Thatonia Gates, 1942
- Male pores in xviii.
- Gizzard in vii, a dendritically branched system of spaces (opening into gut lumen) in thickened ventral wall of oesophagus in ix-x.
- Intestinal origin in xii.
- Typhlosole, caecae and supra-intestinal glands absent.
- Lumbricine, closely paired.
- Dorsal pores, and pigment lacking.
- Holonephric, avesiculate, ducts passing parietes to b.
- Five species recorded in India viz.,
| S. No | Species | Type locality | Status |
|---|---|---|---|
| 1 | bolangirensis | Bolangir (Balangir), Odisha, India | Endemic |
| 2 | exilis | Nowgong, Madhya Pradesh, India | Native peregrine |
| 3 | gracilis | Thongwa, Myanmar | Endemic |
| 4 | parva | Satna, Madhya Pradesh, India | Endemic |
| 5 | sambalpurensis | Sambalpur, Odisha, India | Endemic |