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A cockroach that jumps.

Mike Picker¹, Jonathan F Colville, Malcolm Burrows

¹Zoology Department, University of Cape Town, Rondebosch, Cape Town, South Africa. mike.picker@uct.ac.za

Biology Letters

|December 14, 2011

Summary

This summary is machine-generated.

A newly discovered South African cockroach, Saltoblattella montistabularis, exhibits jumping locomotion, unlike other known species. Its powerful hind legs store and release energy for impressive leaps, rivaling grasshoppers.

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Area of Science:

Zoology
Biomechanics
Insect Morphology

Background:

Most cockroach species exhibit scuttling locomotion.
Jumping is an unusual locomotory behavior in insects, typically associated with saltatorial species like grasshoppers.

Purpose of the Study:

To describe a newly discovered jumping cockroach species, Saltoblattella montistabularis.
To investigate the biomechanics and anatomical adaptations enabling jumping in this unique cockroach.

Main Methods:

High-speed videography to analyze jump kinematics.
Analysis of hind leg morphology and musculature.
Measurement of jump performance parameters (velocity, distance, force, energy, power).

Main Results:

Saltoblattella montistabularis utilizes jumping for 71% of its locomotion in its natural habitat.
Jumps are powered by rapid extension of elongated hind legs, storing energy via a catapult mechanism involving grooved femora, tibiae, and resilin at the femoro-tibial joint.
The cockroach achieves high take-off velocities and accelerations (23g), covering distances up to 48 times its body length, rivaling grasshopper performance.

Conclusions:

The discovery of Saltoblattella montistabularis reveals a novel locomotory adaptation within the Blattodea.
Its jumping mechanism and hind leg anatomy demonstrate remarkable convergent evolution with grasshoppers, highlighting similar solutions to biomechanical challenges.
This finding expands our understanding of insect locomotion and evolutionary adaptations.