Observation 217714: Amanita gioiosa S. Curreli ex S. Curreli

When: 2015-10-04

Collection location: Monte pauli , Italy [Click for map]

Who: Davide Puddu (Davide Puddu)

No specimen available

A species firstly reported under Eucalyptus but i think it is autoctonous of the mediterranean maquis ,under Quercus ,Arbutus and Cistus.
A large number of species of Amanita have found an optimal habitat under that australian plant and they are invasive in that habitat.Some exemples are A. pantherina and A. muscaria. I’ve still some doubts on tha validity of A. heterochroma , hopefully i’ll probably meet S. Curreli this week to have an opportunity to see it under the 100 years old Eucalyptus in san gavino where he first found them and to hear his explanation.
Ciao Ciao

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no ,Rod.
By: Davide Puddu (Davide Puddu)
2015-10-05 06:18:36 PDT (-0700)

Rod,i was not correcting you. i’m just telling you what is my idea about this species(A.gioiosa) and it is a widely shared idea between italian mycologists.There is the diffused idea that who described A.amici didn’t note the clamp connections and S.curreli just did the crafty person publishing it as a new species mainly on the base of this microscopic feature.
I’m just being honest.i don’t want to sound braggy.

i mean
By: Davide Puddu (Davide Puddu)
2015-10-05 06:11:23 PDT (-0700)

i cited A.heterochroma as a species found under eucalyptus and i doubt the validity of this taxa because it looks like a strange colored A.muscaria to my eyes

I misunderstood your post.
By: R. E. Tulloss (ret)
2015-10-05 06:08:04 PDT (-0700)

Thank you for correcting me.

Very best,


ok, but…
By: Davide Puddu (Davide Puddu)
2015-10-05 05:49:23 PDT (-0700)
why are you comparing those species? this one is more similar to A.junquillea , it is just an Amanita amici with a lot more clump connections. A.heterochroma looks more near to A.muscaria i think. am i wrong?
That’s a great opportunity.
By: R. E. Tulloss (ret)
2015-10-04 15:07:30 PDT (-0700)

Curreli was very kind to send me some type fragments in the past. As well as a more recent collection of heterochroma. Unfortunately, we could not successfully extract DNA from any of the dried material.

I got the impression that the spores of A. gioiosa are distinctly wider than those of heterochroma. The spore data for the two species are here:



on the technical tabs of those page.

The average Q value is higher for heterochroma.

Very best,

Rod Tulloss

Created: 2015-10-04 13:46:53 PDT (-0700)
Last modified: 2015-10-04 13:47:01 PDT (-0700)
Viewed: 42 times, last viewed: 2018-04-17 17:46:53 PDT (-0700)
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