Developmental changes and novelties in ceratophryid frogs.

Area of Science:

• Herpetology
• Evolutionary Biology
• Developmental Biology

Background:

• The Neotropical frog family Ceratophryidae includes genera Ceratophrys, Chacophrys, and Lepidobatrachus.
• While their monophyly is supported, the role of developmental pathways in shaping their unique body plans is understudied.

Purpose of the Study:

• To review morphological variation during ceratophryid ontogeny.
• To explore the role of developmental modifications in the evolution of Ceratophryidae.

Main Methods:

• Review of existing morphological and molecular data.
• Comparative analysis of ontogenetic variation across ceratophryid genera.

Main Results:

• Ceratophryids exhibit rapid larval development compared to other anurans.
• Derived traits include homoplastic features for fossorial/burrowing behaviors and novel feeding mechanisms for large prey.
• Lepidobatrachus shows reduced ecomorphological differences between larvae and adults, with unique developmental exaggerations like posterior jaw displacement.

Conclusions:

• Developmental pathways significantly influenced the evolution of ceratophryid body plans.
• Unique ontogenetic strategies, particularly in Lepidobatrachus, enable specialized feeding and adaptation to semiarid environments.