| Description: |
Austrolebias ayoreode, new species urn:lsid:zoobank.org:act: 292472BD-D4D6-4081-B92F-F535584DF1F1 (Figs. 5–7; Tab. 2) Holotype. MNKP 16612, male, 50.7 mm SL, Bolivia, Santa Cruz, Charagua Iyambae Guarani Autonomous Territory, Ñembi Guasu Conservation and Ecological Importance Area, temporary pool within low dry forest (Abayoy) on side of dirt road between San Jorge and Ponderosa ranches ca. 10 km west of San Jorge, hydrologic unit 6424726 (Pfafstetter), San Miguel watershed, upper Paraguay River drainage, La Plata basin, 19°08’46”S 59°55’44”W, 10 Jun 2021, C. Ergueta & H. A. Drawert. Paratypes. MNKP 16587, 12 males (21.2–34.7 mm SL), 11 females (19.7–38.1 mm SL), collected with holotype. MNKP 16590, 2 males (34.7–34.8 mm SL), 1 female (26.1 mm SL), c&s, collected with holotype. Non-types. MNKP 16589, female, Bolivia, Santa Cruz, Charagua Iyambae Guarani Autonomous Territory, Ñembi Guasu Conservation and Ecological Importance Area, temporary pool within low dry forest (Abayoy) ca. 1 km southwest of Ponderosa ranch, hydrologic unit 6424726 (Pfafstetter), San Miguel watershed, upper Paraguay River drainage, La Plata basin, 19°10’35”S 59°57’24”W, 10 Jun 2021, C. Ergueta. Diagnosis. Austrolebias ayoreode males differs from all congeners, except A. accorsii, A. ephemerus, and A. vandenbergi, by presence of 1–3 transverse rows of scales on basal anterior and median portion of anal fin. Males of A. ayoreode can be distinguished from A. accorsii, A. ephemerus, A. melanoorus, A. queguay, and A. vandenbergi by presence of whitish to pale yellowish dots on flanks usually vertically aligned in unarranged rows (vs. absent in A. accorsii; mostly coalesced in vertical bars in A. ephemerus, A. melanoorus, and A. queguay; absent or, when rarely present, sparse and scattered in A. vandenbergi); from A. accorsii and A. vandenbergi by urogenital papilla mostly attached to anal fin (70–80% adhered vs. only on base and maximum 10% adhered), medial pelvic fin membranes 75–100% coalesced (vs. less than 75% coalesced), and less ... |