Yakuchloritis
Habe 1956
Yamaguchiella
Ross & Perreault 1999
Yamatochlamys
Habe 1945
Yatinema
Asakawa & Ohbayashi 1986
Yersinia
van Loghem 1944
Yongeichthys
Whitley 1932
Yukihikous
Habu 1978