Dyspnoi

Dyspnoi is a suborder of harvestmen (order Opiliones), a diverse group of arachnids commonly known as daddy longlegs. Members of Dyspnoi inhabit a range of habitats, including forest leaf litter, rotting wood, caves, and rock crevices. They are one of the major lineages within Opiliones and display substantial morphological variation, but are typically distinguished from other harvestmen by certain structural traits used in taxonomy.

Geographic distribution spans temperate and subtropical regions worldwide, with many species in Europe and North America and notable diversity in Asia. Many Dyspnoi prefer moist microhabitats and are primarily active at night.

Ecology: Dyspnoi are generally omnivorous, feeding on small invertebrates, detritus, and fungal material. They contribute to leaf litter communities by aiding decomposition and by serving as prey for larger predators. They rely on tactile and chemical cues to explore their surroundings.

Reproduction: Like other harvestmen, Dyspnoi lay eggs. In some lineages paternal care occurs, with males guarding eggs and sometimes accompanying hatchlings. Development is direct, with juveniles resembling small adults.

Taxonomy and evolution: Dyspnoi comprises several families grouped into major lineages within Opiliones. The exact relationships among these groups are actively studied, using morphological and molecular data. Fossil records for Opiliones extend into the Paleozoic, but the deep history of Dyspnoi remains incompletely understood.