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Polydesmida

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Kingdom  Animalia
Superorder  MerochetaCook, 1895
Phylum  Arthropoda
Rank  order
Subphylum  Myriapoda
Scientific name  Polydesmida
Higher classification  Millipede
Polydesmida Order Polydesmida
Lower classifications  Xystodesmidae, Orthomorpha
Similar  Paradoxosomatidae, Orthomorpha, Leptodesmidea

Fire millipedes polydesmida brochopeltis mjoebergi


Polydesmida (from the Greek poly "many" and desmos "bond") is the largest order of millipedes, containing approximately 3,500 species, including all the millipedes reported to produce hydrogen cyanide (HCN).

Contents

Polydesmida in michigan


Description

Polydesmida Polydesmida Flatbacked Millipedes Oxidus gracilis BugGuideNet

Members of the order Polydesmida are also known as "flat-backed millipedes", because on most species, each body segment has wide lateral keels known as paranota. These keels are produced by the posterior half (metazonite) of each body ring behind the collum. Polydesmids have no eyes, and vary in length from 3 to 130 mm (0.12 to 5.12 in). Including the telson, adults have 19 or 20 rings, while juveniles may have from 7 to 19 rings. Mature males have a single pair of gonopods consisting of the modified forward leg pair of the 7th segment. Many of the larger species show bright coloration patterns which warn predators of their toxic secretions.

Ecology

Polydesmida httpsuploadwikimediaorgwikipediacommonsthu

Polydesmids are very common in leaf litter, where they burrow by levering with the anterior end of the body.

Classification

Polydesmida FilePolydesmidaJPG Wikimedia Commons

The c. 3500 species of Polydesmida are variously classified into four suborders (names ending in "-idea"), and 28 families, the largest (numerically) including Paradoxosomatidae, Xystodesmidae, and Chelodesmidae.

Polydesmida Polydesmida

References

Polydesmida Wikipedia


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