Abstract
Several studies of arboreal anuran species show morphological specializations for clinging onto narrow substrates. However, little is known about these capacities in non-specialized anurans, which is crucial to understand the initial phases of adaptation to a new niche. To assess the functional requirements related to the evolution of arboreality in anurans we analyzed climbing performance, and correlated anatomical traits, in the terrestrial toad Rhinella arenarum, a species choose as a proxy for the ancestral condition regarding the evolution of this specialized niche. We studied the impact of a substrate of wooden rods with different diameters, arrangements, and slopes on locomotion, grasping, and climbing with a comparative framework. Animals were confronted with climbing tests, video recording their behaviors. Preserved specimens were dissected to assess limb myology, osteology, and tendons’ characteristics. Our results show that how terrestrial toad R. arenarum climbs is different from those displayed by specialized tree frogs. Animals flexed their fingers and toes, grasping the substrate displaying hookings and partial graspings. The palm was scarcely involved in the grip, as in specialized anurans. These actions were performed although flexor and extensor muscles of the digits are highly conserved and generalized. Further, we formally assess the evolutionary history of ecological and anatomical traits related to climbing among Rhinella species to improving the comprehension of the relation between morphofunctional patterns and behavioral climbing skills. Our experiments revealed that this terrestrial toad possesses unexpected climbing capacities, suggesting a way in which evolution of new niches could have developed in the evolution of anurans.
Similar content being viewed by others
Data Availability
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.
References
Abdala, V., Manzano, A. S., Tulli, M. J., & Herrel, A. (2009). The tendinous patterns in the palmar surface of the lizard manus: Tests of functional consequences for grasping ability. The Anatomical Record, 292, 842–853.
Almendáriz, A., Cisneros-Heredia, D., Jungfer, K.-H., Coloma, L. A., & Ron, S. (2004). Rhinella festae. The IUCN Red List of THreatened Species, 2004, e.T54876A11205881.
Angulo, A., Reichle, S., Köhler, J., & Córdova-Santa Gadea, J. (2004). Rhinella veraguensis. The IUCN Red List of Threatened Species, 2004, e.T54792A11192672.
Anzeraey, A., Aumont, M., Decamps, T., Herrel, A., & Pouydebat, E. (2017). The effect of food properties on grasping and manipulation in the aquatic frog Xenopus laevis. The Journal of Experimental Biology, 220, 4486–4491.
Aubret, F., Bonnet, X., & Shine, R. (2007). The role of adaptive plasticity in a major evolutionary transition: Early aquatic experience affects locomotor performance of terrestrial snakes. Functional Ecology, 21, 1154–1161.
Azevedo-Ramos, C., Hoogmoed, M., Coloma, L. A., Ron, S., Castro, F., Rueda, J. V., Cisneros-Heredia, D., Icochea, J., & Angulo, A. (2004). Rhinella dapsilis. The IUCN Red List of Threatened Species, 2004, e.T54625A11177070.
Bastos, R., Pavan, D., & Silvano, D. (2004). Rhinella ocellata. The IUCN Red List of Threatened Species, 2004, e.T54720A11192773.
Bateson, P. (2017). Adaptability and evolution. Interface Focus, 7, 20160126. https://doi.org/10.1098/rsfs.2016.0126
Beltman, J. B., Haccou, P., & Ten Cate, C. (2004). Learning and colonization of new niches: A first step toward speciation. Evolution, 58(1), 35–46.
Blotto, B., Pereyra, M. O., Grant, T., & Faivovich, J. (2020). Hand and foot musculature of Anura: Structure, homology, terminology, and synapomorphies for major clades. Bulletin of the American Museum of Natural History, 443, 155. https://doi.org/10.1206/0003-0090.443.1.1
Burton, T. C. (1998). Are the distal extensor muscles of the fingers of Anurans an adaptation to arboreality? Journal of Herpetology, 32, 611–617.
CalPhotos Photo Database. (2020). Rhinella castaneotica. BNHM Berkeley Natural History Museums, University of California, Berkeley. https://calphotos.berkeley.edu/cgi/img_query?enlarge=0000+0000+1009+1826. Accessed 3 June 2020.
CalPhotos Photo Database. (2020). Rhinella manu. BNHM Berkeley Natural History Museums, University of California, Berkeley. https://calphotos.berkeley.edu/cgi/img_query?enlarge=0000+0000+1009+1823. Accessed 3 June 2020.
CalPhotos Photo Database. (2020). Rhinella veraguensis. BNHM Berkeley Natural History Museums,University of California, Berkeley. https://calphotos.berkeley.edu/cgi/img_query?enlarge=1111+1111+1111+1354. Accessed 11 June 2020.
CalPhotos Photo Database. (2020). Rhinella ocellata. BNHM Berkeley Natural History Museums, University of California, Berkeley. https://calphotos.berkeley.edu/cgi/img_query?enlarge=1111+1111+1111+6041. Accessed 11 June 2020.
CalPhotos Photo Database. (2020). Rhinella granulosa. BNHM Berkeley Natural History Museums, University of California, Berkeley. https://calphotos.berkeley.edu/cgi/img_query?enlarge=1111+1111+1111+2971. Accessed 3 June 2020.
CalPhotos Photo Database. (2020). Rhinella arequipensis. BNHM Berkeley Natural History Museums, University of California, Berkeley. https://calphotos.berkeley.edu/cgi/img_query?seq_num=86671&one=T. Accessed 14 June 2020.
Chaparro, J. C., Pramuk, J. B., & Gluesenkamp, A. G. (2007). A new species of arboreal Rhinella (Anura: Bufonidae) from cloud forest of southeastern Peru. Herpetologica, 63(2), 203–212.
Chuliver Pereyra, M. (2018). Ontogenia del aparato locomotor de Physalaemus biligonigerus (Anura: Leptodactylidae): Bases para comprender la función locomotora y su origen en los anuros [Ontogeny of the locomotor apparatus of Physalaemus biligonigerus (Anura: Leptodactylidae): Basis for understanding locomotor function and its origin in anurans]. PhD Thesis. Universidad Nacional de Córdoba, Argentina.
Coloma, L. A., Páez-Rosales, N., Ortiz, D. A., Frenkel, C., Ron, S. R., & Pazmiño-Armijos, G. (2018). Rhinella marina. In S. R. Ron, A. Merino-Viteri, & D. A. Ortiz (Eds.), Anfibios del Ecuador. Version 2019.0. Museo de Zoología.Pontificia Universidad Católica del Ecuador.
Correa, C., Sallaberry, M., Jara-Arancio, P., Lobos, G., Soto, E., & Méndez, M. A. (2008). Amphibia, Anura, Bufonidae, Rhinella atacamensis: Altitudinal distribution extension, new records and geographic distribution map. Check List, 4(4), 478–484.
Cusi, J. C., Moravec, J., Lehr, E., & Gvoždík, V. (2017). A new species of semiarboreal toad of the Rhinella festae group (Anura, Bufonidae) from the Cordillera Azul National Park, Peru. ZooKeys, 673, 21–47. https://doi.org/10.3897/zookeys.673.13050
Dagg, A. I., & Windsor, D. E. (1972). Swimming in northern terrestrial mammals. Canadian Journal of Zoology, 50, 117–130.
Daneri, F., Papini, M. R., & Muzio, R. N. (2007). Common toads (Bufo arenarum) learn to anticipate and avoid hypertonic saline solutions. Journal of Comparative Psychology, 121(4), 419–427. https://doi.org/10.1037/0735-7036.121.4.419
Daneri, M. F., Casanave, E., & Muzio, R. N. (2011). Control of spatial orientation in terrestrial toads (Rhinella arenarum). Journal of Comparative Psychology, 125(3), 296–307. https://doi.org/10.1037/a0024242
de Freitas, M. A., Santos, E. M., de Amorim, F. O., & Lima de Almeida, G. V. (2018). First record of Rhinella ocellata (Günther, 1858) for the state of Bahia, northeastern Brazil (Anura: Bufonidae). Herpetology Notes, 11, 17–18.
De la Riva, I. (2002). Taxonomy and distribution of the South American toads, Bufo poeppigii Tschudi, 1845 (Amphibia, Anura, Bufonidae). Graellsia, 58(1), 49–57.
de Noronha, J. C., Barros, A. B., Da Paixao, E. C., Almeida, E. J., Miranda, R. M., & Rodrigues, D. J. (2013). Climbing behaviour of terrestrial bufonids in the genus Rhinella. Herpetological Bulletin, 124, 22–23.
Díaz-Páez, H., & Ortiz, J. C. (2003). Evaluación del estado de conservación de los anfibios en Chile. Revista Chilena De Historia Natural, 76(3), 509–525.
Diogo, R. (2017). Evolution driven by organismal behavior. A unifying view of life, function, form, mismatches and trends (1st ed.). . Springer.
Dunlap, D. G. (1960). The comparative myology of the pelvic appendage in the salientia. Journal of Morphology, 106, 1–76.
Frenkel, C. (2019). Rhinella festae. In S. R. Ron, A. Merino-Viteri, & D. A. Ortiz (Eds.), Anfibios del Ecuador. Version 2019.0. Museo de Zoología.Pontificia Universidad Católica del Ecuador.
FLICKR Photo Database (2020). Rhinella humboldti. FLICKR. https://www.flickr.com/photos/125903191@N07/15329580297. Accessed 3 June 2020.
FLICKR Photo Database (2020). Rhinella schneideri. FLICKR. https://www.flickr.com/photos/cdtimm/8075491625. Accessed 3 June 2020.
Gaupp, E. (1896). Anatomie des Frosches. Braunschweig: Friedrich Vieweg und Sohn.
GBIF Global Biodiversity Information Facility, Secretariat (2020). Rhinella limensis. GBIF Backbone Taxonomy. Checklist dataset. Accessed via GBIF.org on 3 June 2020. https://doi.org/10.15468/39omei
Gomes, F. R., Rezende, E. L., Grizante, M. B., & Navas, C. A. (2009). The evolution of jumping performance in anurans: Morphological correlates and ecological implications. Journal of Evolutionary Biology, 22, 1088–1097.
Gosá, A. (2008). Explotación del sustrato vertical por los anuros (Amphibia) del bosque atlántico. Naturzale, Cuadernos De Ciencias Naturales, 19, 131–148.
Gould, S. J., & Vrba, E. S. (1982). Exaptation-A missing term in the science of form. Paleobiology, 8, 4–15.
Granda-Rodríguez, H. D., Portillo-Mozo, A. D., & Renjifo, J. M. (2008). Uso de hábitat en Atelopus laetissimus (Anura: Bufonidae) en una localidad de la Sierra Nevada de Santa Marta, Colombia. Herpetotrópicos, 4, 87–93.
Grant, T., & Bolívar, G. W. (2014). A new species of semiarboreal toad with a salamander-like ear (Anura: Bufonidae: Rhinella). Herpetologica, 70, 198–210.
Herrel, A., Perrenoud, M., Decamps, T., Abdala, V., Manzano, A., & Pouydebat, E. (2013). The effect of substrate diameter and incline on locomotion in an arboreal frog. The Journal of Experimental Biology, 216, 3599–3605.
Hildebrand, M., & Goslow, G. (2001). Analysis of vertebrate structure. John Wiley.
Hudson, C. M., Gregory, P. B., & Shine, R. (2016). Athletic anurans: The impact of morphology, ecology and evolution on climbing ability in invasive cane toads. Biological Journal of the Linnean Society, 119(4), 992–999.
Hyams, S. E., Jayne, B. C., & Cameron, G. N. (2012). Arboreal habitat structure affects locomotor speed and perch choice of whitefooted mice (Peromyscus leucopus). Journal of Experimental Zoology, 317A, 540–551.
IUCN. (2014). International Union for Conservation of Nature and Natural Resources Red List of threatened species. Version 2014.3. IUCN.
IUCN SSC Amphibian Specialist Group. (2014). Rhinella limensis. The IUCN Red List of Threatened Species, 2014, e.T54691A43476884.
IUCN SSC Amphibian Specialist Group. (2015). Rhinella castaneotica. The IUCN Red List of Threatened Species, 2015, e.T54603A61393360.
IUCN SSC Amphibian Specialist Group. (2015). Rhinella arunco. The IUCN Red List of Threatened Species, 2015, e.T54577A79810607.
IUCN SSC Amphibian Specialist Group. (2018). Rhinella vellardi. The IUCN Red List of Threatened Species, 2018, e.T54791A89197536.
IUCN SSC Amphibian Specialist Group. (2018). Rhinella nesiotes. The IUCN Red List of Threatened Species, 2018, e.T54715A89197422.
IUCN SSC Amphibian Specialist Group. (2020). Rhinella poeppigii. The IUCN Red List of Threatened Species, 2020, e.T54735A61394155.
IUCN SSC Amphibian Specialist Group. (2020). Rhinella arequipensis. The IUCN Red List of Threatened Species, 2020, e.T88991897A89226267. https://doi.org/10.2305/IUCN.UK.2020-1.RLTS.T88991897A89226267.en
Jetz, W., & Pyron, R. A. (2018). The interplay of past diversification and evolutionary isolation with present imperilment across the amphibian tree of life. Nature Ecology and Evolution, 2(5), 850–858. https://doi.org/10.1038/s41559-018-0515-5
Karantanis, N.-E., Rychlik, L., Herrel, A., & Youlatos, D. (2017). Arboreal gaits in three sympatric rodents Apodemus agrarius, Apodemus flavicollis (Rodentia, Muridae) and Myodes glareolus (Rodentia, Cricetidae). Mammalian Biology—Zeitschrift Für Säugetierkunde, 83, 51–63. https://doi.org/10.1016/j.mambio.2016.12.004
Lauder, G. V. (1996). The argument from design. In M. R. Rose & G. V. Lauder (Eds.), Adaptation (pp. 55–91). Academic Press.
Lavilla, E. O., Ponssa, M. L., Baldo, D., Basso, N., Bosso, A., Cespedez, J., Chebez, J. C., Faivovich, J., Ferrari, L., Lajmanovich, R., Langone, J. A., Peltzer, P., Úbeda, C., Vaira, M., & Vera Candioti, F. (2000). Categorización de los Anfibios de Argentina. In E. O. Lavilla, E. Richard, & G. J. Scrocchi (Eds.), Categorización de los Anfibios y Reptiles de la República Argentina (pp. 11–34). Asociación Herpetológica Argentina.
Lehr, E., Kohler, G., Aguilar, C., & Ponce, E. (2001). New Species of Bufo (Anura: Bufonidae) from Central Peru. Copeia, 2001, 216–223.
Lindquist, E. D., Sapoznick, S. A., Griffith-Rodriguez, E. J., Johantgen, P. B., & Criswell, J. M. (2007). Nocturnal position in the Panamanian golden frog Atelopus zeteki (Anura, Bufonidae), with notes on fluorescent pigment tracking. Phyllomedusa, 6, 37–44.
Losos, J. B., Schoener, T. W., & Spiller, D. A. (2004). Predator-induced behaviour shifts and natural selection in field-experimental lizard populations. Nature, 432, 505–508.
Maddison, W. P., & Maddison, D. R. (2019). Mesquite: A modular system for evolutionary analysis. Version 3.61. Retrieved from http://www.mesquiteproject.org
Manzano, A. S., Abdala, V., & Herrel, A. (2008). Morphology and function of the forelimb in arboreal frogs: Specializations for grasping ability? Journal of Anatomy, 213, 296–307.
Manzano, A. S., Fabrezi, M., & Vences, M. (2007). Intercalary elements, treefrogs, and the early differentiation of a complex system in the Neobatrachia. Anatomical Record, 290, 1551–1567.
Manzano, A. S., Fontanarrosa, G., & Abdala, V. (2018). Manual and pedal grasping among anurans: A review of relevant concepts with empirical approaches. Biological Journal of the Linnean Society, 127, 598–610.
Manzano, A. S., Fontanarrosa, G., Prieto, Y., & Abdala, V. (2017). La prensilidad en anfibios y reptiles: Perspectivas evolutivas basadas en la anatomía y la función. In V. Abdala, A. Manzano, & A. I. Vassallo (Eds.), Morfología de Vertebrados: Hacia una integración de conceptos, metodologías y grupos de investigación del país (pp. 59–81). EUDEM Editorial Universitaria de Mar del Plata.
Manzano, A. S., Herrel, A., Fabre, A. C., & Abdala, V. (2017). Variation in brain anatomy in frogs and its possible bearing on their locomotor ecology. Journal of Anatomy, 231, 38–58.
Müller, G. B., & Wagner, G. P. (1991). Novelty in evolution: Restructuring the concept. Annual Review of Ecology and Systematics, 22, 229–256.
Muzio, R. N., Pistone Creydt, V., Iurman, M., Rinaldi, M., Sirani, B., & Papini, M. R. (2011). Incentive or habit learning in amphibians? PLoS ONE, 6(11), e25798. https://doi.org/10.1371/journal.pone.0025798
Muzio, R. N., Segura, E. T., & Papini, M. R. (1992). Effect of schedule and magnitude of reinforcement on instrumental acquisition and extinction in the toad, Bufo arenarum. Learning and Motivation, 23, 406–429.
Napier, J. R. (1993). Hands. Princeton University Press.
Odling-Smee, J., Laland, K., & Feldman, M. (2003). Niche construction: The neglected process in evolution. Princeton University Press.
Ortiz, D. A., & Coloma, L. A. (2018). Rhinella dapsilis. In S. R. Ron, A. Merino-Viteri, & D. A. Ortiz (Eds.), Anfibios del Ecuador. Version 2019.0. Museo de Zoología.Pontificia Universidad Católica del Ecuador.
Ortiz, D. A., Ron, S. R., Coloma, L. A., & Páez-Rosales, N. (2018). Rhinella margaritifera. In S. R. Ron, A. Merino-Viteri, & D. A. Ortiz (Eds.), Anfibios del Ecuador. Version 2019.0. Museo de Zoología.Pontificia Universidad Católica del Ecuador.
Padial, J. M., Chaparro, J. C., Köhler, J., & De la Riva, I. (2009). Rediscovery, resurrection and redescription of Rhinella leptoscelis (Boulenger, 1912) (Anura: Bufonidae). Zootaxa, 2115, 56–64.
Pereyra, M. O., Baldo, D., Blotto, B. L., Iglesias, P. P., Thomé, M. T. C., Haddad, C. F. B., Barrio-Amorós, C., Ibáñez, R., & Faivovich, J. (2015). Phylogenetic relationships of toads of the Rhinella granulosa group (Anura: Bufonidae): A molecular perspective with comments on hybridization and introgression. Cladistics, 32(1), 36–53. https://doi.org/10.1111/cla.12110
Pizzatto, L., Both, C., Brown, G., & Shine, R. (2017). The accelerating invasion: Dispersal rates of cane toads at an invasion front compared to an already-colonized location. Evolutionary Ecology, 31, 533–545. https://doi.org/10.1007/s10682-017-9896-1
Pramuk, J. B., Robertson, T., Sites, J. W., Jr., & Noonan, B. P. (2008). Around the world in 10 million years: Biogeography of the nearly cosmopolitan true toads (Anura: Bufonidae). Global Ecology and Biogeography, 17, 72–83.
Puddington, M. M., Papini, M. R., & Muzio, R. N. (2018). Duration of extinction trials as a determinant of instrumental extinction in terrestrial toads (Rhinella arenarum). Animal Cognition, 21, 165–174. https://doi.org/10.1007/s10071-017-1149-8
Rezende Oliveira, S., Fachi, M. B., Silva, D. A., & Morais, A. R. (2017). Predation on Rhinella mirandaribeiroi (Gallardo, 1965) (Anura; Bufonidae) by a Neotropical snake, including a list with predation events for species of the genus Rhinella. Herpetological Notes, 10, 151–155.
Rodríguez, L. O., Cordova, J. H., & Icochea, J. (1993). Lista preliminar de los anfibios del Peru. Publicaciones Del Museo De Historia Natural U.n.m.s.m., 45, 1–22.
SIB Sistema de Información de Biodiversidad (2020). Rhinella spinulosa. Administración de Parques Nacionales, Argentina. Checklist database. Accessed 3 June 2020. https://sib.gob.ar/especies/rhinella-spinulosa
Silvano, D., Azevedo-Ramos, C., La Marca, E., Narvaes, P., di Tada, I., Baldo, D., Solís, F., Ibáñez, R., Jaramillo, C., Fuenmayor, Q., & Hardy, J. (2010). Rhinella granulosa (errata version published in 2016). The IUCN Red List of Threatened Species, 2010, e.T54655A86595684.
Sotelo, M. I., Bingman, V. P., & Muzio, R. N. (2015). Goal orientation by geometric and feature cues: Spatial learning in the terrestrial toad Rhinella arenarum. Animal Cognition, 18(1), 315–323. https://doi.org/10.1007/s10071-014-0802-8
Sotelo, M. I., Bingman, V. P., & Muzio, R. N. (2017). Slope-based and geometric encoding of a goal location by the terrestrial toad (Rhinella arenarum). Journal of Comparative Psychology, 131, 362–369. https://doi.org/10.1037/com0000084
Sotelo, M. I., Bingman, V. P., & Muzio, R. N. (2019). Mating call as a spatial signal and its brain representation in the terrestrial toad Rhinella arenarum. Brain, Behavior and Evolution, 94, 7–17. https://doi.org/10.1159/000504122
Sustaita, D., Pouydebat, E., Manzano, A., Abdala, V., Hertel, F., & Herrel, A. (2013). Getting a grip on tetrapod grasping: Form, function, and evolution. Biological Reviews of the Cambridge Philosophical Society, 88, 380–405.
Thomas, D., Hiscox, J., & Dixon, B. J. (2016). 3D scanning and printing skeletal tissues for anatomy education. Journal of Anatomy, 229(3), 473–481.
Toledo, L. F., Ribeiro, R. S., & Haddad, C. F. B. (2007). Anurans as prey: An exploratory analysis and size relationships between predators and their prey. Journal of Zoology, 271, 170–177.
Torres-Suárez, O. L., & Vargas-Salina, F. (2014). Rhinella humboldti (Gallardo 1965). Catálogo De Anfibios y Reptiles De Colombia, 2(2), 19–23.
Tulli, M. J., Abdala, V., & Cruz, F. B. (2012). Effects of different substrates on the sprint performance of lizards. The Journal of Experimental Biology, 215, 774–784.
Urra, F. A. (2013). Síntesis del conocimiento actual sobre los sapos Rhinella atacamensis, R. arunco y R. spinulosa. La Chiricoca, 16, 4–15.
Varela-Jaramillo, A., & Ron, S. R. (2018). Rhinella poeppigii. In S. R. Ron, A. Merino-Viteri, & D. A. Ortiz (Eds.), Anfibios del Ecuador. Version 2019.0. Museo de Zoología.Pontificia Universidad Católica del Ecuador.
Vassallo, A. I., Becerra, F., Echeverría, A. I., Díaz, A. O., Longo, M. V., Cohen, M., & Buezas, G. N. (2019). Analysis of the form-function relationship: Digging behavior as a case study. Journal of Mammalian Evolution. https://doi.org/10.1007/s10914-019-09492-7
Wagley, R. (2019). Species Account Citation: AmphibiaWeb Rhinella schneideri: Cururu Toad, Rococo Toad. University of California.
Wassersug, R. J. (1976). A procedure for differential staining of cartilage and bone in whole formalin-fixed vertebrates. Staining Techniques, 51, 131–134.
West-Eberhard, M. J. (2005). Developmental plasticity and the origin of species differences. Proceedings of the National Academy of Sciences (USA), 102, 6543–6549.
Williams León de Castro, M. W., & Rey Sánchez, D. R. (2014). Primer registro de la presencia y reproducción del anuro Rhinella poeppigii (Tschudi, 1845) en un área antrópica del Departamento de Lima, Perú. Ecología Aplicada, 13(2), 109–115.
Wyles, J. S., Kunkel, J. G., & Wilson, A. C. (1983). Birds, behavior, and anatomical evolution. Proceedings of the National Academy of Sciences USA, 80(14), 4394–4397.
Acknowledgements
María Florencia Daneri helped in the early design of the experimental device and Marcelo Ibarzabal helped to build it. Federico Becerra helped capturing specimens in the field. Martina Vassallo helped during photograph of behavioral recording. Silvia Etcheverry helped with the specimens of the herpetological collection of CICyTTP-CONICET (Diamante). Martín Pereyra (IBS CONICET, Argentina) and Julián Faivovich (MACN CONICET, Argentina) suggested useful literature. We are also grateful to Mariana Chuliver Pereyra and Miriam C. Vera for contributing with photos used in this study.
Funding
This research was funded in part by Grants PICT 4300-2016 (FONCYT) and UBACYT 20020160100068BA (University of Buenos Aires), Argentina, to RNM; by Grants PIP 2014-2016 (CONICET) No. 11220130100375 and EXA918/18 (University of Mar del Plata) to AIV; and by Grants PICT 2772-2016, PICT 0832-2018 (FONCYT) and PIP 0389 (CONICET) to VA.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Conflict of interest
The authors declare that they have no conflict of interest.
Rights and permissions
About this article
Cite this article
Vassallo, A.I., Manzano, A., Abdala, V. et al. Can Anyone Climb? The Skills of a Non-specialized Toad and its Bearing on the Evolution of New Niches. Evol Biol 48, 293–311 (2021). https://doi.org/10.1007/s11692-021-09539-9
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11692-021-09539-9