The most common one is T.ferruginosa, it seems. Most of the photos I’ve found on reliable sites, though, show “tubes” of this slime mold round-ended, rather than pointy like in this picture. Some photos on amateur sites look like mine – pointy. T.microsperma and T.bombarda are different and of no concern here. The only species I haven’t found images of is T.casparyi. I have no idea what it looks like.