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Issue: Vol. 5866 No. 1: 10 Aug. 2026
Type: Article
Published: 2026-08-10
DOI: 10.11646/zootaxa.5866.1.5
Page range: 66-80
Abstract views: 422
PDF downloaded: 12

A second look at the recently described Scinax pyroinguinis Chávez, Aznaran, García-Ayachi & Catenazzi, 2023 (Anura: Hylidae)

Programa de Pós-Graduação em Sistemática; Uso e Conservação da Biodiversidade; Universidade Federal do Ceará; PPGSIS-UFC; Bloco 902 - Pici; Fortaleza; Ceará; 60020-181; Brazil
Faculdade de Filosofia Dom Aureliano Matos; Universidade Estadual do Ceará; 62930-000; Limoeiro do Norte; Ceará; Brazil
Programa de Pós-Graduação em Ecologia; Laboratório de Ecologia de Anfíbios e Répteis; Universidade Federal de Santa Catarina; Florianópolis; SC; Brazil
Museo de Zoologia; Departamento de Ecologia y Fauna; Universidad Nacional de la Amazonia Peruana-UNAP; Iquitos; Loreto; Peru
Centre de Recherche sur la Biodiversité et l’Environnement; Université Paul Sabatier; Toulouse; France
Programa de Pós-Graduação em Sistemática; Uso e Conservação da Biodiversidade; Universidade Federal do Ceará; PPGSIS-UFC; Bloco 902 - Pici; Fortaleza; Ceará; 60020-181; Brazil
Amphibia Geographic distribution Neotropical region Scinax rostratus group Taxonomic notes

Abstract

Scinax pyroinguinis Chávez, Aznaran, García-Ayachi & Catenazzi, 2023 is a medium-sized hylid frog assigned to the S. rostratus species group, recently described based on two adult males (the holotype and one paratype) from Coronel Portillo Province, Ucayali River basin, Peru. In this paper, we present new molecular data and expanded morphological data based on nine males and a one female specimen. Additionally, we report two new occurrence localities in Peru and the first record of the species in Brazil, extending the known distribution range by approximately 680 km eastward from its type locality. These findings provide new insights into the species’ diagnostic traits, sexual dimorphism, and geographic distribution.

References

  1. Araujo-Vieira, K., Lourenço, A.C., Lacerda, J.V.A., Lyra, M.L., Blotto, B.L., Ron, S.R., Baldo, D., Pereyra, M.O., Suárez-Mayorga, A.M., Baêta, D., Ferreira, R.B., Barrio-Amorós, C.L., Borteiro, C., Brandão, R.A., Brasileiro, C.A., Donnelly, M.A., Dubeux, M.J.M., Köhler, J., Kolenc, F., Leite, F.S.F., Maciel, N.M., Nunes, I., Orrico, V.G.D., Peloso, P., Pezzuti, T.L., Reichle, S., Rojas-Runjaic, F.J.M., Da Silva, H.R., Sturaro, M.J., Langone, J.A., Garcia, P.C.A., Rodrigues, M.T., Frost, D.R., Wheeler, W.C., Grant, T., Pombal Jr., J.P. & Haddad, C.F.B. & Faivovich, J. (2023) Treefrog diversity in the Neotropics: Phylogenetic relationships of Scinaxini (Anura: Hylidae: Hylinae). South American Journal of Herpetology, 27 (Special Issue), 1–143. https://doi.org/10.2994/SAJH-D-22-00038.1
  2. Azevedo-Ramos, C. & Galatti, U. (2002) Patterns of amphibian diversity in Brazilian Amazonia: Conservation implications. Biological Conservation, 103 (1), 103–111. https://doi.org/10.1016/S0006-3207(01)00129-X
  3. Bachman, S., Moat, J., Hill, A.W., de la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. ZooKeys, 150, 117–126. https://doi.org/10.3897/zookeys.150.2109
  4. Braby, M.F., Hsu, Y.F. & Lamas, G. (2024) How to describe a new species in zoology and avoid mistakes. Zoological Journal of the Linnean Society, 202 (1), 1–16. https://doi.org/10.1093/zoolinnean/zlae043
  5. Brongersma, L.D. (1933) Ein neuer Laubfrosch aus Surinam. Zoologischer Anzeiger, 103, 267–270.
  6. Cardoso, A.J. (1983) Descrição e biologia de uma nova espécie de Hyla Laurenti, 1768 (Amphibia, Anura, Hylidae). Iheringia, Série Zoologia, 62, 37–45.
  7. Catenazzi, A. & von May, R. (2014) Conservation status of amphibians in Peru. Herpetological Monographs, 28 (1), 1–23. https://doi.org/10.1655/HERPMONOGRAPHS-D-13-00003
  8. Chávez, G., Aznaran, W., García-Ayachi, L.A. & Catenazzi, A. (2023) Rising from the ashes: A new treefrog (Anura, Hylidae, Scinax) from a wildfire-threatened area in the Amazon lowlands of central Peru. Evolutionary Systematics, 7, 183–194. https://doi.org/10.3897/evolsyst.7.102425
  9. Coloma, L.A. & Duellman, W.E. (2025) Amphibians of Ecuador. Volume 2. Pipidae, Telmatobidae, Microhylidae, Dendrobatidae, Ranidae, Bufonidae, and Hylidae. CRC Press, Boca Raton, Florida, 643 pp. https://doi.org/10.1201/9781003543886
  10. Cope, E.D. (1862) Catalogues of the reptiles obtained during the explorations of the Parana, Paraguay, Vermejo and Uraguay Rivers, by Capt. Thos. J. Page, U.S.N.; and of those procured by Lieut. N. Michler, U.S. Top. Eng., Commander of the expedition conducting the survey of the Atrato River. Proceedings of the Academy of Natural Sciences of Philadelphia, 14, 346–359.
  11. Cope, E.D. (1887) Catalogue of batrachians and reptiles of Central America and Mexico. Bulletin of the United States National Museum, 32, 1–98. https://doi.org/10.5479/si.03629236.32
  12. Duellman, W.E. (1970) Hylid frogs of Middle America. Monograph of the Museum of Natural History, The University of Kansas, Lawrence, 753 pp. https://doi.org/10.5962/bhl.title.2835
  13. Duellman, W.E. (1972) South American frogs of the Hyla rostrata group (Amphibia, Anura, Hylidae). Zoologische Mededelingen, 47, 177–192.
  14. Duellman, W.E. (1973) Descriptions of new hylid frogs from Colombia and Ecuador. Herpetologica, 29, 219–227.
  15. Duellman, W.E. & Wiens, J.J. (1992) The status of the hylid frog genus Ololygon and the recognition of Scinax Wagler, 1830. Occasional Papers of the Museum of Natural History, University of Kansas, 151, 1–23.
  16. Duellman, W.E. & Wiens, J.J. (1993) Hylid frogs of the genus Scinax Wagler, 1830, in Amazonian Ecuador and Peru. Occasional Papers of the Museum of Natural History, University of Kansas, 1993, 1–57.
  17. Duellman, W.E., Marion, A.B. & Hedges, S.B. (2016) Phylogenetics, classification, and biogeography of the treefrogs (Amphibia: Anura: Arboranae). Zootaxa, 4104 (1), 1–109. https://doi.org/10.11646/zootaxa.4104.1.1
  18. Faivovich, J. (2002) A cladistic analysis of Scinax (Anura: Hylidae). Cladistics, 18, 367–393. https://doi.org/10.1111/j.1096-0031.2002.tb00157.x
  19. Faivovich, J., Haddad, C.F.B., García, P.C.A., Frost, D.R., Campbell, J.A. & Wheeler, W.C. (2005) Systematic review of the frog family Hylidae, with special reference to Hylinae: phylogenetic analysis and taxonomic revision. Bulletin of the American Museum of Natural History, 294, 1–240. https://doi.org/10.1206/0003-0090(2005)294[0001:SROTFF]2.0.CO;2
  20. Faivovich, J., Pereyra, M.O., Luna, M.C., Hertz, A., Blotto, B.L., Vásquez-Almazán, C.R., McCranie, J.R., Sánchez, D.A. & Campbell, J.A. (2018) The monophyly and relationships of several genera of Hylinae (Anura: Hylidae: Hylinae), with comments on recent taxonomic changes in hylids. South American Journal of Herpetology, 13 (1), 1–32. https://doi.org/10.2994/sajh-d-17-00115.1
  21. Fitzinger, L.J.F.J. (1843) Systema Reptilium. Fasciculus primus. Braumüller et Seidel, Wien, 106 pp. https://doi.org/10.5962/bhl.title.4694
  22. Fouquet, A., Courtois, E. & Dewynter, M. (2024) Atlas des Amphibiens de Guyane. BIOTOPE.
  23. Fowler, H.W. (1913) Amphibians and reptiles from Ecuador, Venezuela, and Yucatan. Proceedings of the Academy of Natural Sciences of Philadelphia, 65, 153–176.
  24. Frost, D.R. (2026) Amphibian Species of the World: an Online Reference (Version 6.1). American Museum of Natural History. Available from: https://amphibiansoftheworld.amnh.org/index.php (accessed 2 February 2026)
  25. Godinho, M.B.C. & da Silva, F.R. (2018) The influence of riverine barriers, climate, and topography on the biogeographic regionalization of Amazonian anurans. Scientific Reports, 8, 3427. https://doi.org/10.1038/s41598-018-21879-9
  26. Henle, K. (1991) Ololygon pedromedinae sp. nov., ein neuer Knickzehenlaubfrosch (Hylidae) aus Peru. Salamandra, 27, 76–82.
  27. Hoogmoed, M.S. & Ávila-Pires, T.C.S. (2011) On the presence of Scinax pedromedinae (Henle, 1991) (Amphibia: Anura: Hylidae) in Amazonian Brazil and northern Peru. Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, 6 (3), 263–271. https://doi.org/10.46357/bcnaturais.v6i3.609
  28. Hoorn, C., Wesselingh, F.P., ter Steege, H., Bermudez, M.A., Mora, A., Sevink, J., Sanmartín, I., Sanchez-Meseguer, A., Anderson, C.L., Figueiredo, J.P., Jaramillo, C., Riff, D., Negri, F.R., Hooghiemstra, H., Lundberg, J., Stadler, T., Särkinen, T. & Antonelli, A. (2010) Amazonia through time: Andean uplift, climate change, landscape evolution, and biodiversity. Science, 330 (6006), 927–931. https://doi.org/10.1126/science.1194585
  29. IUCN Standards and Petitions Committee (2024) Guidelines for Using the IUCN Red List Categories and Criteria. Version 16. Prepared by the Standards and Petitions Committee. IUCN, Gland, Switzerland. Available from: https://www.iucnredlist.org/documents/RedListGuidelines.pdf (accessed 3 February 2026)
  30. Jarvis, L.E., Angulo, A., Catenazzi, A., von May, R., Brown, J.L., Lehr, E. & Lewis, J. (2015) A re-assessment of priority amphibian species of Peru. Tropical Conservation Science, 8 (3), 623–645. https://doi.org/10.1177/194008291500800304
  31. Jenkins, C.N., Pimm, S.L. & Joppa, L.N. (2013) Global patterns of terrestrial vertebrate diversity and conservation. Proceedings of the National Academy of Sciences of the United States of America, 110 (28), E2602–E2610. https://doi.org/10.1073/pnas.1302251110
  32. Katoh, K. & Standley, D.M. (2013) MAFFT multiple sequence alignment software version 7: Improvements in performance and usability. Molecular Biology and Evolution, 30 (4), 772–780. https://doi.org/10.1093/molbev/mst010
  33. Köhler, G. (2011) Amphibians of Central America. Herpeton, Offenbach, 374 pp.
  34. Lescure, J. & Marty, C. (2000) Atlas des Amphibiens de Guyane. Collections Patrimoines Naturels, Paris, 45, 1–388.
  35. Lima, L.P., Bastos, R.P. & Giaretta, A.A. (2005) A new Scinax Wagler, 1830 of the S. rostratus group from central Brazil (Amphibia, Anura, Hylidae). Arquivos do Museu Nacional, 62, 505–512.
  36. Minh, B.Q., Nguyen, M.A.T. & von Haeseler, A. (2013) Ultrafast approximation for phylogenetic bootstrap. Molecular Biology and Evolution, 30 (5), 1188–1195. https://doi.org/10.1093/molbev/mst024
  37. Minh, B.Q., Schmidt, H.A., Chernomor, O., Schrempf, D., Woodhams, M.D., von Haeseler, A. & Lanfear, R. (2020) IQ-TREE 2: New models and efficient methods for phylogenetic inference in the genomic era. Molecular Biology and Evolution, 37 (5), 1530–1534. https://doi.org/10.1093/molbev/msaa015
  38. Miranda-Ribeiro, A. de (1926) Notas para servirem ao estudo dos Gymnobatrachios (Anura) Brasileiros. Arquivos do Museu Nacional, 27, 1–227.
  39. Myers, C.W. & Duellman, W.E. (1982) A new species of Hyla from Cerro Colorado, and other tree frog records and geographical notes from western Panama. American Museum Novitates, 2752, 1–32.
  40. Neves, M.O., Pereira, E.A., Rocha, L.C.F., Vasques, J.B. & Santos, P.S. (2014) Distribution extension of Scinax constrictus Lima, Bastos & Giaretta, 2004 (Amphibia, Hylidae): new state record in the Brazilian Cerrado. Herpetology Notes, 7, 745–746.
  41. Padial, J.M., Miralles, A., De la Riva, I. & Vences, M. (2010) The integrative future of taxonomy. Frontiers in Zoology, 7, 16. https://doi.org/10.1186/1742-9994-7-16
  42. Palumbi, S.R. (1996) Nucleic acids II: the polymerase chain reaction. In: Hillis, D.M., Moritz, C. & Mable, B.K. (Ed.), Molecular Systematics. 2nd Edition. Sinauer Associates, Sunderland, Massachusetts, pp. 205–247.
  43. Peters, W.C.H. (1863) Fernere Mittheilungen über neue Batrachier. Monatsberichte der Königlichen Preussische Akademie des Wissenschaften zu Berlin, 1863, 445–470.
  44. Pyburn, W.F. (1973) A new hylid from the Llanos of Colombia. Journal of Herpetology, 7 (3), 297–301. https://doi.org/10.2307/1563014
  45. Rafinesque, C.S. (1815) Analyse de la Nature, ou Tableau de l’Univers et des Corps Organisés. Jean Barravecchia, Palerme, 224 pp. https://doi.org/10.5962/bhl.title.106607
  46. Rambaut, A. (2009) FigTree v1.4.3. Available from: http://tree.bio.ed.ac.uk/software/figtree/ (accessed 29 September 2025)
  47. Rodríguez, L.O. & Duellman, W.E. (1994) Guide to the frogs of the Iquitos region, Amazonian Peru. University of Kansas Natural History Museum Special Publications, 22, 1–80. https://doi.org/10.5962/bhl.title.7937
  48. Savage, J.M. & Heyer, W.R. (1967) Variation and distribution in the tree-frog genus Phyllomedusa. Beitrage zur Neotropischen Fauna, 5 (2), 111–131. https://doi.org/10.1080/01650526709360400
  49. Spix, J.B. von (1824) Animalia nova sive Species novae Testudinum et Ranarum quas in itinere per Brasiliam annis MDCCCXVII–MDCCCXX jussu et auspiciis Maximiliani Josephi I. Bavariae Regis. F.S. Hübschmann, München. https://doi.org/10.5962/bhl.title.3665
  50. Tamura, K., Stecher, G. & Kumar, S. (2021) MEGA11: Molecular Evolutionary Genetics Analysis version 11. Molecular Biology and Evolution, 38, 3022–3027. https://doi.org/10.1093/molbev/msab120
  51. Wagler, J. (1830) Natürliches System der Amphibien, mit vorangehender Classification der Säugthiere und Vögel. Ein Beitrag zur vergleichenden Zoologie. J.G. Cotta, München, Stuttgart & Tübingen, 354 pp. https://doi.org/10.5962/bhl.title.108661
  52. Watters, J.L., Cummings, S.T., Flanagan, R.L. & Siler, C.D. (2016) Review of morphometric measurements used in anuran species descriptions and recommendations for a standardized approach. Zootaxa, 4072 (4), 477–495. https://doi.org/10.11646/zootaxa.4072.4.6
  53. Weiler, A., Núñez, K., Airaldi, K., Lavilla, E.O., Peris, S. & Baldo, D. (2013) Anfibios del Paraguay. Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Asunción–Universidad de Salamanca, San Lorenzo, 130 pp.

How to Cite

Ramos, A.R.L., Roberto, I.J., Almeida, A.P.D., Rojas, R.R., Fouquet, A. & Ávila, R.W. (2026) A second look at the recently described Scinax pyroinguinis Chávez, Aznaran, García-Ayachi & Catenazzi, 2023 (Anura: Hylidae). Zootaxa, 5866 (1), 66–80. https://doi.org/10.11646/zootaxa.5866.1.5