Eusociality

Eusociality is a hierarchical social system characterized by cooperative brood care, division of labor in reproductive and non-reproductive groups, and overlap of generations, as well as, in advanced eusociality, morphological distinctions between reproductive and non-reproductive groups. Most eusociality documented is within the phylum Arthropoda, although advanced eusociality has also been observed in several species of naked mole rats.

Insecta
Insect eusociality is most extensive in the order Hymenoptera, which includes ants, bees, and wasps.

Synalpheus
Eusociality has also been documented in the Synalpheus genus of snapping shrimp.