diff --git a/cardano-api/internal/Cardano/Api/Eras.hs b/cardano-api/internal/Cardano/Api/Eras.hs
index eefb6ef176..d4380435a5 100644
--- a/cardano-api/internal/Cardano/Api/Eras.hs
+++ b/cardano-api/internal/Cardano/Api/Eras.hs
@@ -22,8 +22,7 @@ module Cardano.Api.Eras
 
     -- * IsEon
   , Eon(..)
-  , AnyEon(..)
-  , AnyEraInEon(..)
+  , EraInEon(..)
 
   , inEonForEraMaybe
   , forEraInEon
diff --git a/cardano-api/internal/Cardano/Api/Eras/Core.hs b/cardano-api/internal/Cardano/Api/Eras/Core.hs
index d7bef7fad5..f14bd50399 100644
--- a/cardano-api/internal/Cardano/Api/Eras/Core.hs
+++ b/cardano-api/internal/Cardano/Api/Eras/Core.hs
@@ -30,8 +30,7 @@ module Cardano.Api.Eras.Core
 
     -- * IsEon
   , Eon(..)
-  , AnyEon(..)
-  , AnyEraInEon(..)
+  , EraInEon(..)
   , inEonForEraMaybe
   , forEraInEon
   , forEraInEonMaybe
@@ -163,38 +162,24 @@ maybeEon =
 -- ----------------------------------------------------------------------------
 -- Era and eon existential types
 
-data AnyEraInEon eon where
-  AnyEraInEon
+data EraInEon eon where
+  EraInEon
     :: ( Typeable era
        , Typeable (eon era)
-       , Eon eon )
+       , Eon eon
+       )
     => eon era
-    -> AnyEraInEon eon
+    -> EraInEon eon
 
 -- | Assumes that eons are singletons
-instance Show (AnyEraInEon eon) where
-  showsPrec _ (AnyEraInEon eonEra) = showsTypeRep (typeOf eonEra)
+instance Show (EraInEon eon) where
+  showsPrec _ (EraInEon eonEra) = showsTypeRep (typeOf eonEra)
 
 -- | Assumes that eons are singletons
-instance TestEquality eon => Eq (AnyEraInEon eon) where
-  AnyEraInEon era1 == AnyEraInEon era2 =
+instance TestEquality eon => Eq (EraInEon eon) where
+  EraInEon era1 == EraInEon era2 =
     isJust $ testEquality era1 era2
 
-data AnyEon where
-  AnyEon
-    :: ( Typeable era
-       , Typeable (eon era)
-       , ToCardanoEra eon
-       , IsCardanoEra era
-       , Eon eon )
-    => eon era
-    -> AnyEon
-
--- | Assumes that eons are singletons
-instance Show AnyEon where
-  showsPrec _ (AnyEon eonEra) = showsTypeRep (typeOf eonEra)
-
-
 -- ----------------------------------------------------------------------------
 -- ToCardanoEra
 
diff --git a/cardano-api/src/Cardano/Api.hs b/cardano-api/src/Cardano/Api.hs
index 743dc02d6c..5dcdbe1200 100644
--- a/cardano-api/src/Cardano/Api.hs
+++ b/cardano-api/src/Cardano/Api.hs
@@ -29,8 +29,7 @@ module Cardano.Api (
 
     -- * Eon support
     Eon(..),
-    AnyEon(..),
-    AnyEraInEon(..),
+    EraInEon(..),
 
     inEonForEraMaybe,
     forEraInEon,