{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:55:48Z","timestamp":1791248148126,"version":"4.1.0"},"reference-count":78,"publisher":"American Society of Parasitologists","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Parasitology"],"published-print":{"date-parts":[[2024,7,10]]},"abstract":"<jats:p>Herein, we provide a supplemental description of Caballerotrema annulatum (Diesing, 1850) Ostrowski de N\u00fa\u00f1ez and Sattmann, 2002 (Digenea: Caballerotrematidae Tkach, Kudlai, and Kostadinova, 2016) based on specimens collected from the intestine of an electric eel, Electrophorus cf. varii (Gymnotiformes: Gymnotidae) captured in the Amazon River (Colombia). This caballerotrematid can be differentiated from its congeners by the following combination of morphological features: body surface spines forming contiguous transverse rows, concentric (wrapping dorso-ventrally around body), distributing into posterior body half (vs. restricted to anterior body half in Caballerotrema brasiliense Prudhoe, 1960; indeterminate for Caballerotrema aruanense Thatcher, 1980 and Caballerotrema piscicola [Stunkard, 1960] Kostadinova and Gibson, 2001); head collar lacking projections (vs. having them in C. brasiliense, C. aruanense, and C. piscicola), narrow (head collar more narrow than maximum body width vs. the head collar being obviously wider than the body in C. brasiliense, C. aruanense, and C. piscicola); corner spines clustered (vs. corner spines distributing as 2 separated pairs in C. brasiliense, C. aruanense, and C. piscicola); pharynx approximately at level of the corner spines (vs. pharynx far anterior to corner spines in C. brasiliense, C. aruanense, and C. piscicola); and testes ovoid and nonoverlapping (C. aruanense; vs. sinuous and overlapping in C. brasiliense and C. piscicola). Based on our results, we revise the diagnosis of Caballerotrema Prudhoe, 1960 to include features associated with the shape and distribution of body surface spines, orientation and position of head collar spines, cirrus sac, seminal vesicle, oviduct, Laurer's canal, o\u00f6type, vitellarium, and transverse vitelline ducts. We performed Bayesian inference analyses using the partial large subunit ribosomal (28S) DNA gene. Our 28S sequence of C. annulatum was recovered sister to that of Caballerotrema sp. (which is the only other caballerotrematid sequence available in GenBank) from an arapaima, Arapaima gigas (Schinz, 1822) (Osteoglossiformes: Arapaimidae) in the Peruvian Amazon. Our sequence of C. annulatum comprises the only caballerotrematid sequenced tethered to a morphological description and a voucher specimen in a lending museum. The present study is a new host record and new locality record for C. annulatum. The phylogeny comprises the most resolved and taxon-rich evolutionary hypothesis for Echinostomatoidea published to date.<\/jats:p>","DOI":"10.1645\/24-9","type":"journal-article","created":{"date-parts":[[2024,7,10]],"date-time":"2024-07-10T04:55:42Z","timestamp":1720587342000},"page":"276-294","source":"Crossref","is-referenced-by-count":6,"title":["Supplemental Description of Caballerotrema annulatum (Diesing, 1850) Ostrowski de N\u00fa\u00f1ez and Sattmann, 2002 (Digenea: Caballerotrematidae) from a New Host (Electrophorus Cf. Varii) and Locality (Amazon River, Colombia) with Phylogenetic Analysis and Emended Generic Diagnosis"],"prefix":"10.1645","volume":"110","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-1513-6958","authenticated-orcid":false,"given":"Kamila","family":"Cajiao-Mora","sequence":"first","affiliation":[{"name":"Aquatic Parasitology Laboratory and Southeastern Cooperative Fish Parasite and Disease Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, 559 Devall Drive, Auburn, Alabama 36849."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John H.","family":"Brule","sequence":"additional","affiliation":[{"name":"Aquatic Parasitology Laboratory and Southeastern Cooperative Fish Parasite and Disease Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, 559 Devall Drive, Auburn, Alabama 36849."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haley R.","family":"Dutton","sequence":"additional","affiliation":[{"name":"Aquatic Parasitology Laboratory and Southeastern Cooperative Fish Parasite and Disease Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, 559 Devall Drive, Auburn, Alabama 36849."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen A.","family":"Bullard","sequence":"additional","affiliation":[{"name":"Aquatic Parasitology Laboratory and Southeastern Cooperative Fish Parasite and Disease Laboratory, School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, 559 Devall Drive, Auburn, Alabama 36849."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1220","reference":[{"key":"12","doi-asserted-by":"publisher","unstructured":"R. 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Petkevi\u010diute,  \"Comparative Cytogenetics.\"  9, \"Phylogenetic relationships of some species of the family Echinostomatidae Odner, 1910 (Trematoda), inferred from nuclear rDNA sequences and karyological analysis.\" 257 (2015)","DOI":"10.3897\/CompCytogen.v9i2.4846"},{"key":"63","doi-asserted-by":"publisher","unstructured":"H. W. Stunkard,  \"The Biological Bulletin.\"  119, \"Further studies on the trematode genus Himasthla with descriptions of H. mcintoshi n. sp., H. piscicola n. sp., and stages in the life-history of H. compacta n. sp.\" 529 (1960)","DOI":"10.2307\/1539266"},{"key":"64","doi-asserted-by":"crossref","unstructured":"V. E. Thatcher,  \"Acta Amazonica.\"  8, \"Quatro novas esp\u00e9cies de Haploporidae (Trematoda: Digenea) de peixes de \u00e1gua doce do Colombia com uma revis\u00e3o do g\u00eanero Saccocoelioides Szidat, 1954.\" 477 (1978)","DOI":"10.1590\/1809-43921978083477"},{"key":"65","doi-asserted-by":"crossref","unstructured":"V. E. Thatcher,  \"Acta Amazonica.\"  9, \"Paramphistomidae (Trematoda: Digenea) de peixes de \u00e1gua doce: dos novos g\u00eaneros da Colombia e uma redescric\u00e3o de Dadaytrema oxyceohala (Diesing, 1836) Travassos, 1934, da Amaz\u00f4nia.\" 203 (1979)","DOI":"10.1590\/1809-43921979091203"},{"key":"66","doi-asserted-by":"crossref","unstructured":"V. E. Thatcher,  \"Acta Amazonica.\"  10, \"Duas novas esp\u00e9cies de Caballerotrema (Trematoda: Echinostomatidae) do Pirarucu e do Aruan\u00e3 (Osteoglossidae), com uma redefini\u00e7\u00e3o do g\u00eanero e uma redescri\u00e7\u00e3o de C. brasiliense Prudhoe, 1960.\" 419 (1980)","DOI":"10.1590\/1809-43921980102419"},{"key":"67","doi-asserted-by":"crossref","unstructured":"V. E. Thatcher  and M. D. Dossman  \"Transactions of the American Microscopical Society.\"  93, \"Lecithobotrioides mediacanoensis n. g., n. sp. (Trematoda: Haploporidae) from a freshwater fish (Prochilodus reticulatus) in Colombia.\" 28 (1974)","DOI":"10.2307\/3225297"},{"key":"68","unstructured":"V. E. Thatcher  and M. D. Dossman  \"Proceedings of the Helminthological Society of Washington.\"  42, \"Unicoelium prochilodorum gen. et sp. n. (Trematoda: Haploporidae) from a freshwater fish (Prochilodus reticulatus) in Colombia.\" 28 (1975)"},{"key":"69","unstructured":"V. E. Thatcher  and T. N. Padilha  \"Revista Brasileira de Biologia.\"  37, \"Spinitectus jamundensis sp. n. (Nematoda, Spiruroidea) from a Colombian freshwater fish, Prochilodus reticulatus Steind.\" 799 (1977)"},{"key":"70","doi-asserted-by":"publisher","unstructured":"V. Tkach, O. Kudlai, A. Kostadinova,  \"International Journal for Parasitology.\"  46, \"Molecular phylogeny and systematics of the Echinostomatoidea Looss, 1899 (Platyhelminthes: Digenea).\" 171 (2016)","DOI":"10.1016\/j.ijpara.2015.11.001"},{"key":"71","doi-asserted-by":"publisher","unstructured":"V. Tkach, J. Pawlowski, J. Mariaux,  \"International Journal for Parasitology.\"  30, \"Phylogenetic analysis of the suborder Plagiorchiata (Platyhelminthes: Digenea) based on partial lsrDNA sequences.\" 83 (2000)","DOI":"10.1016\/S0020-7519(99)00163-0"},{"key":"72","unstructured":"V. Tkach, K. Pawlowski, J. Mariaux, et al.  \"Interrelationships of the Platyhelminthes.\"  \"Molecular phylogeny of the suborder Plagiorchiata and its position in the system of Digenea.\" 186 (2001)"},{"key":"73","doi-asserted-by":"publisher","unstructured":"V. Tkach, J. Schroeder, S. Greiman, et al.  \"Acta Parasitologica.\"  57, \"New genetic lineages, host associations and circulation pathways of Neorickettsia endosymbionts of digeneans.\" 285 (2012)","DOI":"10.2478\/s11686-012-0043-4"},{"key":"76","doi-asserted-by":"publisher","unstructured":"V. V\u00e9lez-Sampedro, M. Uruburu, C. Lenis,  \"ZooKeys.\"  1115, \"Morphological, molecular, and life cycle study of a new species of Oligogonotylus Watson, 1976 (Digenea, Cryptogonimidae) from Colombia.\" 169 (2022)","DOI":"10.3897\/zookeys.1115.75538"},{"key":"77","doi-asserted-by":"publisher","unstructured":"R. T. Vianna, W. A. Boeger, A. D. M. Dove,  \"Acta Zoologica.\"  88, \"Neotropical Monogenoidea. 51. Scutalatus magniancoratus gen. et sp. n. (Gyrodactylidae) from the South-American Electric eel, Electrophorus electricus (Gymnotiformes: Gymnotidae), and redescription of Mormyrogyrodactylus gemini from the African Bulldog, Marcusenius macrolepidotus (Mormyridae, Osteoglossiformes).\" 89 (2007)","DOI":"10.1111\/j.1463-6395.2007.00255.x"},{"key":"78","doi-asserted-by":"publisher","unstructured":"L. R. Virgilio, A. Nogueira, R. M. Takemoto, et al.  \"Journal of Helminthology.\"  97, \"Morphological description and molecular characterization of Ancyracanthus electrophori n. sp. (Gnathostomatoidea: Gnathostomatidae): A new nematode parasitic in the electric eel Electrophorus varii (Gymnotiformes: Gymnotidae), from the Brazilian Amazon.\" 1 (2023)","DOI":"10.1017\/S0022149X22000864"}],"container-title":["Journal of Parasitology"],"original-title":[],"deposited":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:27:39Z","timestamp":1791246459000},"score":1,"resource":{"primary":{"URL":"https:\/\/bioone.org\/journals\/journal-of-parasitology\/volume-110\/issue-4\/24-9\/Supplemental-Description-of-Caballerotrema-annulatum-Diesing-1850-Ostrowski-de-N%C3%BA%C3%B1ez\/10.1645\/24-9.full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,7,10]]},"references-count":78,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2024,8,1]]}},"URL":"https:\/\/doi.org\/10.1645\/24-9","relation":{},"ISSN":["0022-3395","1937-2345"],"issn-type":[{"value":"0022-3395","type":"print"},{"value":"1937-2345","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,7,10]]}}}