Dischidodactylus

Mount Duida frogs[1] (Dischidodactylus), is a genus of craugastorid frogs endemic to the tepuis of southern Venezuela.[1] The scientific name is derived from the Greek dischidos, meaning divided, and dactylos, meaning finger or toe, in reference to the divided ungual flap (see below).[2]

Dischidodactylus
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Craugastoridae
Subfamily: Ceuthomantinae
Genus: Dischidodactylus
Lynch, 1979
Type species
Elosia duidensis
Rivero, 1968
Species

2 species (see text)

Taxonomy

Placement of Dischidodactylus in the subfamily Ceuthomantinae (=Pristimantinae), family Craugastoridae, is based on morphology because no DNA sequence data are available. Dischidodactylus is closely related to Ceuthomantis, with which they share a synapomorphy: completely or almost completely divided ungual flaps. Both genera also have dorsal skin composed of small, flat, pliable (not keratinized) warts, and lack nuptial pads in adult males. They differ in that Dischidodactylus possess a dentigerous process of the vomer, and in that Ceuthomantis lack basal toe webbing.[3] However, the AmphibiaWeb places Dischidodactylus in an entirely different family, Strabomantidae, implying a distant relationship with Ceuthomantis.[4]

Description

Dischidodactylus are smallish frogs that reach a maximum snout–vent length of 43 mm (1.7 in) in females. Their head is not as wide as body. Tympanic membrane is not differentiated and tympanic annulus is visible below skin. Cranial crests are absent. Vomers have small, oblique dentigerous processes. Terminal discs are expanded, rounded, and bifurcate; circumferential groove is present and terminal phalanges are T-shaped. Dorsum is granular and venter is areolate.[2]

Species

The genus contains two species:[1][4]

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References
  1. Frost, Darrel R. (2017). "Dischidodactylus Lynch, 1979". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 14 July 2017.
  2. Hedges, S. B.; Duellman, W. E. & Heinicke, M. P (2008). "New World direct-developing frogs (Anura: Terrarana): Molecular phylogeny, classification, biogeography, and conservation" (PDF). Zootaxa. 1737: 1–182. doi:10.11646/zootaxa.1737.1.1.
  3. Padial, J. M.; Grant, T.; Frost, D. R. (2014). "Molecular systematics of terraranas (Anura: Brachycephaloidea) with an assessment of the effects of alignment and optimality criteria". Zootaxa. 3825: 1–132. doi:10.11646/zootaxa.3825.1.1. PMID 24989881.
  4. "Strabomantidae". AmphibiaWeb. University of California, Berkeley. 2017. Retrieved 14 July 2017.
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