Apheloria virginiensis reducta

Chamberlin, 1939

Yellow-and-black millipede, Cyanide millipede

A large, colorful in the Xystodesmidae, distinguished by its black body with bright yellow or orange wedge-shaped posterolateral markings. Like other members of its , it produces hydrogen cyanide as a chemical defense, advertised by its conspicuous aposematic coloration. The represents a western of A. virginiensis, with records extending from the Appalachian region through the Ozark Plateau to the Arkansas Delta.

Pronunciation

How to pronounce Apheloria virginiensis reducta: //ˌæfɪˈlɔːriə vɜːˌdʒɪniˈɛn.sɪs rɪˈdʌk.tə//

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Identification

The can be distinguished from other Apheloria by its black coloration with yellow to orange wedge-shaped markings on the posterolateral corners of the segments. The paranota (lateral expansions of dorsal segments) are well-developed, giving a flattened appearance compared to cylindrical millipedes. The wrinkled dorsal surface texture and overall large size (approximately 2 inches in length) are additional diagnostic features. Similar in the share this general color pattern but may differ in marking shape, intensity, and geographic distribution.

Habitat

Deciduous forest with abundant leaf litter, particularly bottomland hardwood forests and mixed oak-hickory woodlands. Requires moist conditions with standing water or high humidity. Found in association with rocky outcrops and forest floor debris in glade and woodland environments.

Distribution

Native to eastern and central North America. Original type locality in Virginia (Appalachian region). Range extends westward through the Ozark Plateau (Missouri, Arkansas) with a documented westward extension to the Arkansas Delta (Desha County, Arkansas).

Diet

, feeding on decaying plant matter in leaf litter and soil.

Ecological Role

Contributes to decomposition processes in forest through consumption and fragmentation of decaying plant material.

Human Relevance

Produces hydrogen cyanide as a defensive compound; handling may cause irritation. The bright coloration serves as a warning to and humans alike.

Similar Taxa

  • Pleuroloma flavipesSimilar black-and-yellow coloration and hydrogen cyanide defense; distinguished by yellow legs (flavipes = 'yellow feet') and different paranota structure
  • Cherokia georgianaOverlapping geographic range in southeastern US; similar aposematic coloration but differs in segmental and marking pattern
  • Boraria strictaShares Xystodesmidae and general flattened body form; distinguished by more restricted Appalachian distribution and subtle differences in color pattern

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