Bell-shaped Mottlegill?

Bell-shaped Mottlegill?

Observation - Bell-shaped Mottlegill?. Description: ID and names based on Roger Phillips 'Mushrooms' but really just a guess on my part. Seems to fit and growing on pony dung but not a typical time of year. Confirmation or correction much appreciated.

ID and names based on Roger Phillips 'Mushrooms' but really just a guess on my part. Seems to fit and growing on pony dung but not a typical time of year. Confirmation or correction much appreciated.