During my visit in early September I did see the Pichincha poison dart frogs (in the Guyanan part of the big hall) and Macedonian newts (in the European vivarium), but the Majorcan midwife toads were offshow.Thats indeed one of the species I missed as well as the Majorcan midwife toad and the Pinchincha dart frog but ZTL all mention them as being not seen sofar this year at Paris so maybe they are all kept behind the scenes or not kept anymore at all.
In addition, the guidebook mentions that the alpine newts are of the Bosnian subspecies (I. a. reiseri)