This species is known only from two localities in the state of Bahia in eastern Brazil: Fazenda Luzitania on the Rio Almada near Ilheus; and Santa Teresinha. It presumably occurs more widely, including in intervening areas between the two known localities. It is found up to 800m asl.
At Fazenda Luzitania, a single specimen was collected in a cacao farm under cacao trees, bananas and some larger, emergent shade trees, on the ground in the leaf-litter near a small creek. At Santa Teresinha specimens were collected in terrestrial bromeliads in forest. This species is presumed to breed by direct development.
Hoogmoed, M.S., Borges, D.M. and Cascon, P. 1994. Three new species of the genus Adelophryne (Amphibia: Anura: Leptodactylidae) from northeastern Brazil, with remarks on the other species of the genus. Zoologischer Mededelinger Leiden: 271-300.
IUCN. 2004. 2004 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 23 November 2004.
Diva Borges-Najosa, Flora Junca. 2004. Adelophryne pachydactyla. The IUCN Red List of Threatened Species 2004: e.T56303A11453124. . Downloaded on 30 November 2015.
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