diff --git a/doc/source/reference/arrays.rst b/doc/source/reference/arrays.rst
index 6d09e10f284af..56ea1b1f02025 100644
--- a/doc/source/reference/arrays.rst
+++ b/doc/source/reference/arrays.rst
@@ -629,11 +629,13 @@ Scalar introspection
     api.types.is_bool
     api.types.is_categorical
     api.types.is_complex
+    api.types.is_decimal
     api.types.is_float
     api.types.is_hashable
     api.types.is_integer
     api.types.is_interval
     api.types.is_number
+    api.types.is_period
     api.types.is_re
     api.types.is_re_compilable
     api.types.is_scalar