Redescription of the tadpoles of Epipedobates narinensis and E. boulengeri (Anura: Dendrobatidae). The larval morphology of poison frogs (Dendrobatoidea) has contributed to an understanding of the phylogenetic relationships within the superfamily. Nevertheless, our knowledge of larval morphology is incomplete. The larvae of the dendrobatids, and are redescribed, diagnosed, and differentiated from three congeners, as well as sympatric dendrobatoids and closely related genera. Three larval developmental phases are described-viz., (1) back-riding tadpoles, (2) free-swimming tadpoles, and (3) metamorphosing tadpoles. Each larval phase is characterized by ontogenetic changes in external morphology, and there is also morphological variation within each developmental phase. Ontogenetic morphological changes are the most marked in back-riding and metamorphosing phases. The external features of free-swimming tadpoles do not change abruptly, but ontogenetic changes occur in the marginal papillae, stitches of the lateral line system, and tail coloration. Four features that have not been considered previously distinguish species-groups and/or generamoderate A-2 gap; presence of shelf on back of the upper jaw sheath [UJS]; moderate notch on mid-UJS; and nostril size; these characters are putative synapomorphies of Metamorphosing tadpoles have some adult features, such as the color Keywords: A-2 gap size, anteroventral coloration, Colostethinae, larval characters, nostril, ontogenetic variation.
156Phyllomedusa -16(2), December 2017
ResumenRedescripción de los renacuajos de Epipedobates narinensis y E. boulengeri (Anura: Dendrobatidae).La morfología larvaria de las ranas venenosas (Dendrobatoidea) ha contribuido en el entendimiento de las relaciones de parentesco dentro de la superfamilia. No obstante, nuestro conocimiento de la morfología larvaria permanece incompleto. Por esta razón, en el presente trabajo se redescriben, diagnostican y se diferencian los renacuajos de y desde sus tres fases larvarias-viz., (1) renacuajos de espalda, (2) renacuajos nadadores-libres y (3) renacuajos a diferencia de la morfología de los renacuajos nadadores-libres que no cambia abruptamente, laterales, y en la coloración de la cola. Cuatro caracteres no habían sido considerados previamente la parte interna del UJS, muesca moderada sobre la mitad del UJS y tamaño de la narina; estos Los renacuajos que inician la metamorfosis presentan algunas características de adultos, tales como el patrón de de especies. (1) girinos transportados no dorso de adultos, (2) girinos livre-natantes e (3) girinos em processo de mais marcantes nos girinos transportados no dorso e nos girinos em processo de metamorfose. As características externas dos girinos transportados no dorso não mudam abruptamente, mas ocorrem da cauda. Quatro caracteres que não haviam sido considerados previamente distinguem grupos de superior (UJS), entalhe moderado na metade de UJS e tamanho da narina; esses caracteres são Os girinos em processo de metamorfose apresentam algumas ca...
