(from Australian Faunal Directory; https://biodiversity.org.au/afd/taxa/PHILOSCIIDAE ; accessed 17 August 2022): Animals do not conglobate. Pleonal epimera 3–5 small so that body outline is interrupted between pereon and pleon. (In Eurygastor Vandel the break in outline is less than usual). Head with supra-antennal line present; frontal line present, incomplete or absent. Head without conspicuous lobes. Antenna 2 flagellum with 3 articles. Maxillipedal palp reduced, not much larger than endite, with only 3 articles. No dactylar organ on pereopods in Australian species. Male with penis not bifurcated distally. Typically without pleopodal lungs.