Lifecycle visibility

[sargasso]

In a Communications diagram (aka collaboration, aka  robustness) is there any indication of an object lifecycle?

What I mean is, a message between a controller and an entity is (in the example I am talking about) the  constructor in the target entity's classifier. I can indicate this in the message properties form by setting the Control Flow Type: Lifecycle to "New".

What I need is some way to highlight in the communications diagram that the message is the constructor.  Its pretty obvious in the Interaction (aka Sequence) diagram but not in the communications diagram.

Have I turned off an option somewhere?
Is this a UML aberation?
Should I just color the message? (no that doesn't work)
? ? ?

Bruce