Can anyone tell what kind of mushroom this is?

[mushandshroom]

This mushroom recently popped up unwarranted in one of my ivy pots. Its kind of neat and I wouldn't mind keeping it, but I'm concerned it could be poisonous or harmful to me, my cat, or the plant. Any information regarding the nature of this thing would he awesome! Thanks in advance!

[img]https://i43.photobucket.com/albums/e383/kingape/mush.jpg[/img]

[Dillbert]

check here:
https://americanmushrooms.com/gallery.htm

under 'gilled mushrooms'

[mushandshroom]

I didn't see anything similar to what I have

[Mini Mango!]

To me, it looks like a "Panaeolus semiovatus" family.
https://www.google.com/images?um=1&hl=en&tbs=isch%3A1&sa=1&q=Panaeolus+semiovatus&aq=f&aqi=&aql=&oq=&gs_rfai=

What do you think?