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| Adenomera guarani Zaracho, Lavilla, Carvalho, Motte & Basso, 2023 |
ABSTRACT
Adenomera is a genus of Neotropical leaf-litter frogs widely distributed in South America and regarded taxonomic-wise challenging. One of these is the open-habitat Adenomera diptyx from Paraguay, which may correspond to a species complex. An integrative analysis of morphological variation, in combination with acoustic and molecular data of several populations from Argentina, Paraguay, and Brazil resulted in the recharacterization of nominal A. diptyx and the description of a new, closely related species. Adenomera diptyx is recognized by its advertisement call given at a high repetition rate (176–299 per minute), and the dorsal color pattern consisting of a light mid-dorsal line and a dark brown interorbital bar with irregular black edges. In comparison with A. diptyx, the new species, Adenomera guarani sp. nov., produces its advertisement call at a lower repetition rate (73–147 per minute), and the dorsal color pattern consists of a light, broad, mid-dorsal stripe and a mask-like patch in the interorbital region. The redefinition of A. diptyx will contribute to future studies focusing on the taxonomic status of other genetic lineages tentatively assigned to this species complex, which could represent additional unnamed species in the open-habitat Adenomera clade.
Keywords: Argentina, Chacoan region, cryptic species, integrative taxonomy, Paraguay
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| Adenomera guarani sp. nov., holotype, ♂ (UNNEC 9074), Corrientes, Argentina, SVL: 21.6 mm. Coloration in life. |
Adenomera guarani sp. nov.
Diagnosis: Adenomera guarani sp. nov. is recognized within Adenomera by the following combination of character states: (1) body robust, (2) medium size (adult male SVL = 20.1–26.4 mm); (3) light-colored, broad mid-dorsal stripe with diffuse borders, extending from above the vent to the scapular region; (4) a dark mask-like pattern formed by an inverted triangle in the interorbital region; (5) toe tips unexpanded with tapered point; (6) antebrachial tubercle absent; (7) exotrophic larvae; (8) labial tooth row formula (LTRF): 2(2)/3(1); (9) single-note advertisement call; (10) call notes formed by incomplete pulses; (11) relatively high note repetition rate (73–147 per minute); and (12) low pulse number (4–9 per note).
Etymology: The specific name guarani, used as a noun in apposition and refers to the Guaraní, a native indigenous group that inhabited in the past a vast region in South America, including areas where the new species occurs. Currently, a few indigenous communities still live in wild areas. However, the Guaraní language (Avañe′ẽ), is usually spoken by people in Paraguay and other neighboring countries and also utilized to name innumerous geographical features (e.g., rivers, wetlands, hills), animals, plants, towns, and cities.
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| Adenomera guarani sp. nov. Dorsal color patterns. A–C. UNNEC 9075 (♂), 9551 (paratype, ♀), 9003 (paratype, ♂) (Paso de la Patria, Corrientes). D–O. LGE 25740 (paratype, ♂), UNNEC 9704 (♂), 8366 and 8365 (paratypes, ♀), 8505 (♂), 8293 (♂), 8354 (♂), 11965 to 11969 (♂), (Corrientes city, Corrientes). |
Víctor H. Zaracho, Esteban O. Lavilla, Thiago R. Carvalho, Martha Motte and Néstor G. Basso. 2023. Redescription of Adenomera diptyx (Boettger, 1885) (Anura, Leptodactylidae) and Description of A closely related New Species. European Journal of Taxonomy. 888(1), 1–45. DOI: 10.5852/ejt.2023.888.2205
