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Description

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A small (26–31 mm) frog from the dense forests in Cameroun. Colour bright green, dorsum with small white asperities. Hidden parts of limbs turquoise green. Males with a large gular flap and a reduced gular sac. Ventrum translucent so that the inner organs are visible.Voice. – Apparently not gregarious during breeding. The males sit far from each other as do Leptopelis. The voice is a metallic “toc”, repeated 5–6 times.This account was taken from "Treefrogs of Africa" by Arne Schiøtz with kind permission from Edition Chimaira (http://www.chimaira.de/) publishers, Frankfurt am Main.
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Distribution and Habitat

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A forest form from Cameroun, associated with running water.
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Life History, Abundance, Activity, and Special Behaviors

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Development. – The eggs, 40–50 in an egg mass with transparent jelly, are deposited about 1.5 metres above water near small streams. Apparently the female guards the eggs and assists the larvae in breaking free of the jelly. The jelly does not seem to disintegrate as in Hyperolius, and the tadpoles orientate themselves in it with the head up. A batch in captivity spent 3 weeks in the jelly apparently living on their yolk. The next stage is spent in water, where the tadpoles are plant-eaters. They have a tooth formula of 1,1+1/3 which is different from that of Hyperolius. The largest tadpoles are 29 mm.
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Hyperolius obstetricans

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Hyperolius obstetricans, or frilled egg-guarding frog, is a species of frog in the family Hyperoliidae.[2][3] It is known from southern and south-western Cameroon, Equatorial Guinea, Gabon,[1][2][3] and northern Angola;[2][3] it is likely to occur in the intervening Republic of the Congo and Democratic Republic of the Congo.[2]

Description

Hyperolius obstetricans grow to 31 mm (1.2 in) in snout–vent length. The body is slender while the head is broad with a rounded snout. The eyes are large. The tympanum is distinct. The finger and toe tips are enlarged into large, rounded discs; the fingers have medium webbing while the toes have almost complete webbing. Dorsal skin is granular. The dorsum is blueish green-grey, grass- or olive-green to brownish green with many minute white dots and possibly with some darker markings on the head and shoulders; the region from the eyelids to the nostrils is brownish. Skin is ventrally finely granular. The anterior part of the throat is white while the posterior part is dark blue in males and turqoise in females. The belly is translucent turquoise to black, with the inner organs visible through the skin.[4]

The male advertisement call is a slow, metallic "tuc" that is repeated 5–6 times.[4][5]

Habitat and conservation

Hyperolius obstetricans occurs in forests at elevations below 800 m (2,600 ft) in association with narrow streams under continuous canopy. Its favoured streams have well-aerated, flowing, but not torrential water. The eggs are laid in small clumps on leaves above streams, into which the tadpoles fall and develop further. It is a common but patchily distributed species that is often absent from apparently suitable habitat. It is probably threatened by loss of closed-canopy forests. It is present in the Moukalaba-Doudou National Park (Gabon) and probably in some other protected areas too.[1]

References

  1. ^ a b c IUCN SSC Amphibian Specialist Group (2013). "Alexteroon obstetricans". IUCN Red List of Threatened Species. 2013: e.T56089A18371179. doi:10.2305/IUCN.UK.2013-2.RLTS.T56089A18371179.en. Retrieved 16 November 2021.
  2. ^ a b c d e Frost, Darrel R. (2022). "Hyperolius obstetricans (Ahl, 1931)". Amphibian Species of the World: an Online Reference. Version 6.1. American Museum of Natural History. doi:10.5531/db.vz.0001. Retrieved 12 January 2022.
  3. ^ a b c Ernst, Raffael; Kehlmaier, Christian; Baptista, Ninda L.; Pinto, Pedro Vaz; Branquima, Makaya Futuro; Dewynter, Maël; Fouquet, Antoine; Ohler, Annemarie & Schmitz, Andreas (2021). "Filling the gaps: The mitogenomes of Afrotropical egg-guarding frogs based on historical type material and a re-assessment of the nomenclatural status of Alexteroon Perret, 1988 (Hyperoliidae)". Zoologischer Anzeiger. 293: 215–224. doi:10.1016/j.jcz.2021.06.002.
  4. ^ a b Channing, Allan & Rödel, Mark-Oliver (2019). Field Guide to the Frogs & other Amphibians of Africa. Cape Town: Struik Nature. pp. 168–169. ISBN 978-1-77584-512-6.
  5. ^ "Alexteroon obstetricans". AmphibiaWeb. University of California, Berkeley. 2022. Retrieved 12 January 2022.
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Hyperolius obstetricans: Brief Summary

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Hyperolius obstetricans, or frilled egg-guarding frog, is a species of frog in the family Hyperoliidae. It is known from southern and south-western Cameroon, Equatorial Guinea, Gabon, and northern Angola; it is likely to occur in the intervening Republic of the Congo and Democratic Republic of the Congo.

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