Scinax aromothyella Faivovich 2005

Known from some localities in the province of Misiones, Argentina and Uruguay (Departments of Cerro Largo, Maldonado and Treinta y Tres). Probably its distribution extend to the state of Rio Grande do Sul, Brazil.

Herbácea

Helenii folium et rhizoma,inulina, óleo essencial, princípios amargos(helenina) (11)

Sementes

Description of the holotype Adult male; body moderately robust, head nearly triangular in dorsal view, protruding in profile; head longer than wide, 32% of snout-vent length. Nostrils slightly protruded, located laterally; distance between nostrils 43% of interorbital distance. Tubercle between nostrils absent. Canthus rostralis rounded. Loreal region concave, forming abrupt slope toward lip. Eye large, eye diameter 52% of interorbital distance, almost equal to eye-nostril distance. Tympanum rounded, separated from eye by distance almost equal to tympanum diameter. Tympanum diameter 25% larger than width of disc of Finger III. Supratympanic fold poorly developed. Some scattered, flat, barely distinguishable rounded tubercles above tympanum and on eyelid. Vocal sac subgular, slightly lateralized, externally expanded. Tongue oval, free laterally and posteriorly, shallowly notched posteriorly. Vomerine teeth in two series between choanae, though slightly displaced posteriorly. Choanae elliptical. Vocal slits present, longitudinal. Arm slender, forearm robust. Axillary membrane absent. Ulnar tubercles absent. Fingers slender; subarticular tubercles single, conical on Fingers I and II; rounded on Fingers III and IV. Palmar tubercle somewhat flat, distally bifid; thenar tubercle elliptical. discs elliptical, wider than long; disc on Finger I noticeably smaller than others. Webbing absent between Fingers III and IV, extremely reduced between Finger I and II, and II and III. Thick, unpigmented nuptial pad covering base of thumb dorsomedially, extending medially up to outer margin of the palmar tubercle, and distally up base of first phalanx. Hind limbs slender; TL 51% of snout-vent length. A rounded, low tubercle present on heel. Toes slender; subarticular tubercles conical, those on Toe IV slightly rounded. Outer metatarsal tubercle conical, small; inner metatarsal tubercle subcircular, nearly twice as large as outer tubercle. Discs subelliptical, wider than long. Foot webbed. Tarsal fold absent. Three flat, almost indistinguishable tubercles along tarsus. Thin, irregular patch of glandular tissue present in inguinal region. Pectoral fold absent. Anal opening at upper level of thighs. Skin on throat and dorsum smooth, granular on belly and undersurfaces of thigh. Color in preservative: Dorsum light brown, with an inverted dark brown trapezoid-shaped interocular mark, posterior margin notched; two irregular longitudinal wide stripes on each side, one extending dorsolaterally from behind eye to beyond sacral region; the other, less defined, extends from posterolateral margin of eye ventrally, becoming diffuse before level of sacrum. Three dark brown diagonal bars with diffuse margins cover dorsal surface of shank, continuous to somewhat irregular, vertical bars on thigh; where marks extend to hidden surfaces and are separated by unpigmented areas. Poorly defined, irregular dark brown blotches occur on dorsal part of foot, toes, distal margin of thigh, forearm, arm, and Fingers. Venter creamy white, melanophores irregularly spaced over all ventral surfaces, including limbs, throat, belly. Inguinal region and proximal, hidden surface of thigh completely unpigmented. Measurements of holotype (in mm): snout-vent length 24.5; head length 7.9; head width 7.4; internarial distance 1.9; eye diameter 2.4; eye.nostril distance 2.3; tympanum diameter 1.2; tibia length 12.5; foot length 10.5. Variation among paratypes In preservative, the dorsum is lighter brown in some specimens. The width and shape of the dorsal longitudinal stripes are variable; the stripe is continuous in 21 of the 30 paratypes and discontinuous on 12 specimens. This stripe has regular margins on 16 specimens; in 8 specimens these stripes get wider at a portion posterior to the scapular region, while in four specimens, they get wider at the sacral region; in three specimens, they are expanded on both regions. In three specimens the stripes are diffuse, barely distinct. In most specimens the lateral stripe that runs from the posterolateral margin of the eye is less defined than the dorsal one; in eight of them, it diffuses just posterior to the arm, before bending posteroventrally. Twenty-five paratypes have an interocular trapezoid-shaped mark similar to the holotype, while the other four have a straight posterior margin on the trapezoid mark. In nine specimens, the vertical bars on the thigh are barely distinct, while in others the bars on the anterior and/or posterior surface of the thigh become irregular, forming an almost reticulate pattern that delimits unpigmented areas (more common on the anterior surface of the thigh) or that coalesces into a large, densely pigmented area (only on the posterior hidden surface of the thigh). In two specimens, there are two instead of three diagonal bars marks on the shank. The ventral pattern ranges from tiny dark spots regularly scattered on the belly, throat, and undersides of limbs to a brown vermiculation on the belly, formed by aggregations of those same spots. On some specimens the spots become even denser on the undersides of the hind limbs. In terms of morphology, most variation involves the development and presence or absence of tubercles. Some paratypes differ from the holotype by having a few rounded supernumerary tubercles on the sole (mostly at the base and along metatarsals of Toes III, IV, and V) or the palm. The apparent absence of these tubercles in many specimens, including the holotype, is likely a preservation artifact. The degree of sloping of the loreal region toward the lip may be more abrupt in some specimens than in others. The thin patch of glandular tissue in the inguinal region is visible in most specimens; however, it is not visible in a few specimens that lost pigmentation due to fixation. It is not clear if this is due to a fixation artifact or if the glandular tissue was never there. The nuptial pad is present in all males, but the extent of thumb involved varies; in a few specimens some of the glands that make up the nuptial pad are also scattered along the medial margin of Finger II. The two females are larger than males. Their forearms are not robust as in males, and no trace of glandular tissue is present in the inguinal region. The loreal region forms a gradual slope towards the lip in both females. Measurements of the paratypes (in mm) range (mean ± standard error,): Males (n = 28): snout-vent length 20.2-24.8 (22.7±0.20); head length 6.8-8.3 (7.6±0.07); head width 7.2±0.07 (6.3-7.8); internarial distance 1.6-2.2 (1.9±0.03); eye diameter 1.9-2.5 (2.3±0.03); eye-nostril [-]

Europa

DD. Data Deficient.

Scinax aromothyella és una espècie de granota que es troba a l'Argentina i, possiblement també, al Brasil.

Scinax aromothyella là một loài ếch trong họ Nhái bén. Loài này có ở Argentina, Uruguay và có thể cả Brasil. Các môi trường sống tự nhiên của chúng là các khu rừng ẩm ướt đất thấp nhiệt đới hoặc cận nhiệt đới, đồng cỏ nhiệt đới hoặc cận nhiệt đới vùng ngập nước hoặc lụt theo mùa, sông, đầm nước ngọt, và đầm nước ngọt có nước theo mùa.