HYPOTETRAGONA [H. impolita] Morey 1935,p.326 [Cytherellidae 
by Morey; Primitiidae by Agnew 19h2,p.759; 
Beyrichiacea of uncertain family by Henningsmoen 
1953,pe273] Mississippian of Missouri. 
IDIOMORPHA [I. ornata] Croneis and Gale 1939,p.28 
[Glyptopleuridae by C&G] Mississippian of Illinois. 
[Not Idiomorpha Férster 1869 = Idiomorphina 
Croneis and Gale, new name]. 
IDIOMORPHINA Croneis and Gale, new name, in Croneis June 15, 
1939b; and Croneis and Gale July 1939, for 
Idiomorpha Croneis and Gale 1938. [=Glyptopleurina 
Coryell 1928, by Cooper 1941,p.42]. 
ILIOCYPRIS Daday 1900,p.229 = Ilyocypris Brady and Norman 
1889. 
ILIOCYPRELLA [I. gibba repens (VA4vra) = Ilyocypris bradyi 
Sars 1890,p.59] Daday 1900,p.237 [= Ilyocypris 
by Ge We. Muller 1912,p.154 and by many others, 
but recognized as good by Sars 1925,p.e105, and by 
Hessland 1949,p.139,149,pl.4. Cypridae-Candoninae-- 
Synopsida by Daday] Recent, Norway-Sweden. 
ILYOBATES [1I. praetexta] Sars 1866,p.59 [Cytheridae by Sars] 
Recent, Norway [Not Ilyobates Kraatz, 1858, col. 
= Krithe Brady, Crosskey and Robertson 187]. 
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