Please help me id my prosopocoilus species

[sven]

Dear viewers,

i am a 19 year old chemistry student with entomology as hobby.
i bought a lot of beetles from a seller.
all should be (i am not 100% sure if this is true) collected in Tam Dao.

and i strugle with the identification of the prosopocoilus species.
i think most are subspecies and variations of those of Prosopocoilus astacoidus.
some photos will follow: (sorry it are links to instagram photos because i wasn't able to upload photos from my ipad to this forum)

Photo 1

Photo 2

Photo 3

Photo 4

Photo 5

Photo 6

Thanks a lot to anyone who can help me.
useful links up to direct id both will be of great help.
i don't have the right books for this job and on internet i didn't find enough information about the subspecies and their variation. Also are different sources very confusing towards eachother.

for those who are interested i have a lot of these which are too many for my collection which i can trade or sell.
but for now id is most important to me.

again thanks a lot for anyone that can help me.

greetings,
Sven

[wollastoni]

A friend of Insecterra told me that they are Prosopocoilus (Metopodontus) astacoides ssp. blanchardi Parry, 1873

[sven]

Thank you!
I am very glad with the reply.
I am amazed by how much variation there can be in one subspecies then .

[ciervo]

Sept 5, 2015 16:50:13 GMT wollastoni said:

A friend of Insecterra told me that they are Prosopocoilus (Metopodontus) astacoides ssp. blanchardi Parry, 1873

? I thought blanchardi was the Taiwanese subspecies of astacoides. You might want to verify...otherwise i can look it up.

[sven]

I also found that blanchardi comes from Taiwan. I also don't know how reliable the seller was with his collection data because he gave one broad location and month where the specimens would be collected and it was quite a lot of beetles.
For some of the specimens I can really see the similarities with blanchardi. For now they are in my collection as astacoides ssp.