Xystodesmini

Classification

Phylum: Arthropoda
Subphylum: Myriapoda
Class: Diplopoda
Order: Polydesmida
Family: Xystodesmidae
Tribe: Xystodesmini

Pronunciation

How to pronounce Xystodesmini: /zɪstoʊˈdɛzmɪnaɪ/

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Summary

Harpaphe is a genus of flat-backed millipedes comprising three species native to the Pacific Northwest, with H. haydeniana being the most widespread across various geographical regions.

Physical Characteristics

Millipedes of the genus Harpaphe have a flat-back appearance with variations among species in color and morphology; H. haydeniana has six subspecies that show distinct geographical coloration.

Identification Tips

Look for flat-backed bodies and different coloration patterns in various subspecies as identification markers.

Habitat

Native to the Pacific Northwest of North America, typically found in forested areas.

Distribution

Harpaphe haydeniana ranges from Monterey County, California to Southeast Alaska; H. pottera is found in Mendocino and Humboldt Counties; H. telodonta occurs in Humboldt and Del Norte Counties, California.

Diet

Detritivores, feeding on decaying plant material.

Life Cycle

Information on the specific life cycle is limited, but like other millipedes, they undergo several molts before reaching maturity.

Reproduction

Reproductive habits are typical of millipedes, involving direct mating and the laying of eggs in the soil or leaf litter.

Predators

Natural predators may include birds, mammals, and other invertebrates that feed on small arthropods.

Ecosystem Role

Important for the decomposition of organic matter and nutrient cycling in forest ecosystems.

Health Concerns

Generally not harmful; some species may release defensive chemicals.

Evolution

The tribe Xystodesmini has evolved to adapt to various ecological niches in the Pacific Northwest.

Similar Taxa

Other genera under the family Xystodesmidae such as Xystodesmus and Phyllogonistria.

Misconceptions

Millipedes are often mistaken for centipedes; however, millipedes have two legs per body segment and are typically more rounded than centipedes.