Allometry and ontogeny in Callibia diana Stål (Mantodea: Acanthopidae).

Area of Science:

• Entomology
• Developmental Biology
• Morphometrics

Background:

• The life cycle of neotropical mantids, specifically Callibia diana, involves significant morphological changes.
• Understanding ontogenetic allometry and shape transformation is crucial for insect ecology and evolution.

Purpose of the Study:

• To describe the life cycle of Callibia diana.
• To investigate allometric and shape changes in Callibia diana throughout its life cycle using morphometric techniques.
• To correlate morphological changes with functional aspects like hunting and reproduction.

Main Methods:

• Life-cycle description of Callibia diana.
• Application of linear and geometric morphometrics to study allometry and shape.
• Analysis of landmark data for the frontal femur and tibia.
• Utilizing total length as the independent variable for allometric slope calculation.

Main Results:

• Hunting and reproduction-related structures exhibited the steepest positive allometries.
• Negative allometry in disc and head width during the final molt suggests reallocation for enhanced predatory strike.
• Raptorial leg femur and tibial claw increased in size, with spines becoming more orthogonal for improved prey retention.

Conclusions:

• Ontogenetic shape changes in Callibia diana are consistent and programmed.
• Resource allocation shifts during development enhance predatory capabilities and prey retention.
• Morphological adaptations throughout the life cycle are critical for survival and reproduction in this mantid species.