Order Eugregarinida Léger 1900

Family Lecudinidae Kamm 1922

Genus Lecudina Mingazzini 1891

• Lecudina pellucida (von Kölliker 1848) Mingazzini 1891– common, host – polychaeta Nereis pelagica, intestine.

Genus Lankesteria Mingazzini 1891

• Lankesteria cyrtocephala Simdyanov 1995 – type locality, host – ascidian Dendrodoa grossularia, intestine – Симдянов, 1995б.
• Lankesteria levinei Simdyanov 1995 – type locality, common, host – ascidian Ascidia callosa, intestine - Симдянов, 1995б.

Genus Ancora Labbé 1899

• Ancora sagittata (Leuckart 1861) Labbé 1899 – common, host – polychaeta Capitella capitata, intestine.

Genus Loxomorpha K.Hoshide 1988

• Loxomorpha harmothoë K.Hoshide 1988 – common, host – polychaeta Harmothoë imbricata, intestine – Симдянов, 1996.

Genus Kamptocephalus Simdyanov 1995

• Kamptocephalus mobilis Simdyanov 1995 – type locality, common, host – polychaeta Flabelligera affinis, intestine - Симдянов, 1995а.

Genus Mastigorhynchus Simdyanov 1995

• Mastigorhynchus bradae Simdyanov 1995 – type locality, host – polychaeta Brada villosa, intestine – Симдянов, 1995а.

Family Urosporidae Léger 1900

Genus Urospora Schneider 1875

• Urospora chiridotae Dogiel 1906 – common, host – sea cucumber Chiridota laevis, body cavity - own data.

Family Uradiophoridae Grassé 1953

Genus Uradiophora Mercier 1912

• Uradiophora gammari Poisson 1924 – common, host – amphipod crustacean Gammarus duebeni, intestine - own data.

rus: Отряд Eugregarinida Léger 1900