Iberian midwife toad
|Iberian midwife toad|
The Iberian midwife toad or brown midwife toad (Alytes cisternasii, in Spanish sapo partero ibérico) is a species of frog in the family Alytidae (formerly Discoglossidae) found in Portugal and western Spain. Members of this species are typically found in open habitats such as meadows and open oak forests. Habitat loss is one of the threats to their survival.
The Iberian midwife toad grows to a length of about 40 mm (1.6 in), males being rather smaller than females. The snout is rounded and the eyes large, with vertical slit pupils. There are tiny, often orange, warts on the upper eyelids. The parotoid glands are relatively small and the tympani distinct. There are many tubercles on the body and concentrations of glandular warts under the arms, in the groin area and on the ankles. The limbs are fairly short. The colour of the upper surface is brownish-grey with dark spots, and the warts are often reddish. The underparts are unspotted and greyish-white.
Distribution and habitat
This toad is native to Portugal and western Spain at altitudes of up to 1,300 metres (4,300 ft) above sea level. Their preferred habitat is Mediterranean-type scrub, rough grazing and light oak woodland.
Mating takes place in the autumn and the eggs are laid on land. The male then gathers up the egg mass and wraps it round his legs, carrying it around until the developing embryos are ready to hatch. He can carry as many as 180 eggs resulting from four clutches laid by different females. The male deposits the hatching tadpoles in suitable water bodies where they continue their development. Metamorphosis occurs about four months later when the tadpoles measure about 70 millimetres (2.8 in) in length.
The IUCN lists this species as being "Near Threatened". The main threats these frogs face are the degradation of suitable terrestrial habitat, pollution and loss of suitable breeding pools, and the introduction of the invasive crayfish Procambarus clarkii and non-native fishes which prey on the tadpoles. They are also threatened by the infectious fungal disease chytridiomycosis.
- Beja, Pedro; Bosch, Jaime; Tejedo, Miguel; Lizana, Miguel; Martínez-Solano, Iñigo; Salvador, Alfredo; García-París, Mario; Gil, Ernesto Recuero; Arntzen, Jan Willem; Marquez, Rafael; Paniagua, Carmen Diaz (2009). "Alytes cisternasii". The IUCN Red List of Threatened Species. IUCN. 2009: e.T55266A11283060. doi:10.2305/IUCN.UK.2009.RLTS.T55266A11283060.en. Retrieved 3 January 2018.
- Frost, Darrel R. (2015). "Alytes cisternasii Boscá, 1879". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 10 September 2015.
- van der Meijden, Arie; Vredenburg, Vance; Mahoney, Meredith (2002-05-25). "Alytes cisternasii". AmphibiaWeb. Retrieved 2013-12-08.