{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,9]],"date-time":"2026-01-09T18:23:06Z","timestamp":1767982986220,"version":"3.49.0"},"reference-count":45,"publisher":"PeerJ","license":[{"start":{"date-parts":[[2025,3,5]],"date-time":"2025-03-05T00:00:00Z","timestamp":1741132800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"abstract":"<jats:p>The recently resurrected genus <jats:italic>Daptomys<\/jats:italic> Anthony, 1929 includes poorly known small cricetid rodents that are widely distributed in tropical South America. Along with <jats:italic>Neusticomys<\/jats:italic> Anthony, 1921, these species are the most terrestrial members of the tribe, which is otherwise distinguished by adaptations that allow species to live in both aquatic and terrestrial environments. Newly collected Ecuadorean specimens provide complementary information of the craniodental and soft anatomy of <jats:italic>Daptomys<\/jats:italic>, focusing on rhinarium morphology, soft palate, stomach, caecum configuration, and other features. In addition, the phylogeny presented here, combined with species distribution models, suggests a simplified taxonomy indicating that <jats:italic>Daptomys peruviensis<\/jats:italic> (Musser &amp; Gardner, 1974) has a wide distribution extending from Venezuela to Peru. In this novel scenario, <jats:italic>Daptomys mussoi<\/jats:italic> (Ochoa &amp; Soriano, 1991) would be a junior synonym of <jats:italic>D. peruviensis<\/jats:italic>, and the application of a trinominal taxonomy appears premature.<\/jats:p>","DOI":"10.7717\/peerj.18997","type":"journal-article","created":{"date-parts":[[2025,3,5]],"date-time":"2025-03-05T08:25:33Z","timestamp":1741163133000},"page":"e18997","source":"Crossref","is-referenced-by-count":1,"title":["Soft anatomy and morphological variation in <i>Daptomys peruviensis<\/i> (Rodentia, Cricetidae), a rare ichthyomyine from the northwestern Amazonian forests"],"prefix":"10.7717","volume":"13","author":[{"given":"Jorge","family":"Brito","sequence":"first","affiliation":[{"name":"Instituto Nacional de Biodiversidad, Quito, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mateo A.","family":"Vega-Y\u00e1nez","sequence":"additional","affiliation":[{"name":"Instituto Nacional de Biodiversidad, Quito, Ecuador"},{"name":"Colegio de Ciencias Biol\u00f3gicas y Ambientales, Laboratorio de Biolog\u00eda Evolutiva, Campus Cumbay\u00e1, Universidad San Francisco de Quito, Quito, Ecuador"},{"name":"Colegio de Ciencias Biol\u00f3gicas y Ambientales, Maestr\u00eda en Ecolog\u00eda Tropical y Conservaci\u00f3n, Universidad San Francisco de Quito, Quito, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jhandry P.","family":"Guaya-Ramos","sequence":"additional","affiliation":[{"name":"Instituto Nacional de Biodiversidad, Quito, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Melanie","family":"Polo","sequence":"additional","affiliation":[{"name":"Instituto Nacional de Biodiversidad, Quito, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Claudia","family":"Koch","sequence":"additional","affiliation":[{"name":"Leibniz Institute for the Analysis of Biodiversity Change, Museum Koenig, Bonn, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nicol\u00e1s","family":"Tinoco","sequence":"additional","affiliation":[{"name":"Instituto Nacional de Biodiversidad, Quito, Ecuador"},{"name":"Secci\u00f3n de Mastozoolog\u00eda, Museo de Zoolog\u00eda, Facultad de Ciencias Exactas y Naturales, Pontificia Universidad Cat\u00f3lica del Ecuador, Quito, Ecuador"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ulyses F.J.","family":"Pardi\u00f1as","sequence":"additional","affiliation":[{"name":"Instituto Nacional de Biodiversidad, Quito, Ecuador"},{"name":"Instituto de Diversidad y Evoluci\u00f3n Austral, Puerto Madryn, Argentina"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"4443","published-online":{"date-parts":[[2025,3,5]]},"reference":[{"key":"10.7717\/peerj.18997\/ref-1","doi-asserted-by":"publisher","first-page":"1223","DOI":"10.1111\/j.1365-2664.2006.01214.x","article-title":"Assessing the accuracy of species distribution models: prevalence, kappa and the true skill statistic (TSS)","volume":"43","author":"Allouche","year":"2006","journal-title":"Journal of Applied Ecology"},{"key":"10.7717\/peerj.18997\/ref-2","first-page":"1","article-title":"Two genera of rodents from South America","volume":"383","author":"Anthony","year":"1929","journal-title":"American Museum Novitates"},{"key":"10.7717\/peerj.18997\/ref-3","doi-asserted-by":"publisher","first-page":"1527","DOI":"10.1890\/11-1930.1.1","article-title":"Uses and misuses of bioclimatic envelope modeling","volume":"93","author":"Ara\u00fajo","year":"2012","journal-title":"Ecology"},{"key":"10.7717\/peerj.18997\/ref-4","first-page":"173","article-title":"Vergleichend- und funktionell-anatomische Untersuchungen am Caecum und Colon myomorpher Nagetiere","volume":"186","author":"Behmann","year":"1973","journal-title":"Zeitschrift f\u00fcr Wissenschaftliche Zoologie"},{"key":"10.7717\/peerj.18997\/ref-5","article-title":"ecospat: spatial ecology miscellaneous methods","author":"Broennimann","year":"2023"},{"key":"10.7717\/peerj.18997\/ref-6","first-page":"1","article-title":"A survey of gross stomach morphology in New World Cricetinae (Rodentia, Muroidea), with comments on functional interpretations","volume":"146","author":"Carleton","year":"1973","journal-title":"Miscellaneous Publications, Museum of Zoology, University of Michigan"},{"key":"10.7717\/peerj.18997\/ref-7","first-page":"1","article-title":"Phylogenetic relationships in neotomine-peromyscine rodents (Muroidea) and a reappraisal of the dichotomy within New World Cricetinae","volume":"157","author":"Carleton","year":"1980","journal-title":"Miscellaneous Publications, Museum of Zoology, University of Michigan"},{"key":"10.7717\/peerj.18997\/ref-8","first-page":"1","article-title":"Systematic studies of Oryzomyine rodents (Muridae, Sigmodontinae): a synopsis of Microryzomys","volume":"191","author":"Carleton","year":"1989","journal-title":"Bulletin of the American Museum of Natural History"},{"key":"10.7717\/peerj.18997\/ref-9","doi-asserted-by":"publisher","first-page":"108923","DOI":"10.1016\/j.biocon.2020.108923","article-title":"A hippo in the room: Predicting the persistence and dispersion of an invasive mega-vertebrate in Colombia, South America","volume":"253","author":"Castelblanco-Mart\u00ednez","year":"2021","journal-title":"Biological Conservation"},{"key":"10.7717\/peerj.18997\/ref-10","doi-asserted-by":"publisher","first-page":"e0202403","DOI":"10.1371\/journal.pone.0202403","article-title":"Evaluating collinearity effects on species distribution models: an approach based on virtual species simulation","volume":"13","author":"De Marco","year":"2018","journal-title":"PLOS ONE"},{"key":"10.7717\/peerj.18997\/ref-11","doi-asserted-by":"publisher","first-page":"4302","DOI":"10.1002\/joc.5086","article-title":"WorldClim 2: new 1km spatial resolution climate surfaces for global land areas","volume":"37","author":"Fick","year":"2017","journal-title":"International Journal of Climatology"},{"key":"10.7717\/peerj.18997\/ref-12","doi-asserted-by":"publisher","first-page":"413","DOI":"10.15381\/rpb.v24i4.14068","article-title":"Range extension of the rare Peruvian fish-eating rat Neusticomys peruviensis (Rodentia: Cricetidae) in Peru","volume":"24","author":"Gonzales","year":"2017","journal-title":"Revista Peruana de Biolog\u00eda"},{"issue":"1","key":"10.7717\/peerj.18997\/ref-13","doi-asserted-by":"publisher","first-page":"27","DOI":"10.1006\/qres.1998.2020","article-title":"Late Quaternary vegetation and climate change in the Amazon Basin based on a 50 000year pollen record from the Amazon Fan, ODP Site 932","volume":"51","author":"Haberle","year":"1999","journal-title":"Quaternary Research"},{"key":"10.7717\/peerj.18997\/ref-14","doi-asserted-by":"publisher","first-page":"111","DOI":"10.1007\/BF01731581","article-title":"A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequences","volume":"16","author":"Kimura","year":"1980","journal-title":"Journal of Molecular Evolution"},{"key":"10.7717\/peerj.18997\/ref-15","volume-title":"Handbook of zoology. Mammalia. Comparative anatomy of the gastrointestinal tract in eutheria; taxonomy, biogeography and food. Afrotheria, Xenarthra and Euarchontoglires","volume":"Volume 1","author":"Langer","year":"2017"},{"issue":"7","key":"10.7717\/peerj.18997\/ref-16","doi-asserted-by":"publisher","first-page":"788","DOI":"10.1111\/j.1600-0587.2013.07585.x","article-title":"How to assess the prediction accuracy of species presence\u2013absence models without absence data?","volume":"36","author":"Li","year":"2013","journal-title":"Ecography"},{"key":"10.7717\/peerj.18997\/ref-17","article-title":"A modular system for evolutionary analysis","author":"Maddison","year":"2023"},{"key":"10.7717\/peerj.18997\/ref-18","doi-asserted-by":"publisher","first-page":"591","DOI":"10.2307\/1267205","article-title":"Generalized inverses, ridge regression, biased linear estimation, and nonlinear estimation","volume":"12","author":"Marquardt","year":"1970","journal-title":"Technometrics"},{"key":"10.7717\/peerj.18997\/ref-19","doi-asserted-by":"publisher","first-page":"199","DOI":"10.15381\/rpb.v22i2.11354","article-title":"Biodiversidad de la Zona Reservada Sierra del Divisor (Per\u00fa): una visi\u00f3n desde los mam\u00edferos peque\u00f1os","volume":"22","author":"Medina","year":"2015","journal-title":"Revista Peruana de Biolog\u00eda"},{"key":"10.7717\/peerj.18997\/ref-20","first-page":"1","article-title":"A new species of the ichthyomyine Daptomys from Peru","volume":"2537","author":"Musser","year":"1974","journal-title":"American Museum Novitates"},{"key":"10.7717\/peerj.18997\/ref-21","doi-asserted-by":"publisher","first-page":"368","DOI":"10.1111\/ecog.01881","article-title":"sdm: a reproducible and extensible R platform for species distribution modelling","volume":"39","author":"Naimi","year":"2016","journal-title":"Ecography"},{"key":"10.7717\/peerj.18997\/ref-22","doi-asserted-by":"publisher","first-page":"191","DOI":"10.1111\/j.1600-0587.2013.00205.x","article-title":"Where is positional uncertainty a problem for species distribution modelling","volume":"37","author":"Naimi","year":"2014","journal-title":"Ecography"},{"key":"10.7717\/peerj.18997\/ref-23","doi-asserted-by":"publisher","first-page":"97","DOI":"10.2307\/1381983","article-title":"A new species of water rat, genus Neusticomys Anthony, from the Andes of Venezuela","volume":"72","author":"Ochoa","year":"1991","journal-title":"Journal of Mammalogy"},{"issue":"3","key":"10.7717\/peerj.18997\/ref-24","doi-asserted-by":"publisher","first-page":"858","DOI":"10.1093\/jmammal\/gyaa011","article-title":"A revision of Neusticomys peruviensis (Rodentia: Cricetidae) with the description of a new subspecies","volume":"101","author":"Pacheco","year":"2020","journal-title":"Journal of Mammalogy"},{"key":"10.7717\/peerj.18997\/ref-25","first-page":"577","article-title":"Annotated checklist of the nonflying mammals at Pakitza. Manu Reserve Zone. Manu National Park. Per\u00fa","volume-title":"Manu the biodiversity of southeastern Peru","author":"Pacheco","year":"1996"},{"issue":"9","key":"10.7717\/peerj.18997\/ref-26","doi-asserted-by":"publisher","first-page":"e21760","DOI":"10.1002\/jmor.21760","article-title":"Comparative morphology of the rhinarium and upper lip in sigmodontine rodents: refined nomenclature, intertribal variation in a phylogenetic framework, and functional inferences","volume":"285","author":"Pardi\u00f1as","year":"2024","journal-title":"Journal of Morphology"},{"issue":"3","key":"10.7717\/peerj.18997\/ref-27","doi-asserted-by":"publisher","first-page":"835","DOI":"10.1093\/jmammal\/gyaa023","article-title":"Gross stomach morphology in akodontine rodents (Cricetidae: Sigmodontinae: Akodontini): a reappraisal of its significance in a phylogenetic context","volume":"101","author":"Pardi\u00f1as","year":"2020","journal-title":"Journal of Mammalogy"},{"key":"10.7717\/peerj.18997\/ref-28","doi-asserted-by":"publisher","first-page":"1010","DOI":"10.1093\/jmammal\/gyx074","article-title":"The conundrum of subspecies: morphological diversity among desert populations of the California vole (Microtus californicus, Cricetidae)","volume":"98","author":"Patton","year":"2017","journal-title":"Journal of Mammalogy"},{"issue":"5","key":"10.7717\/peerj.18997\/ref-29","doi-asserted-by":"publisher","first-page":"873","DOI":"10.1644\/1545-1542(2005)86%5b873:ANSONI","article-title":"A new species of Neusticomys (Ichthyomyini, Sigmodontinae) from central Brazilian Amazonia","volume":"86","author":"Percequillo","year":"2005","journal-title":"Journal of Mammalogy"},{"key":"10.7717\/peerj.18997\/ref-30","first-page":"1","article-title":"The anatomy of the diastemal palate in microtine rodents","volume":"86","author":"Quay","year":"1954","journal-title":"Miscellaneous Publications Museum of Zoology, University of Michigan"},{"issue":"3","key":"10.7717\/peerj.18997\/ref-31","doi-asserted-by":"publisher","first-page":"1392","DOI":"10.1002\/ece3.7146","article-title":"NGSpeciesID: DNA barcode and amplicon consensus generation from long-read sequencing data","volume":"11","author":"Sahlin","year":"2021","journal-title":"Ecology and Evolution"},{"key":"10.7717\/peerj.18997\/ref-32","doi-asserted-by":"publisher","first-page":"e14319","DOI":"10.7717\/peerj.14319","article-title":"Systematics and diversification of the Ichthyomyini (Cricetidae, Sigmodontinae) revisited: Evidence from molecular, morphological, and combined approaches","volume":"11","author":"Salazar-Bravo","year":"2023","journal-title":"PeerJ"},{"key":"10.7717\/peerj.18997\/ref-33","doi-asserted-by":"publisher","first-page":"663","DOI":"10.1093\/jmammal\/gyw078","article-title":"2016 Guidelines of the American Society of Mammalogists for the use of wild mammals in research and education","volume":"97","author":"Sikes","year":"2016","journal-title":"Journal of Mammalogy"},{"issue":"3","key":"10.7717\/peerj.18997\/ref-34","doi-asserted-by":"publisher","first-page":"149","DOI":"10.1111\/j.1095-8312.1993.tb00924.x","article-title":"The diversification of South American murid rodents: evidence from mitochondrial DNA sequence data for the akodontine tribe","volume":"50","author":"Smith","year":"1993","journal-title":"Biological Journal of the Linnean Society"},{"key":"10.7717\/peerj.18997\/ref-35","doi-asserted-by":"publisher","first-page":"1","DOI":"10.17161\/bi.v2i0.4","article-title":"Interpretation of models of fundamental ecological niches and species\u2019 distributional areas","volume":"2","author":"Soberon","year":"2005","journal-title":"Biodiversity Informatics"},{"key":"10.7717\/peerj.18997\/ref-36","doi-asserted-by":"publisher","first-page":"13","DOI":"10.3158\/0015-0754(2006)110[13:MOTMBR]2.0.CO;2","article-title":"Mammals of the Manu Biosphere Reserve","volume":"110","author":"Solari","year":"2006","journal-title":"Fieldiana Zoology"},{"issue":"11","key":"10.7717\/peerj.18997\/ref-37","doi-asserted-by":"publisher","first-page":"eaax4718","DOI":"10.1126\/sciadv.aax4718","article-title":"Quaternary climate changes as speciation drivers in the Amazon floodplains","volume":"6","author":"Thom","year":"2020","journal-title":"Science Advances"},{"key":"10.7717\/peerj.18997\/ref-38","first-page":"333","article-title":"On some mammals from Central Peru","volume":"23","author":"Thomas","year":"1893","journal-title":"Proceedings of the Zoological Society of London"},{"key":"10.7717\/peerj.18997\/ref-39","volume-title":"Monitoreo Biol\u00f3gico Yasun\u00ed: Mam\u00edferos","volume":"Volumen 2","author":"Tirira","year":"2018"},{"key":"10.7717\/peerj.18997\/ref-40","doi-asserted-by":"publisher","first-page":"31","DOI":"10.1007\/s10539-021-09805-2","article-title":"Defining the niche for niche construction: evolutionary and ecological niches","volume":"36","author":"Trappes","year":"2021","journal-title":"Biology & Philosophy"},{"key":"10.7717\/peerj.18997\/ref-41","doi-asserted-by":"publisher","first-page":"W232","DOI":"10.1093\/nar\/gkw256","article-title":"W-IQ-TREE: a fast online phylogenetic tool for maximum likelihood analysis","volume":"44","author":"Trifinopoulos","year":"2016","journal-title":"Nucleic Acids Research"},{"key":"10.7717\/peerj.18997\/ref-42","volume-title":"Evolution of the alimentary system in myomorph rodents","author":"Vorontsov","year":"1967"},{"key":"10.7717\/peerj.18997\/ref-43","first-page":"1","article-title":"The hamsters (Cricetidae) of the world fauna. Part 1. Morphology and ecology","volume-title":"Fauna of the USSR, New Series M\u00b0125, Mammals","volume":"3","author":"Vorontsov","year":"1982"},{"key":"10.7717\/peerj.18997\/ref-44","first-page":"259","article-title":"Systematics and ecology of Ichthyomyine rodents (Muroidea): patterns of morphological evolution in a small adaptive radiation","volume":"188","author":"Voss","year":"1988","journal-title":"Bulletin of the American Museum of Natural History"},{"key":"10.7717\/peerj.18997\/ref-45","first-page":"279","article-title":"Tribe Ichthyomyini Vorontsov, 1959","volume-title":"Mammals of South America, Rodents Vol. 2","author":"Voss","year":"2015"}],"container-title":["PeerJ"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/peerj.com\/articles\/18997.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/peerj.com\/articles\/18997.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/peerj.com\/articles\/18997.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/peerj.com\/articles\/18997.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,3,5]],"date-time":"2025-03-05T08:25:45Z","timestamp":1741163145000},"score":1,"resource":{"primary":{"URL":"https:\/\/peerj.com\/articles\/18997"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,3,5]]},"references-count":45,"alternative-id":["10.7717\/peerj.18997"],"URL":"https:\/\/doi.org\/10.7717\/peerj.18997","archive":["CLOCKSS","LOCKSS","Portico"],"relation":{},"ISSN":["2167-8359"],"issn-type":[{"value":"2167-8359","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,3,5]]},"article-number":"e18997"}}