Abstract
A new genus and species of Caribbean forest lizard of the subfamily Celestinae Schools & Hedges are described. This new taxon is known only from two small adjacent keys in the Laguna de Oviedo of the Parque Nacional Jaragua in the Barahona Peninsula, Dominican Republic, at the southernmost region of the Caribbean island of Hispaniola. The genus Guarocuyus gen. nov. is genetically more closely related to the clade containing Celestus Gray, Comptus Schools & Hedges, and Panolopus Cope; nevertheless, we compare it to all celestine genera. Morphologically, it differs from other celestines by having an interdigital web on three toes and by having the widest ear opening. Additionally, the species Guarocuyus jaraguanus sp. nov. has some ecological attributes that when combined, appear to be unique, including nocturnal habits, a semiprehensile tail, and a facultatively arboreal lifestyle. We note sexual dimorphism in the new species and in two other celestines, Caribicus darlingtoni (Cochran) and the poorly known Celestus macrotus Thomas & Hedges, and report a range extension of the latter species into the Dominican Republic. We also discuss several scale topography conditions considered of taxonomic value for the group.
References
Altman, I. (2007) The Revolt of Enriquillo and the Historiography of Early Spanish America. The Americas, 63 (4), 587–614. https://doi.org/10.1353/tam.2007.0052
Ariano-Sánchez, D. & Melendez, L. (2009) Arboreal Alligator Lizards in the Genus Abronia: Emeralds from the Cloud Forests of Guatemala. IRCF Reptiles & Amphibians, 16 (1), 24–27.
Cochran, D.M. (1939) Diagnoses of three new lizards and a frog from the Dominican Republic. Proceedings of the New England Zoological Club, 18, 1–3.
Etheridge, R. (1967) Lizard Caudal Vertebrae. Copeia, 1967 (4), 699–721. https://doi.org/10.2307/1441880
Hardy, J.D. (1958) Tail prehension and related behavior in a New World lizard. Herpetologica, 14, 205–206.
Hedges, S.B. (2022) Caribherp: West Indian amphibians and reptiles. Temple University, Philadelphia, Pennsylvania. Available from: http://www.caribherp.org (accessed 7 January 2022)
Hedges, S.B. & Conn, C.E. (2012) A new skink fauna from Caribbean islands (Squamata, Mabuyidae, Mabuyinae). Zootaxa, 3288 (1), 1–244. https://doi.org/10.11646/zootaxa.3288.1.1
Hedges, S.B. & Thomas, R. (2001) At the lower size limit in amniote vertebrates: a new diminutive lizard from the West Indies. Caribbean Journal of Science, 37, 168–173.
Hedges, S.B. & Vidal, N. (2009) Lizards, snakes, and amphisbaenians (Squamata). In: Hedges, S.B. & Kumar, S. (Eds.), The timetree of life. Oxford University Press, New York, Nw York, pp. 383–389.
Hedges, S.B., Powell, R., Henderson, R.W., Hanson, S. & Murphy, J.C. (2019) Definition of the Caribbean Islands biogeographic region, with checklist and recommendations for standardized common names of amphibians and reptiles. Caribbean Herpetology, 67, 1–53. https://doi.org/10.31611/ch.67
Henderson, R.W. & Powell, R. (2009) Natural history of West Indian amphibians and reptiles. University Press of Florida, Gainesville, Florida, 495 pp.
Higham, E.T. (2019) Lizard locomotion: relationships between behavior, performance, and function. In: Bels, V.L. & Russell, A.P. (Eds.), Behavior of Lizards: Evolutionary and Mechanistic Perspectives. CRC Press, Boca Raton, Florida, pp. 47–86.
Inchaústegui, S.J., Schwartz, A. & Henderson, R.W. (1985) Hispaniolan giant Diploglossus (Sauria: Anguidae): Description of a new species and notes on the ecology of D. warreni. Amphibia-Reptilia, 6, 195–201. https://doi.org/10.1163/156853885X00092
IUCN (2022) IUCN Redlist of Threatened Species. Available from: http://www.iucnredlist.org/ Gland, Switzerland: International Union for the Conservation of Nature (accessed 20 February 2022)
Lamar, W.W., Barrio-Amoros, C.L., Dwyer, Q., Abarca, J.G. & de Plecker, R. (2015) The gerrhonotine genus Coloptychon (Sauria: Anguidae). Mesoamerican Herpetology, 2, 88–104.
Landestoy T., M.A., Reynolds, R.G. & Henderson, R.W. (2021) A small new arboreal species of West Indian boa (Boidae; Chilabothrus) from southern Hispaniola. Breviora, 571, 1–20. https://doi.org/10.3099/MCZ67.1.
Landestoy T., M.A., Turner, D.B., Marion, A.B. & Hedges, S.B. (2018) A new species of Caribbean toad (Bufonidae, Peltophryne) from southern Hispaniola. Zootaxa, 4403 (3), 523–539. https://doi.org/10.11646/zootaxa.4403.3.6
Ozuna, A. (2018) Rebellion and Anti-colonial Struggle in Hispaniola: From Indigenous Agitators to African Rebels. Africology: The Journal of Pan African Studies, 11, 77–96.
Powell, R. (1999) Herpetology of Navassa Island, West Indies. Caribbean Journal of Science, 35, 1–13.
Powell, R., Henderson, R.W. Adler, K. & Dundee, H.A. (1996) An annotated checklist of West Indian amphibians and reptiles. In: Powell, R. & Henderson, R.W. (Eds.), Contributions to West Indian Herpetology: A Tribute to Albert Schwartz. Contributions to Herpetology. Vol. 12. Society for the Study of Amphibians and Reptiles, Ithaca, New York, pp. 51–93.
Ronquist, F., Teslenko, M., van der Mark, P., Ayres, D.L., Darling, A., Höhna, S., Larget, B., Liu, L., Suchard, M.A. & Huelsenbeck, J.P. (2012) MRBAYES 3.2: Efficient Bayesian phylogenetic inference and model selection across a large model space. Systematic Biology, 61, 539–542. https://doi.org/10.1093/sysbio/sys029
Schools, M. & Hedges, S.B. (2021) Phylogenetics, classification, and biogeography of the Neotropical forest lizards (Squamata, Diploglossidae). Zootaxa, 4974 (2), 201–257. https://doi.org/10.11646/zootaxa.4974.2.1
Schools, M., Kasprowicz, A. & Hedges, S. B. (2022) Phylogenomic data resolve the historical biogeography and ecomorphs of Neotropical forest lizards (Squamata, Diploglossidae). Molecular Phylogenetics and Evolution, 175, 1–14. https://doi.org/10.1016/j.ympev.2022.107577
Schwartz, A. (1964) Diploglossus costatus Cope (Sauria, Anguidae) and its relatives in Hispaniola. Reading Public Museum and Art Gallery, 13, 1–57.
Schwartz, A. (1965) Two new subspecies of the anguid lizard Wetmorena from Hispaniola. Proceedings of the Biological Society of Washington, 78, 39–48.
Schwartz, A. (1970) A new species of large Diploglossus (Sauria: Anguidae) from Hispaniola. Proceedings of the Biological Society of Washington, 82, 777–788.
Schwartz, A. (1971) A new species of bromeliad-inhabiting galliwasp (Sauria: Anguidae) from Jamaica. Breviora, 371, 1–10.
Schwartz, A. (1980) The herpetogeography of Hispaniola, West Indies. Studies of the Fauna of Curacao and Other Caribbean Islands, 61, 86–127.
Schwartz, A., Graham, E.D. Jr. & Duval, J.J. (1979) A new species of Diploglossus (Sauria: Anguidae) from Hispaniola. Proceedings of the Biological Society of Washington, 92, 1–9. https://doi.org/10.31390/opmns.040
Schwartz, A. & Henderson, R.W. (1991) Amphibians and reptiles of the West Indies: descriptions, distributions, and natural history. University of Florida Press, Gainesville, Florida, 720 pp.
Schwartz, A. & Incháustegui, S.I. (1976) A new species of Diploglossus (Reptilia, Lacertilia, Anguidae) from Hispaniola. Journal of Herpetology, 10, 241–246. https://doi.org/10.2307/1562985
Thomas, R. (1966) A reassessment of the herpetofauna of Navassa Island. Journal of the Ohio Herpetological Society, 5 (3), 73–89. https://doi.org/10.2307/1562610
Thomas, R. (1971) A new species of Diploglossus (Sauria: Anguidae) from Hispaniola. Occasional papers of the Museum of Zoology Louisiana State University, 40, 1–9.
Thomas, R. & Hedges, S.B. (1989) A new Celestus (Sauria: Anguidae) from the Chaine de la Selle of Haiti. Copeia, 1989 (4), 886–891. https://doi.org/10.2307/1445973