Octostigmatidae

Definition

A small family of diplurans (class Diplura) erected by Rusek in 1982, containing the single genus Octostigma. Members are characterized by eight stigmata (spiracles), a trait reflected in the family name. The family includes three described species: O. herbivora, O. sinensis, and O. spiniferum. Diplurans in this family are small, elongate, blind hexapods that inhabit soil and leaf litter, where they feed on decaying organic matter or fungal hyphae.

Etymology

From Greek okto- (eight) + stigma (mark, spot, or spiracle), referring to the eight stigmata characteristic of the family; + -idae, the standard family suffix in zoological nomenclature.

Example

Specimens of Octostigma herbivora collected from forest floor litter in China helped establish that Octostigmatidae represents a distinct lineage among dipluran families based on spiracle number and chaetotaxy.

Related Terms

• Diplura
• Octostigma
• Japygidae
• Projapygidae
• Campodeidae
• hexapod
• Apterygote
• entognath

Usage Notes

The family is monogeneric and species-poor, making it a minor but phylogenetically informative lineage within Diplura. Octostigmatidae is distinguished from the larger, more diverse families Japygidae and Campodeidae partly by spiracle count and abdominal segmentation. The group is rarely encountered in general entomological surveys due to its cryptic habitat and small size.