In life the dorsum (at least of males) is light green. In preservative the specimens are slightly gray to brownish, with many small rounded dark spots. Limbs have complete or broken dark crossbars. Ventral surfaces are cream or pale brown, depending on age and sex. Males and juveniles have cream colored ventral skin color; females have a brown throat and abdomen with indistinct brownish areas. One male specimen was found to have a single enlarged testis (6.6 mm) and to lack vocal slits, mandibular spines, and nuptial pads (Inger and Yambun 2001). . However, it is not known if this specimen represents a fully mature male; one specimen in the ZMB in Berlin is reported to have a dark nuptial pad (Inger 1966 cited in Matsui et al. 2007). Females are reported to contain numerous small, unpigmented ova (Matsui et al. 2007).
The tadpole assumed to belong to this species has a well-defined abdominal sucker immediately posterior to the oral disc. The large oral disc is only slightly narrower than the width of the body. In this species, the larval upper jaw sheath is lacking. Small papillae are present across the entire margin of the upper lip, with the lower lip having marginal papillae only. Eyes are located dorsally, and the snout is broadly rounded in dorsal view. The body widens just in front of the eyes, then tapers slightly thereafter and abruptly tapers at the end. The tail is slender, with the dorsal fin originating at the end of the proximal third of the tail. Head-body length is 10-13 mm and the body is black both dorsally and laterally (Inger and Yambun 2001; Matsui et al. 2007).
Distribution and Habitat
Malaysian region distribution from AmphibiaWeb's database: Sabah
Life History, Abundance, Activity, and Special Behaviors
Possible reasons for amphibian decline
General habitat alteration and loss
Inger, R. F. (1966). ''The systematics and zoogeography of the Amphibia of Borneo.'' Fieldiana Zoology, 52, 1-402.
Inger, R. F., Lian, T. F., and Yambun, P. (2001). ''A new species of toad of the genus Ansonia (Anura: Bufonidae) from Borneo.'' The Raffles Bulletin of Zoology, 49(1), 35-37.
Matsui, M., Yambun, P., and Sudin, A. (2007). ''Taxonomic relationshiops of Ansonia anotis Inger, Tan, and Yambun, 2001, and Pedostibes maculatus (Mocquard, 1890), with a description of a new genus (Amphibia, Bufonidae).'' Zoological Science, 24, 1159-1166.
Written by Raul E. Diaz (lissamphibia AT gmail.com), UC Berkeley
First submitted 2007-12-21
Edited by Kellie Whittaker (2009-05-29)
Species Account Citation: AmphibiaWeb 2009 Sabahphrynus maculatus <http://amphibiaweb.org/species/387> University of California, Berkeley, CA, USA. Accessed Jun 21, 2018.
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