Dear Paulo,

there are (as far as known) 3 ssp. of Salamandra salamandra.
S. s. gallaica (most of Portugal)
S. s. crespoi (southern parts)
S. s. bejarae (eastern most parts?)
With its red parts of coloration it fits most into ssp. gallaica.
On the other hand it also fits into the new ssp. alfredschmidti, which is known at the time only from Tendi- and Marea valley in southern Asturia (quite "far away" from Portugal - The same for ssp. bernardezi).
Diagnosis of alfredschmidti: no black dorsolateral stripe, but black grooves sometimes (bernardezi and fastuosa have dominant black dorsolateral stripes).
So, it depends, where you have found this Salamandra.
And, the distributiojn area of alfredschmidti is much larger as we know now.
See:
http://www.uni-bielefeld.de/biologie/.../Koehle_Steinfartz%202006.pdf
for description of S.s.alfredschmidti

Mario 

Dear Paulo and Mario,

S. s. alfredschmidti is a local, most likely non valid, variation of S. s. bernardezi with a well known distribution (far away from Portugal). Many bernardezi or "alfredschmidti" are almost completely yellow, hence the dissapearance of the dorsolateral yellow black stripes and grooves (so no value for subspecific designation!)Also, both "alfredschmidti" and bernardezi are characterised by small body size, short head, always lack red color ea.

The individual that you photographed, Paulo, is, judging from the size on the photo, slenderness, red color and the pointy snout (far to pointy for bernardezi) a variety of S. s. gallaica. It could be phenotypical variation, although there should be some areas in northeastern Portugal and northern Castilla y Leon were this pattern occurs quite often. 

Thank you everybody by the explanations
This individual was photographed in the valley of Tua river (north of Portugal) UTM 29N PF37 (10X10Km)
 

yes, very nice S. s. gallaica !