A small, long, very slender, sharp-nosed savanna-living Hyperolius (19-24 mm). Dorsum translucent green, uniform or with diffuse darker spots. A light yellow dorsolateral and canthal stripe normally present in males, sometimes in females. Sometimes a fine middorsal line of chromatophores is present. Ventrum white; limbs, feet and discs green, or discs sometimes reddish. Pupil horizontal. The males are of the same size as the females which is unusual among Hyperolius. In some populations the females lack the light dorsolateral stripe, while it is present in others.
The tadpole attains a size of 33 mm (10+23) and has a tooth formula of 1/3.
This species is called Hyperolius acuticeps (Channing et al. 2002) or Hyperolius igbettensis in some recent literature. Due to nomenclatorial uncertainty, the well established name H. nasutus is used here (Schiøtz 2006).
Several subspecies have been described, but our understanding of the variation within this species is not sufficient to establish such subspecies. Furthermore the complex may contain several cryptic species. Thus in southern Africa, the very similar H. benguellensis has recently been recognized as a separate species.
Channing has stated that the South African populations differ, e.g. in voice, from more northern populations of H. nasustus and should be recognised as H. poweri Loveridge 1938.
There is a form in south-western Cameroun southwards at least as far as R. Congo, probably to Kinshasa in R. D. Congo, which is probably a distinct species. It is similar to H. nasutus but differs in morphology, having a briefer snout and a broader body, and has a somewhat different voice and habitat preference (bushland and humid savanna). This species is being studied by Amiet, and has been recorded as Hyperolius sp. aff. nasutus by Largen and Dowsett-Lemaire (1991) from R. Congo.
This account was taken from "Treefrogs of Africa" by Arne Schiøtz with kind permission from Edition Chimaira publishers, Frankfurt am Main.
The specific name is from the Latin 'nasutus' meaning long-nosed.
Hyperolius nasutus is considered a ‘superspecies,’ a complex of multiple species that are morphologically similar, but vary in their advertisement calls and occur throughout much of sub-Saharan Africa. Included in debates over this complex are H. acuticeps, H. adspersus, H. benguellensis, H. lamottei, H. nasutus, H. poweri, H. quinquevittatus, and H. viridis. More work is necessary to determine the limits of species boundaries within this complex (Harper et al., 2010). See Channing et al. (2002), Schiøtz (2006), and Pickersgill (2007) for further discussion.
Distribution and Habitat
A common and widespread element in the savanna fauna, most noticeably in the more humid, dense savanna, from central West Africa (central Côte dIvoire) to East Africa and further south, and into the savanna of R. D. Congo and Angola. Due to confusion with H. benguellensis, H. poweri and H. sp., names which may or may not cover valid species and which may replace H. nasutus or may exist sympatric with it, an exact distribution cannot be given.
The following is the original description by Günther (1865):
Snout much produced, acutely pointed. with the canthus rostralis angular, and the loreal region flat; diameter of the eye more than half as long as the snout; tympanum hidden; tongue deeply notched;
limbs slender; fingers slightly, toes half webbed. Upper parts smooth; belly faintly granulated. Reddish white, with more or less numerous brown dots on the head and back.
Length of body: 11.5 lines
Length of hind limb: 17.5 lines
Distance between vent and heel: 11.5 lines
Length of fore limb: 8 lines
Males and females are 19–26 mm in snout-vent length (Harper et al., 2010).
This is a small, slender, translucent green frog with a sharp snout. There is a pair of light dorsolateral stripes that begin at the snout and continue over the eyes to the base of the legs. The tympanum is small and may be difficult to see. The throat of males is yellow. The ventral surface is white. Webbing is variable, but there is a small amount of webbing on the fingers. The toes are not extensively webbed (Text from Harper et al., 2010).
Southern Africa Bushveld
Garman's toad (Amietophrynus garmani) is found in the Southern African bushveld, among other ecoregions. The Southern Africa bushveld is an element of the vast savannas that cover much of southern Africa. There is low endemism in this ecoregion for both flora or fauna, but the charismatic large mammals and rich birdlife characteristic of African savannas are in evidence. The rugged Waterberg Mountains contain the highest levels of species richness and endemism in the region, and are noted for their reptilian endemism. The ecoregion occurs on an extensive, undulating interior plateau, which lies at an elevation between 700 metres (m) to 1100 m. The soils of this plateau are chiefly coarse, sandy and shallow, overlying granite, quartzite, sandstone or shale. The most distinctive topographical feature of the ecoregion is the rugged and rocky Waterberg Mountains, which rise up from the plateau to an elevation of between 1200 m to 1500 m.http://www.eoearth.org/view/article/51cbeeed7896bb431f69b38d/554565bb0cf24df5070a17ee/?topic=51cbfc79f702fc2ba8129ee0
The ecoregion amphibian associates of the Southern African bushveld are: Savanna ridged frog (Ptychadena anchietae); Angola frog (Rana angolensis); African gray treefrog (Chiromantis xerampelina); Senegal running frog (Kassina senegalensis); Striped stream frog (Strongylopus fasciatus); African clawed frog (Xenopus laevis); African split-skin toad (Schismaderma carens); Uzungwe grassland frog (Ptychadena uzungwensis); African ornate frog (Hildebrandtia ornata); Mababe river frog (Phrynobatrachus mababiensis); Marbled sand frog (Tomopterna marmorata); Marbled snout burrower (Hemisus marmoratus); Knocking sand frog (Tomopterna krugerensis), which is found broadly in southern Africa; and the Transvaal short-headed frog (Breviceps adspersus); Mozambique ridged frog (Ptychadena mossambica); Lukula grassland frog (Ptychadena taenioscelis); Horseshoe forest treefrog (Leptopelis bocagii); South African snake-necked frog (Phrynomantis bifasciatus); Boettger's dainty frog (Cacosternum boettgeri); Natal ghost frog (Heleophryne natalensis); Cryptic sandfrog (Tomopterna cryptotis); Mozambique rain frog (Breviceps mossambicus); Long reed frog (Hyperolius nasutus); Muller's clawed frog (Xenopus muelleri); Common reed frog (Hyperolius viridiflavus); Gray's stream frog (Strongylopus grayii); Natal puddle frog (Phrynobatrachus natalensis); Painted reed frog (Hyperolius marmoratus); Garman's toad (Amietophrynus garmani); Gutteral toad (Amietophrynus gutturalis); Transvaal dwarf toad (Poyntonophrynus fenoulheti); and the Flat-back toad (Amietophrynus maculatus).
Example reptilian associates within this ecoregion are: Bibron's worm snake (Typhlops bibronii); Vine snake (Thelotornis capensis); Black mamba (Dendroaspis polylepis); Angola garter snake (Elapsoidea semiannulata); Annobon lidless skink (Panaspis annobonensis); Bark snake (Hemirhagerrhis nototaenia); Bell's hingeback tortoise (Kinixys belliana); Blue throated agama (Acanthocercus atricollis); Blunt-tailed worm lizard (Dalophia pistillum); Bradfield's dwarf gecko (Lygodactylus bradfieldi); the endemic gecko Broadley's rock gecko (Afroedura broadleyi); and the endemic lizards Platysaurus minor and Platysaurus monotropis.
Some of the many mammalian taxa found within the Southern African bushveld are: Burchell's zebra (Equus quagga burchelli); Hippopotamus (Hippopotamus amphibius), a herbivore classified as Vulnerable; Cheetah (Acinonyx jubatus), a carnivore classified as Vulnerable; the Near Threatened White Rhinoceros (Ceratotherium simum); Commerson's roundleaf bat (Tomopterna cryptotis), classified as Near Threatened; Spotted hyena (Crocuta crocuta); and the Mauritian tomb bat (Taphozous mauritianus).
There are numerous avian species found in this ecoregion, a few examples being: the Near Threatened Red footed falcon (Falco vespertinus); Kori bustard (Ardeotis kori); Long-crested eagle (Lophaetus occipitalis); Olive bee eater (Merops superciliosus); Marabou stork (Leptoptilos crumeniferus); Martial eagle (Polemaetus bellicosus); and the Pink-backed pelican (Pelecanus rufescens).
Habitat and Ecology
Habitat and Ecology
This species is found in a wide range of habitat types, including savanna, shrubland, grassland, and degraded habitats, such as, agricultural and urban area at elevations up to 900 m (Text from Harper et al., 2010).
Life History and Behavior
Call is variable within the complex (Harper et al., 2010).
Breeding takes place in rivers, lakes and swamps with emergent vegetation. Eggs are laid directly in the water in clutches of around 200 eggs (Text from Harper et al., 2010).
IUCN Red List Assessment
Red List Category
Red List Criteria
- 2004Least Concern
Life History, Abundance, Activity, and Special Behaviors
The call is a high-pitched scream consisting of an initial sound and a small number of elements.
The eggs are laid submerged in water in batches of about 200. They have a white and greenish-grey pole.
Hyperolius nasutus is a species of frog in the Hyperoliidae family. Common names include long-nosed reed frog and sharp-nosed reed frog. It is found in Angola, Botswana, Republic of the Congo, Gabon, Namibia, Zambia, possibly Democratic Republic of the Congo, and possibly Zimbabwe.
Its natural habitats are dry savanna, moist savanna, subtropical or tropical dry shrubland, subtropical or tropical moist shrubland, subtropical or tropical dry lowland grassland, subtropical or tropical seasonally wet or flooded lowland grassland, subtropical or tropical high-altitude grassland, rivers, swamps, freshwater lakes, freshwater marshes, urban areas, heavily degraded former forest, water storage areas, and ponds.
- Schiøtz, A., et al. 2009. Hyperolius nasutus. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. Downloaded on 02 June 2013.
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