Photo of the day (12): A snail twin

Francisco Borrero sent me some pictures from his recent trip to Ecuador. This one is from a pair of snails (probably Sultana sp.) which were said to have been collected locally around Mindo, Prov. Pichincha. They were kept as pets by a young girl in the village.

Snail twin

Update: Carl C. Christensen suggested that this species may be Achatina fulica, the Giant African Snail which is an agricultural pest and an intermediate host of angiostrongyliasis, a zoonose that may cause meningitis. Carl kindly drew my attention to the fact that these snails now seem to be cultured in Ecuador and are exported as "Chinese Escargot".
CORPEI
CORPEI is a private nonprofit institution, regarded by the Government of Ecuador "as the official body of the promotion of exports and investments of Ecuador".