- Adult: Old St Ives Railway, TL464614; 20 Sep 2002
- Nymphs: Adams Road LNR, TL437587; 4 Sep 2007
- Family Acanthosomatidae
- Takes its common name from the protective care which the females exercise over eggs and young nymphs.
- The nymphs, on birch or alder, cluster together even without the parent's presence.
- Length: 7mm