ubstantial molecular and morphological character differences lead us to the description of a new species of the genus Pristimantis from the cloud forest of Cerro Chucantí, Maje Mountains, Darien Province, as well as from several other mountain ranges in eastern and central Panama. Pristimantis gretathunbergae sp. nov. is a sister species to the allopatric P. erythropleura-penelopus group from northern Colombia with a mtDNA sequence divergence of > 4.4% at 16S and > 14.6% at COI. Leer más.
The Black-spotted Casque-headed Tree Frog lives in bromeliads or hollowed out tree branches in the primary and secondary forests as well as the coastal scrubs of southeastern Brazil. Leer más.
Armoured, rigid bodied animals, such as Testudines, must self-right should they find themselves in an inverted position. The ability to self-right is an essential biomechanical and physiological process that influences survival and ultimately fitness. Traits that enhance righting ability may consequently offer an evolutionary advantage. However, the energetic requirements of self-righting are unknown. Leer más.
Felipe Suazo, investigador de la U. de Chile, identificó especímenes dos tipos de ranas que vivieron hace más de 70 millones de años junto a dinosaurios como saurópodos, hadrosaurios y el recientemente descrito Stegouros elengassen. El estudio confirma que ambas familias lograron sobrevivir al evento de extinción masiva ocurrido hace 66 millones de años. Leer más.
