Adelophryne michelin Lourenço-de-Moraes, Dias, Mira-Mendes, Oliveira, Barth, Ruas, Vences, Solé & Bastos, 2018
Michelin Flea Frog; razinha-pulga-da-Michelin
|Species Description: Lourenco-de-Moraes R, Dias IR, Mira-Mendes CV, Oliveria RMde, Barth A, Ruas DS, Vences M, Sole M, Bastos RP 2018 Diversity of miniaturized frogs of the genus Adelophryne (Anura: Eleutherodactylidae): a new species from the Atlantic Forest of northeast Brazil. PLoS One: https://doi.org/10.1371/journal.pone.0201781|
Adelophryne michelin can be distinguished from species in the Phyzelaphryne genus by A. michelin having an indistinct tympanum and smaller size. From members of its own genus, A. adiastola, A. baturitensis, A. gutturosa, A. maranguapensis, A. mucronata, A. pachydactyla, and A. patamona all have distinct tympanums. Adelophryne michelin is smaller than A. baturitensis, A. gutturosa, A. maranguapensis, A. mucronata, and A. patamona. However, it can also be differentiated from A. baturitensis and A. maranguapensis by the lack of discs or circumferential grooves on the fingers in A. michelin. The absence of subarticular tubercles in A. michelin can also differentiate it from A. baturitensis. The absence in a distinct glandular ridge from the eye to the forelimb in A. michelin differentiate it from A. glandulata and A. gutturosa. Smooth skin in A. michelin differentiate it from A. adiastola, A. glandulata, A. mucronata, and A. patamona. Adelophryne michelin have more toes with circumferencial grooves than A. meridionalis. Lastly, the absence of an anal flap in A. michelin differentiate it from A. mucronata and A. maranguapensis (Lourenço-de-Moraes et al. 2018).
In life, the dorsum is slightly golden with two dark brown stripes of various width in the middle region in an upside down “V” shape. There is a dark brown interorbital stripe in a “V” shape. The loreal region is dark brown. The flanks also have a dark brown stripe extending along the flanks to the groin with small white dots. The thigh and tibia have one or two dark band stripes. The forelimb can be red in some specimens. The venter can either be dark with scattered white spots or have a uniform coloration. The throat and underside of thighs and shanks are slightly golden. The iris is reddish brown with black reticulations (Lourenço-de-Moraes et al. 2018).
In preservative, A. michelin has a brown dorsum with numerous small white and black dots. The loreal region is black and has a black stripe extending along the flanks to the groin, with numerous white dots. The species also has a black interorbital stripe in a “V” shape, in which the lines don’t connect, and black upper eyelids. Both the thigh and tibia have numerous black dots that form lines. The venter is brown and the throat is dark brown (Lourenço-de-Moraes et al. 2018).
The dorsal coloration varies in life, with most showing a very light, slightly golden pattern, but some individuals also show a bluish coloration. Formula of pads and discs varies in number. Males are smaller than females and have more depressed toes IV and V than females (Lourenço-de-Moraes et al. 2018).
Distribution and Habitat
Life History, Abundance, Activity, and Special Behaviors
The species lives in leaf litter habitat (Lourenço-de-Moraes et al. 2018).
The species was found to eat ants after examining stomach content (Lourenço-de-Moraes et al. 2018).
Trends and Threats
Possible reasons for amphibian decline
General habitat alteration and loss
Bayesian Inference and Maximum Likelihood analyses on mitochondrial 16S rRNA found that A. michelin is a sister to a clade formed by two undescribed Adelophryne species. Together they are sister to a clade composed of A. baturitensis and A. maranguapensis. The five species form the North Atlantic Forest Clade (Lourenço-de-Moraes et al. 2018).
Adelophryne michelin is named after the Reserva Ecológica Michelin where it was found (Lourenço-de-Moraes et al. 2018).
Lourenco-de-Moraes, R., Dias, I. R., Mira-Mendes, C. V., Oliveira, R. M. de, Barth, A., Ruas, D. S., Vences, M., Solé, M., Bastos, R. P. (2018). "Diversity of miniaturized frogs of the genus Adelophryne (Anura: Eleutherodactylidae): A new species from the Atlantic Forest of northeast Brazil." PLOS ONE, 13(9), e0201781. [link]
Originally submitted by: Louise Andersson (2023-04-04)
Description by: Louise Andersson (updated 2023-04-04)
Distribution by: Louise Andersson (updated 2023-04-04)
Life history by: Louise Andersson (updated 2023-04-04)
Trends and threats by: Louise Andersson (updated 2023-04-04)
Comments by: Louise Andersson (updated 2023-04-04)
Edited by: Ann T. Chang (2023-04-04)
Species Account Citation: AmphibiaWeb 2023 Adelophryne michelin: Michelin Flea Frog; razinha-pulga-da-Michelin <https://amphibiaweb.org/species/8913> University of California, Berkeley, CA, USA. Accessed Dec 11, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 11 Dec 2023.
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