OK, thanks for the clarification about the difference between parallel/crossed feet and open/crossed relationship. Why not open/closed instead of open/crossed?
________________________________ colgadas
Further development of these ideas leads to the colgada, where the two
partners lean away from each other and the woman spins on one foot
while the man steps from side to side on each side of her supporting
foot. With her free foot she can do several kinds of adornos, most
often just a long kick back that leaves her free leg extended until he
stops the spin, maybe after just a half-turn or maybe after several
complete turns.
________________________________ Nuevo? Or not?
I don't know if all these possibilities can really be included under
the umbrella of "nuevo" tango.
A few points here, Larry. I've just been reading for awhile, and being quiet, but your questions urged me to post. Firstly, it was Fabian and Gustavo who basically changed the terminology to open and crossed...open simply meaning side. We have taught together often, and, for ex., when describing the molinete, he will say, "back, open, front, open...". He never uses the term crossed in this case (or any turning movement) because he says that it leaves to question whether one means a front cross or a back cross.
Secondly, your descriptions of the ocho possibilities is quite good. Consider this in support of your post. We always teach that, in tango, ocho simply means swivel. The degree of swivel is whatever it intends to be. Draw an asterisk on the floor. If you were standing afront of the horizontal line, your descriptions of forward/under/overturned, back/over/underturned, and side ochos can be realized quite easily.
Thirdly, however, your description of colgada is limiting. Though it is developed from the ocho, as you posted, your description is only one type of colgada (mostly found in nuevo), rather than a definition of colgada as presented. Since you mentioned Fabian, you might know that he enjoys teaching the colgada from a simple arrepentida ending in salida in what is most commonly referred to as open embrace (w/o all of the side stepping and leg flying that you described which has nothing to do with colgada, really).
Lastly, all of the possiblities can be included in nuevo, but none of them need be included in, or under the umbrella of, nuevo.