flat-backed millipedes

(Order Polydesmida)

Overview
flat-backed millipede (Order Polydesmida)
 
  Polydesmida (flat-backed millipedes) is the largest order of millipedes. It occurs on every continent worldwide except Antarctica and Greenland. There are about 3,500 species that have been described and more than that yet to be described. They are found in almost all habitats in leaf litter, under the bark of rotting logs, under rocks, and on living trees. They feed on decaying vegetation or the leaves and shoots of live plants. When threatened they exude irritants from pores along the sides of their body.      
           
 
Description
 
 

Flat-backed millipedes are named for flattened, wing-like extensions (paranota) on the sides of each body segment on most species. Many also appear flattened when viewed from the side. However, some are cylindrical and have reduced paranota or no paranota. All are blind and lack eyes. Mature adults are to 5 (3 to 130 mm) long. They have 19 or 20 body rings. There is no dorsal groove. On the male, the front pair of legs on the seventh ring are modified as reproductive structures (gonopods), while the hind pair are normal walking legs.

 
     
 
Distribution
 
 

Distribution Map

 

Sources

7, 24, 29, 30, 82.

 
  9/26/2020      
         
 
Taxonomy
 
 

Subphylum

Myriapoda (myriapods)  
 

Class

Diplopoda (millipedes)  
  Subclass Helminthomorpha  
       
 

 

 
       
 

Subordinate Taxa

 
 

Suborder Chelodesmidea

Suborder Paradoxosomatidea

Suborder Polydesmidea

 
       
 

Synonyms

 
 

 

 
       
 

Common Names

 
 

flat-backed millipedes

 
       

 

 

 

 

 

 

 

 

 

 

 

 

 
 
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MinnesotaSeasons.com Photos
 
 

Flat-backed millipede on cowpie

 
    flat-backed millipede (Order Polydesmida)   flat-backed millipede (Order Polydesmida)  
           
    flat-backed millipede (Order Polydesmida)      
           

 

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Other Videos
 
  Polydesmida
Paul Mosquera
 
   
 
About

May 8, 2016

 
       

 

Camcorder

 
 
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Created: 9/26/2020

Last Updated:

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