Hello dear Stefan Ziemendorff  the specimen of pictures is not a spider, this specimen is a harvestmen an arachnid that belongs to Opiliones Order.

Best regards

Cristian Martínez

Hello dear Stefan Ziemendorff  the specimen of pictures is not a spider, this specimen is a harvestmen an arachnid that belongs to Opiliones Order.

Best regards

Cristian Martínez

Hello;

Order Opiliones ; Family Travuniidae

https://naharvestmen.com/laniatores/superfamily-travunioidea/

http://bugguide.net/node/view/1241584

After carefully comparing photos and geographic aspects - i think it is maybe a species from family Stygnidae - any opinions ? 

Hi Stefan,

I do not think that it is a species from family Stygnidae. I think it is from family Travuniidae as Djillali said.

Please find the attached link for an important article. Hope that it is of value for you.

Regards,

Wafaa

https://www.google.com.eg/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwj18KTB5trOAhWEmBoKHfqkCf8QjB0IBg&url=http%3A%2F%2Fzookeys.pensoft.net%2Farticles.php%3Fid%3D6274%26display_type%3Delement%26element_type%3D7%26element_id%3D0%26element_name%3DCryptomaster&psig=AFQjCNH9okyyud2Nm0uJGwIIqDSjmArsRg&ust=1472153436965530

Dear Wafaa, dear Djillali: But is it true, that  there are no Travuniidae at all in Southamerica ? That is my doubt.

 Hi Stefan,

There are no Travuniidae in South America. 

Could be one Stygnidae or one Cosmetidae.  

I suggest you to contact Adriano Kury ([email protected]) or Abel Perez Gonzalez ([email protected]). Both are specialist and can give you a more precise answer.

Cheers,

Camilo

Hello Stephan

Kingdom: Animalia

Phylum: Arthropoda

Class: Arachnida

Order: Araneae

Family: Leptonetidae

Genus: Tayshaneta