The Order Eccrinales is a group of microscopic, fungus-like organisms that were once classified as fungi but are now considered part of the Opisthokonta lineage, closely related to animals and fungi. Members of Eccrinales are primarily endosymbionts or commensals living in the digestive tracts of arthropods and other invertebrates. They have simple filamentous structures and reproduce asexually, often forming spores that help them persist in their hosts or the environment. While they do not cause significant harm, Eccrinales play a role in the microbial ecology of their hosts, contributing to nutrient cycling and digestive processes.