Afrixalus knysnae

Afrixalus knysnae (Loveridge, 1954)

Original Published Description:

Loveridge, A. (1954).  New frogs of the genera Hyperolius and Arthroleptis from South Africa. Annals of the Natal Museum. 13, 95-99.

Common Names

Knysna Banana Frog (English), Knysna Spiny Reed Frog (English), Knysna Spiny Leaf-folding Frog (English)

Languages: English

Overview

Distribution

A. knysnae is endemic to the Western Cape Province of South Africa (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).

Author(s): Burger M.,
Rights holder(s): Burger M.,

Etymology

This species is named for the type locality: Knysna, [Western] Cape Province, South Africa.

Author(s): Zimkus, Breda
Rights holder(s): Zimkus, Breda

Description

Size

This species ranges from 22–25.2 mm in length (Minter et al., 2004).

Author(s): Burger, M.
Rights holder(s): Burger, M.

Morphology

The presence of a vertical pupil and minute asperities (spines), distributed uniformly over the dorsal, and posterior ventral skin of the body, and the dorsal skin of the limbs. In A. knysnae the snout is not noticeably swollen or bulbous nor is there a concentration of tubercular asperities in this region, as is the case in most male A. s. spinifrons. The gular disc is smaller and transversely oval to round in A. knysnae whereas, in both subspecies of A. spinifrons, the disc covers most of the gular surface (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).

Author(s): Burger M.; Pickersgill M.; Braack H.H.; Minter, L.R.
Rights holder(s): Burger M.; Pickersgill M.; Braack H.H.; Minter, L.R.

Comparisons

Pickersgill (1996) found that  A. knysnae is morphologically similar, and sympatric, to Hyperolius marmoratus and H. horstockii. However A. knysnae has asperities present which make it easier to distinguish from the other two (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).

Author(s): Burger, M.; M. Pickersgill; Braack H.H.; Minter, L.R.
Rights holder(s): Burger, M.; M. Pickersgill; Braack H.H.; Minter, L.R.

Ecology

Habitat and Ecology

Branch and Hanekom (1987) noted that A. knysnae inhabits a coastal mosaic of Mountain Fynbos and Afromontane Forest (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).

Author(s): Burger, M.; Pickersgill, M.; Braack H.H.; Minter, L.R.
Rights holder(s): Burger, M.; Pickersgill, M.; Braack H.H.; Minter, L.R.

Life History

Reproduction

Breeding has not been well researched. The breeding season is suggested to be between October to November. However, juveniles have been collected in early October, for these breeding would have taken place in September. As well breeding activity has been recorded in February (Text modified from Minter et al., 2004, © SI/MAB Biodiversity Program).

Author(s): Burger, M.; Pickersgill, M; Braack H.H.; Minter, L.R.
Rights holder(s): Burger, M.; Pickersgill, M; Braack H.H.; Minter, L.R.

Advertisement Call

These calls consisted of two parts: a short “zip” and a longer “trill” (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).

Author(s): Burger M.; Pickersgill M.; Braack H.H.; Minter, L.R.
Rights holder(s): Burger M.; Pickersgill M.; Braack H.H.; Minter, L.R.

Conservation

IUCN Red List Category and Justification of Conservation Status

A. knysnae is considered Endangered due to a severely fragmented range, and a perceived continuing decline in the area of occupancy, numbers of individuals and locations, as well as a decrease in the area and quality of its habitat (Text from Minter et al., 2004, © SI/MAB Biodiversity Program).

Author(s): Burger, M.; Pickersgill, M; Braack H.H.; Minter, L.R.
Rights holder(s): Burger, M.; Pickersgill, M; Braack H.H.; Minter, L.R.

Taxonomy

  • Hyperolius knysnae Loveridge, 1954 (synonym)
  • Afrixalus brachycnemis knysnae — Poynton, 1964 (synonym)
  • Afrixalus knysnae — Pickersgill, 1984 (synonym)

References

[Anonymous] (2004).  Atlas and Red Data Book of the Frogs of South Africa, Lesotho and Swaziland. (MinterL., BurgerM., HarrisonJ., BraackH H., BishopP J., KloepferD., Ed.).SI/MAB Series. 9, Washington, D.C.: Smithsonian Institution.
Branch, W. R., & Hanekom N. (1987).  The herpetofauna of the Tsitsikamma Coastal and Forest National Parks. Koedoe. 49-60.
Fitzsimons, V. (1946).  An account of the reptiles and amphibians collected on an expedition to the Cape Province, October to December, 1940. Annals of the Transvaal Museum. 20, 351-377.
Loveridge, A. (1954).  New frogs of the genera Hyperolius and Arthroleptis from South Africa. Annals of the Natal Museum. 13, 95-99.
Pickersgill, M. (1996).  A new subspecies of Afrixalus (Anuna, Hyperoliidae) from KwaZulu-Natal, South Africa, with comments on its superspecies affinities. Durban Museum Novitates. 49-59.