While researching the Yakuana and the club I am waiting for I found I already have a Yakuana piece. I have found some information from the British Museum collection that may throw light on the piece I have. The link contains the written information but I will add the photo. The information about the carving of a sitting shaman with elbows on knees and head in hands could explain the strange dual projections on my item. Could they be simplified shaman figures? I strongly suspect they are.
link
https://www.britishmuseum.org/collec...E_Am1973-05-12
British Museum data photo and my Yakuana piece.