A brand new frog species from the Wei-Assipu-tepui tabletop mountains of Brazil has been described by researcher Philippe Kok of the Division of Ecology and Vertebrate Zoology, College of Łódź in Poland.
The frog, Stefania maccullochi sp. nov. is a bigger species within the Stefania genus. The feminine holotype measured 72.9mm in size and the males measured 54.6 mm in size. It differs from others within the genus in that it’s bigger than others, corresponding to Stefania ayangannae and Stefania coxi, but is analogous in measurement to S. riveroi.
Essential colour sample variation in Stefania maccullochi sp. nov. A IRSNB 15854, male. B NHMUK 2023.3188 (PK2098), feminine. C IRSNB 15855, feminine. D NHMUK 2023.3193 (PK2148), male. E NHMUK 2023.3192 (PK2137), male. F NHMUK 2023.3187 (PK2084), male. Images by Philippe Kok
Stefania maccullochi is medium brown in coloration with 4 to 5 faint darkish chevrons in addition to scattered darkish brown marks on the pores and skin. The flanks are medium brown and present some mottling. The fingers and toes are additionally medium brown with mottling and yellowish-brown spots. Some can seem purple in coloration with no seen spots.
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The frog is basically nocturnal, as they had been discovered at night time transferring on the bottom or in low vegetation. This explicit frog carries its eggs on the again, and as soon as hatched, the froglets stay on the again for a time frame. Kok says Stefania maccullochi is a micro endemic and morphologically/taxonomically cryptic species of the S. riveroi clade. This clade is at present restricted to the highlands and uplands of the Jap Tepui mountain chain in Venezuela, Guyana and Brazil, in addition to the Pakaraima Mountains in western Guyana. Stefania maccullochi is simply identified to exist within the Wei-Assipu-tepui tabletop mountain that sits on the border of Guyana and Brazil. It’s critically endangered by the IUCN.
Varied females of Stefania maccullochi sp. nov. carrying eggs and juveniles. A and B. Uncollected feminine carrying 9 juveniles. C. NHMUK 2023.3190 (PK2122), carrying 10 eggs/metamorphs. D. NHMUK 2023.3185 (PK2063), carrying 2 near-term juveniles. E and F. IRSNB 15853, carrying 4 near-term juveniles. Images by Philippe Kok
The entire paper describing the species, “Bones and all: a brand new critically endangered Pantepui species of Stefania (Anura: Hemiphractidae) and a brand new osteological synapomorphy for the genus” may be learn on the Zoological Letters web site.
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