Cattleya aclandiae is a species, not a hybrid. One needs to look at the whole picture to see if and at what point aclandiae enters into the parentage.
Cattleya Caudabec Candy is Caudebec x Cattleya Lulu as I gave already above
http://apps.rhs.org.uk/horticu...
Cattleya Lulu is C. Brabantiae x Penny Kuroda
http://apps.rhs.org.uk/horticu...
Cattleya Brabantiae is aclandiae x loddigesii
http://apps.rhs.org.uk/horticu...
Cattleya Caudebec is Cattleya Sophia Martin x Cattleya Penny Kuroda.
http://apps.rhs.org.uk/horticu...
Now the parentage of Penny Kuroda is easily tracked:
http://www.orchid.or.jp/orchid...
Tracking Cattleya Sophia Martin:
http://apps.rhs.org.uk/horticu...
C. guttata x C. Summer Stars
Summer Stars is:
http://apps.rhs.org.uk/horticu...
and so on, you can track backwards until you come to the primary cross.
