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En otras especies de la subfam ilia H ylinae — a la que tam­ bién pertenece el género Hy/a— , las hembras depositan su puesta en huecos de árboles llenos de agua. Estas ranas perte­ necen al género uniespecífico Anotheca, del sur de M éxico y Am érica Central, y a las especies Nyctim antes rugiceps de la Am azonia ecuatoriana y Phrynohyas resinificalrix de la Am a­ zonia brasileña. Para depositar sus huevos, las hembras de las denominadas ranitas de las hojas seleccionan hojas que cuelgan o se extien­ den sobre el agua.

Esta especie es m uy apreciada por los directores de H ollyw ood — aunque m uchos de ellos no sabrían recono­ cerla si la vieran— porque con su llam ada de apareamiento pueden obtenerse sonidos nocturnos naturales auténticos. Para concluir con los hílidos norteamericanos, cabe citar las minúsculas «ranitas grillo» del género A cris, que son diurnas, semiacuáticas y muy escondedizas y que reciben el epíteto de «grillo» por sus penetrantes y agudos reclamos, similares a los de estos insectos. Una de las especies de este género, A .

El tamaño de los bufónidos oscila entre los escasos 2 cm de longitud de los negros sapos O reophrynella de los cerros y tepuís del sur de Venezuela y de las Guayanas y los 25 cm del gigantesco y relativamente contrastado — su dorso es de color café con leche y el resto del cuerpo marrón chocolate— Bufo blombergi, el sapo gigante de las selvas subandinas de Co­ lombia. La fam ilia bufónidos comprende 340 especies que se repar­ ten en 25 géneros y se distribuyen por gran parte de Eurasia, toda África excepto las zonas más desérticas, toda América del Sur y del Centro y gran parte de Norteamérica.

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