Harpaphe haydeniana (the yellow-spotted millipede, almond-scented millipede or cyanide millipede) is a species of polydesmidan (‘flat-backed’) millipede. English: Harpaphe haydeniana is a millipede native to the Pacific Northwest of North America. Individuals with similar coloration outside of this. General Description. Harpaphe haydeniana, in the Order. Polydesmida (flat- backed millipede), is also known as the almond-scented millipede.

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Harpaphe haydeniana

Synonyms and other taxonomic changes. A millipede with a flattened body. It has a shiny black body sometimes with a bluish-green sheen with bright yellow patches on the outside portion of most segments.

West Coast of NA: Southeast Alaska to Monterey County, California.

ARCHIVE – Harpaphe haydeniana – ize

East to the Sierra Nevada. As with other millipedes, Haraphe haydeniana is a vegetarian and scavenger.

This particular millipede secretes a dark fluid that has an odor similar to the almond extract used in cooking. Apparently this is harpqphe defensive manuveur.

Millipedes also curl up in tight coils when threatened. Many millipedes with bright harpahpe patterns secrete a compound containing cyanide. Wash your hands after handling them and do not allow children to pick them up.

Some secretions discolor the skin, but this wears hxydeniana in a few days without lasting effect. Some large, cylindrical, tropical species squirt their defensive secretions up to a half meter feet and can blind chickens and dogs.


Their fluids are painful if they get into the eyes, and persons hayeniana with tropical millipedes should be suitably cautious. Chonaphe is quite similar in the same region.

File:Harpaphe haydeniana JPG – Wikimedia Commons

Photos from East Carolina Haydejiana. Contributed by Lynette Elliott on 16 April, – 7: Bugguide is hosted by: Size maximum length of 40 mm Identification A millipede with a flattened body. Range West Coast of NA: Habitat It tends to live in moist forests.