Call it set dressing, continuity, or whatever. I prefer to think of it as irony; After all the palaver of Jurassic Bark Fry has just shoved his dog's fossil up on a shelf and (essentially) ignored it! Note that the screen shot is of a room at Fry's place of work and thus he hasn't even bothered taking it home (i.e., Bender and his apartment) where all his 'personal' stuff is.
Seymore is getting about as much love as Wheezy (the penguin) from Toy Story 2.
I like that, though. The idea that Fry knows Seymor is dead and that's it... life is for the living, it seems people will never learn that.