Hesse, 1876
Description:
Female asymmetrically pyriform, with an acute cornered cephalon. Pereion with prominent lateral plates, which are more or less contiguous; oostegites overlapping ventrally in adult. Pleon segments well-defined, fairly long and pointed lateral plates and long projecting, tuberculate pleopods; uropods present. Male with pleon segments fused.
Habitat:
In the branchial cavity of Porcellana longicornis .
Distribution:
Southern North sea, and all British coasts, locally distributed and rare.