The only "lungless" frog has a glottis and lungs.

Area of Science:

• Amphibian biology
• Comparative anatomy
• Respiratory physiology

Background:

• The "lungless" frog (Atretochoana eiselti) was described as lacking lungs based on external morphology.
• Previous studies focused on external features, leading to the classification of this amphibian as lungless.

Discussion:

• CT-scanning reveals the presence of a glottis and internal lung structures in the "lungless" frog.
• This finding necessitates a re-evaluation of respiratory adaptations in amphibians.
• The study highlights the importance of advanced imaging techniques in anatomical research.

Key Insights:

• The "lungless" frog is not truly lungless and possesses pulmonary structures.
• Reclassification of amphibian respiratory diversity is required.
• Morphological interpretations can be revised with advanced technology.

Outlook:

• Further research into the respiratory function and evolutionary history of this species.
• Investigating other "lungless" amphibians for similar hidden pulmonary structures.
• Exploring the functional significance of lungs in predominantly aquatic or terrestrial amphibians.