4 years)20081.554
Cites / Doc. (4 years)20091.632
Cites / Doc. (4 years)20101.805
Cites / Doc. (4 years)20112.068
Cites / Doc. (4 years)20122.252
Cites / Doc. (4 years)20132.199
Cites / Doc. (4 years)20142.011
Cites / Doc. (4 years)20152.116
Cites / Doc. (4 years)20162.000
Cites / Doc. (4 years)20171.814
Cites / Doc. (4 years)20181.878
Cites / Doc. (3 years)19990.991
Cites / Doc. (3 years)20000.726
Cites / Doc. (3 years)20011.094
Cites / Doc. (3 years)20020.927
Cites / Doc. (3 years)20031.190
Cites / Doc. (3 years)20041.203
Cites / Doc. (3 years)20051.747
Cites / Doc. (3 years)20061.830
Cites / Doc. (3 years)20071.804
Cites / Doc. (3 years)20081.253
Cites / Doc. (3 years)20091.679
Cites / Doc. (3 years)20101.908
Cites / Doc. (3 years)20111.903
Cites / Doc. (3 years)20122.320
Cites / Doc. (3 years)20132.343
Cites / Doc. (3 years)20142.030
Cites / Doc. (3 years)20151.811
Cites / Doc. (3 years)20161.964
Cites / Doc. (3 years)20171.883
Cites / Doc. (3 years)20181.837
Cites / Doc. (2 years)19990.880
Cites / Doc. (2 years)20000.750
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)20061.931
Cites / Doc. (2 years)20071.259
Cites / Doc. (2 years)20081.241
Cites / Doc. (2 years)20091.525
Cites / Doc. (2 years)20101.692
Cites / Doc. (2 years)20111.724
Cites / Doc. (2 years)20122.686
Cites / Doc. (2 years)20132.483
Cites / Doc. (2 years)20141.649
Cites / Doc. (2 years)20151.598
Cites / Doc. (2 years)20162.109
Cites / Doc. (2 years)20172.055
Cites / Doc. (2 years)20181.719
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 Cites20066
Self Cites200714
Self Cites20085
Self Cites20095
Self Cites201011
Self Cites201115
Self Cites201214
Self Cites201315
Self Cites201414
Self Cites201510
Self Cites201613
Self Cites201713
Self Cites20187
Total Cites1999112
Total Cites200077
Total Cites2001105
Total Cites200276
Total Cites200394
Total Cites200495
Total Cites2005166
Total Cites2006183
Total Cites2007175
Total Cites2008114
Total Cites2009141
Total Cites2010187
Total Cites2011215
Total Cites2012290
Total Cites2013321
Total Cites2014274
Total Cites2015259
Total Cites2016271
Total Cites2017258
Total Cites2018248
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 document19990.912
External Cites per document20000.670
External Cites per document20011.063
External Cites per document20020.866
External Cites per document20031.165
External Cites per document20041.089
External Cites per document20051.684
External Cites per document20061.770
External Cites per document20071.660
External Cites per document20081.198
External Cites per document20091.619
External Cites per document20101.796
External Cites per document20111.770
External Cites per document20122.208
External Cites per document20132.234
External Cites per document20141.926
External Cites per document20151.741
External Cites per document20161.870
External Cites per document20171.788
External Cites per document20181.785
Cites per document19990.991
Cites per document20000.726
Cites per document20011.094
Cites per document20020.927
Cites per document20031.190
Cites per document20041.203
Cites per document20051.747
Cites per document20061.830
Cites per document20071.804
Cites per document20081.253
Cites per document20091.679
Cites per document20101.908
Cites per document20111.903
Cites per document20122.320
Cites per document20132.343
Cites per document20142.030
Cites per document20151.811
Cites per document20161.964
Cites per document20171.883
Cites per document20181.837
% 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
200623.08
200744.12
200846.43
200946.15
201048.08
201150.00
201261.54
201341.30
201436.96
201541.30
201637.78
201750.00
201847.06
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 documents20094
Non-citable documents20103
Non-citable documents20116
Non-citable documents201212
Non-citable documents201313
Non-citable documents20149
Non-citable documents20151
Non-citable documents20160
Non-citable documents20170
Non-citable documents20182
Citable documents1999113
Citable documents2000106
Citable documents200196
Citable documents200282
Citable documents200379
Citable documents200479
Citable documents200595
Citable documents2006100
Citable documents200797
Citable documents200891
Citable documents200984
Citable documents201098
Citable documents2011113
Citable documents2012125
Citable documents2013137
Citable documents2014135
Citable documents2015143
Citable documents2016138
Citable documents2017137
Citable documents2018135
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 documents199959
Uncited documents200061
Uncited documents200147
Uncited documents200241
Uncited documents200327
Uncited documents200437
Uncited documents200541
Uncited documents200640
Uncited documents200745
Uncited documents200835
Uncited documents200936
Uncited documents201030
Uncited documents201137
Uncited documents201240
Uncited documents201336
Uncited documents201441
Uncited documents201538
Uncited documents201625
Uncited documents201732
Uncited documents201845
Cited documents199954
Cited documents200045
Cited documents200149
Cited documents200241
Cited documents200352
Cited documents200442
Cited documents200554
Cited documents200661
Cited documents200754
Cited documents200859
Cited documents200952
Cited documents201071
Cited documents201182
Cited documents201297
Cited documents2013114
Cited documents2014103
Cited documents2015106
Cited documents2016113
Cited documents2017105
Cited documents201892
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