Hyperolius concolor (Hallowell, 1844)

Segniagbeto, Gabriel Hoinsoudé, Ohler, Annemarie, Rödel, Mark-Oliver, Luiselli, Luca & Dubois, Alain, 2024, Amphibians of Togo: taxonomy, distribution and conservation status, Zoosystema 46 (25), pp. 631-670 : 644

Hyperolius concolor (Hallowell, 1844)

( Fig. 6A, B )

MATERIAL EXAMINED. — Togo • 2 ♂; Akloa ; MNHN-RA-2008.0101, MNHN-RA-2008.0102 • 4 ♂, 2 ♀; Badou ; MNHN-RA-1993.6126-6131 • 1 ♂; Missahohé ; ZMB 36090 • 3 ♂; Yégué; Coll . GHS-W 0696, Coll . GHS-W 0699, Coll . GHSW 0993 • 3 ♂; Adjarala; Coll . GHS-W 1836, Coll . GHS-W 1837, Coll . GHS-W 1840 • 2 ♂; Yikpa-Dzigbe; Coll . GHS-W 1971, GHS-W 1972 • 3 ♂; MNHN-RA-1994.4496-4498 • 3 ♂; Tchamba ; ZMB 77901 -77903 • 3 ♀; Lomé ; MNHN-RA-1993.6088-6091 .

DESCRIPTION. — Slender to compact-bodied frog (SVL 24.8- 32.5 mm ♂, 28.5-37.1 mm ♀), more robust than previous species. Snout rounded or oval. Head slightly longer than broad (HW 28- 34% SVL; HL 31-39% SVL). Tympanum distinct, very small (TYD 2-5% SVL). Tibia moderately long (TL 46-49% SVL). Webbing large; webbing formula: I 1 – 1 ½ II ½ – 1 ½ III 1 – 1 IV 1 – ½ V. Fingers and toes terminated by disks. Skin uniformly smooth in the dorsal parts; smooth flanks; belly and chest granular.

COLOURATION. — The dorsum is uniformly yellow or yellowish in life in males (with darker dorsal pattern) and green in females during the day. At night both sexes are yellow. Colour turns gray in alcohol. The ventral side is white.

SEXUAL DIMORPHISM. — Sexes differ in colour and males have a yellow gland on the subgular vocal sac. Females are larger than males.

HABITATS AND DISTRIBUTION. — This species is distributed in all ecological zones of the country. Field observations and museum vouchers indicate a higher frequency in the forest area (Badou region up to the boundary of Fazao). It is characteristic of savannahs associated with forest areas near water points (ponds or rivers). A few specimens were collected in gallery forests along the Yégué River in Adélé and along the gallery forest that leads to the Akloa waterfall in Badou. This species was reported in Togo by Ahl (1931) under the junior subjective synonyms Hyperolius depressus Ahl, 1931 , Hyperolius togoensis Ahl, 1931 , Hyperolius moseri Ahl, 1931 and Hyperolius narinus Ahl, 1931 (see Bourgat 1979; Segniagbeto et al. 2007, 2022; Tillack et al. 2021).

Figures

FIG. 6. — Representatives of anuran species from Togo in life: A, B, Hyperolius concolor (Hallowell, 1844) males (Kalaré); C, Hyperolius fusciventris burtoni (Boulenger, 1883) female (Togblekope); D, Hyperolius igbettensis Schiøtz, 1963 (Kpeisolongo).