👉 Holotrichius is a genus in the family Sphenacaridae, which belongs to the order Pseudopodae. This group of animals has a long history and diverse range that includes both aquatic and terrestrial species. They are characterized by their distinctive quadrupedal form and have a short body length compared to their wingspan. Holotrichius is named after its genus name, which refers to the large size of the animal's legs. These legs can be found on