Tapeworm Eggs in a 270 Million-Year-Old Shark Coprolite
Publication Date
January 30, 2013
Journal
PLOS ONE
Authors
Paula C. Dentzien Dias, George Poinar Jr, Ana Emilia Q. De Figueiredo, Ana Carolina L. Pacheco, et al
Volume
8
Issue
1
Pages
e55007
DOI
https://dx.plos.org/10.1371/journal.pone.0055007
Publisher URL
http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0055007
PubMed
http://www.ncbi.nlm.nih.gov/pubmed/23383033
PubMed Central
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3559381
Europe PMC
http://europepmc.org/abstract/MED/23383033
Web of Science
000315563800103
Scopus
84873817866
Mendeley
http://www.mendeley.com/research/tapeworm-eggs-270-millionyearold-shark-coprolite
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Mendeley | Further Information

{"title"=>"Tapeworm Eggs in a 270 Million-Year-Old Shark Coprolite", "type"=>"journal", "authors"=>[{"first_name"=>"Paula C.", "last_name"=>"Dentzien-Dias", "scopus_author_id"=>"23392254300"}, {"first_name"=>"George", "last_name"=>"Poinar", "scopus_author_id"=>"36792176800"}, {"first_name"=>"Ana Emilia Q.", "last_name"=>"de Figueiredo", "scopus_author_id"=>"36809111000"}, {"first_name"=>"Ana Carolina L.", "last_name"=>"Pacheco", "scopus_author_id"=>"57197346445"}, {"first_name"=>"Bruno L.D.", "last_name"=>"Horn", "scopus_author_id"=>"53263944500"}, {"first_name"=>"Cesar L.", "last_name"=>"Schultz", "scopus_author_id"=>"7202476487"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"scopus"=>"2-s2.0-84873817866", "sgr"=>"84873817866", "issn"=>"19326203", "doi"=>"10.1371/journal.pone.0055007", "pmid"=>"23383033", "pui"=>"368227251"}, "id"=>"8cbea23b-3031-316a-9e96-90892ef39d2e", "abstract"=>"Remains of parasites in vertebrates are rare from the Mesozoic and Paleozoic. Once most parasites that live in - or pass through - the gastrointestinal tract of vertebrates, fossil feces (coprolites) or even intestinal contents (enterolites) can eventually preserve their remains. Here we announce the discovery of a spiral shark coprolite from the Paleozoic bearing a cluster of 93 small oval-elliptical smooth-shelled structures, interpreted as eggs of a tapeworm.The eggs were found in a thin section of an elasmobranch coprolite. Most of the eggs are filled by pyrite and some have a special polar swelling (operculum), suggesting they are non-erupted eggs. One of the eggs contains a probable developing larva. The eggs are approximately 145-155 µm in length and 88-100 µm in width and vary little in size within the cluster. The depositional and morphological features of the eggs closely resemble those of cestodes. Not only do the individual eggs have features of extant tapeworms, but their deposition all together in an elongate segment is typical to modern tapeworm eggs deposited in mature segments (proglottids). This is the earliest fossil record of tapeworm parasitism of vertebrates and establishes a timeline for the evolution of cestodes. This discovery shows that the fossil record of vertebrate intestinal parasites is much older than was hitherto known and that the interaction between tapeworms and vertebrates occurred at least since the Middle-Late Permian.", "link"=>"http://www.mendeley.com/research/tapeworm-eggs-270-millionyearold-shark-coprolite", "reader_count"=>49, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Researcher"=>10, "Student > Doctoral Student"=>4, "Student > Ph. D. Student"=>5, "Student > Postgraduate"=>2, "Student > Master"=>10, "Other"=>2, "Student > Bachelor"=>13, "Lecturer"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Researcher"=>10, "Student > Doctoral Student"=>4, "Student > Ph. D. Student"=>5, "Student > Postgraduate"=>2, "Student > Master"=>10, "Other"=>2, "Student > Bachelor"=>13, "Lecturer"=>1}, "reader_count_by_subject_area"=>{"Unspecified"=>2, "Environmental Science"=>1, "Biochemistry, Genetics and Molecular Biology"=>2, "Agricultural and Biological Sciences"=>24, "Medicine and Dentistry"=>2, "Veterinary Science and Veterinary Medicine"=>1, "Social Sciences"=>1, "Earth and Planetary Sciences"=>16}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>2}, "Social Sciences"=>{"Social Sciences"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>16}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>24}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>2}, "Unspecified"=>{"Unspecified"=>2}, "Environmental Science"=>{"Environmental Science"=>1}, "Veterinary Science and Veterinary Medicine"=>{"Veterinary Science and Veterinary Medicine"=>1}}, "reader_count_by_country"=>{"United States"=>3, "Brazil"=>1, "Thailand"=>1, "Peru"=>1, "Spain"=>1}, "group_count"=>0}

Scopus | Further Information

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Figshare

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  • {"files"=>["https://ndownloader.figshare.com/files/498321"], "description"=>"<p>A - (photo) Cestode egg with a developing embryophore. B - (drawing) Partial reconstruction of egg in A. Abbreviations: C =  capsule or shell; E =  embryophore (ochosphere); H =  putative developing hooklets; I = inner envelope; M = oncospheral membrane; O = outer envelope; P = putative polar thickening; Op = operculum; S = somatic cells.</p>", "links"=>[], "tags"=>["Infectious diseases", "microbiology", "Evolutionary biology"], "article_id"=>168834, "categories"=>["Microbiology", "Infectious Diseases", "Evolutionary Biology"], "users"=>["Paula C. Dentzien-Dias", "George Poinar Jr", "Ana Emilia Q. de Figueiredo", "Ana Carolina L. Pacheco", "Bruno L. D. Horn", "Cesar L. Schultz"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055007.g003", "stats"=>{"downloads"=>1, "page_views"=>14, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Cestode_egg_/168834", "title"=>"Cestode egg.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 16:13:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/498090"], "description"=>"<p>Spiral heteropolar coprolite with cestode eggs.</p>", "links"=>[], "tags"=>["heteropolar", "coprolite", "cestode"], "article_id"=>168596, "categories"=>["Microbiology", "Infectious Diseases", "Evolutionary Biology"], "users"=>["Paula C. Dentzien-Dias", "George Poinar Jr", "Ana Emilia Q. de Figueiredo", "Ana Carolina L. Pacheco", "Bruno L. D. Horn", "Cesar L. Schultz"], "doi"=>"https://dx.doi.org/10.1371/journal.pone.0055007.g001", "stats"=>{"downloads"=>0, "page_views"=>20, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Spiral_heteropolar_coprolite_with_cestode_eggs_/168596", "title"=>"Spiral heteropolar coprolite with cestode eggs.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2013-02-19 16:12:21"}

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Relative Metric

{"start_date"=>"2013-01-01T00:00:00Z", "end_date"=>"2013-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Biology and life sciences/Parasitology", "average_usage"=>[354, 586, 723, 820, 941, 1045, 1176, 1283, 1391, 1469, 1526, 1639, 1730]}, {"subject_area"=>"/Medicine and health sciences/Parasitic diseases", "average_usage"=>[320, 619, 774, 903, 1012, 1118, 1224, 1333, 1442, 1518, 1600, 1702, 1779]}]}
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