MANTISES ARE RELATED TO ROACHES??

MANTISES ARE RELATED TO ROACHES??

yes! while they do have differing ecologies—mantises generally are elongate, diurnal predators and cockroaches generally are flattened, nocturnal detritivores—it’s not so surprising if you take a closer look:

MANTISES ARE RELATED TO ROACHES??

they are one another’s closest relatives, being grouped together in the superorder Dictyoptera, which is revealed by their many shared anatomical features.

MANTISES ARE RELATED TO ROACHES??
MANTISES ARE RELATED TO ROACHES??

if you compare the wing structure on these two, you’ll find the veins are very similar. to get a mantis out of a roach, evolutionarily speaking, all you’ve got to do is elongate the pronotum (roach head shield, mantis ‘torso’), elongate the legs, and enlarge the eyes.

mantises and roaches also both produce “oothecae,” tough eggcases in which eggs are protected from the environment. mantis ooths are often made of sturdy, hard foam, while roach ooths are leathery and purse-like.

MANTISES ARE RELATED TO ROACHES??
MANTISES ARE RELATED TO ROACHES??

the raptorial legs of mantises aren’t too greatly modified from a roach forelimb, either. roaches already have spiny legs for digging and defense; with additional spines organized in rows, there’s a powerful grasping foreleg.

additionally, some of the most basal (least changed from the original ancestor) mantises retain a number of very roach-like features, such as flat bodies, a short pronotum, and long cerci (“butt antennae”). Chaeteessa doesn’t even have the long spike at the end of the tibia segment! although I’m not entirely sure if all of these roachy structures are necessary primitive and not secondarily derived, these two do give a good look at how mantises might’ve looked before they evolved the characteristic spindly green forms you recognize today.

Metallyticus fallax
iNaturalist
Metallyticus fallax from 115, Jalan Bukit Idaman 1, Taman Bukit Idaman, 68100 Batu Caves, Selangor, Malaysia on April 20, 2019 at 01:25 PM b
Genus Chaeteessa
iNaturalist
Chaeteessa from Limón, Costa Rica on January 27, 2023 at 12:29 PM by Martin Galli

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saishiichuus - Saishiichuus
Saishiichuus

Hoshi appreciator and Saihoshi enthusiast. I ramble, complain and draw sometimes. Icon by Poof!

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