LYONSIIDAE
Especes : 9 Taxa : 9 (maj:18-01-06)

LYONSIINAE
Lyonsia
Lyonsia californica Conrad , ( 22 28 ) Californie,
Lyonsia floridana Conrad 1849, ( 18 ) Floride,
Lyonsia hyalina Conrad , ( 15 ) Canada E & Caroline,
Lyonsia norvegica (Chemnitz 1788), ( 20 ) Mediterranee,
Lyonsia patagonica Orbigny , ( 15 18 ) Uruguay,
Lyonsia ventricosa Gould 1861, ( 15 ) Japon,

Agriodesma
Agriodesma navicula (Adams & Reeve 1850), ( 30 ) Japon,

Entodesma
Entodesma beana (Orbigny 1842), ( 25 ) Bresil & U.S.A S.E.,
Entodesma saxicolum Baird 1863, ( 100 ) Alaska & Californie,