| Opisthocheiridae | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Subphylum: | Myriapoda |
| Class: | Diplopoda |
| Order: | Chordeumatida |
| Superfamily: | Cleidogonoidea |
| Family: | Opisthocheiridae |
Opisthocheiridae is a family of millipedes belonging to the order Chordeumatida. [1] This family includes 40 species distributed among seven genera. [2] These millipedes are found in western Europe and Morocco. [3]
Millipedes in this family range from 5 mm to 16 mm in length. The paranota are small humps and hardly developed sometimes. The posterior gonopods have from one to three segments. [3] Adult millipedes in this family have 26 or 30 segments (counting the collum as the first segment and the telson as the last). [4] [3] This family includes the cave-dwelling species Opisthocheiron canayerensis , notable as one of only a few chordeumatidan species with only 26 segments in adults, four fewer segments than typically found in adults in this order. [5] [4]
This family includes seven genera: [1] [2]