Help Identifying Growth on Agar Plate

[gladys]

Hi,
We've grown something rather special on an agar plate that was left in the fridge for a few months. It's just agar with amp selection and it had some ecoli colonies on it which I think our new species has eaten. It's got weird tendril things coming out of the center and here's a picture:
Can anyone help me identify it?
Mucho thanks!
Gladys C Hugh

[Cat]

fungus contamination