Miguel Guzman died in 2006 and loyal Capitan has guarded his grave since
A week later Mr Guzman’s family went to pay their respects at his tomb and found the heartbroken hound sitting there, howling.
Since then the grieving dog has rarely left the spot at the cemetery.
Mr Guzman bought Capitan as a present for his 13-year-old son Damian in 2005 but died suddenly in March the next year.
When his family returned from the funeral Capitan was gone.
Mr Guzman’s widow Veronica was today reported as saying: “We searched for him but he had vanished. We thought he must have got run over and died.
“The following Sunday we went to the cemetery and Damian recognised his pet. Capitan came up to us, barking and wailing, as if he were crying.
“We had never taken him to the cemetery so it is a mystery how he managed to find the place.
“We went back the next Sunday and he was there again. This time, he followed us home and spent a bit of time with us, but then went back to the cemetery before it started getting dark.
“I don’t think he wanted to leave Miguel on his own at night.”
Cemetery director Hector Baccega remembers the day he first saw the dog.
He said: “He turned up here one day, all on his own, and started wandering all around the cemetery until he eventually found the tomb of his master.
“During the day he sometimes has a walk around the cemetery, but always rushes back to the grave. And every day, at six o’clock sharp, he lies down on top of the grave and stays there all night.”
Mr Baccega said staff at the cemetery in Villa Carlos Paz, central Argentina are now feeding and taking care of Capitan.
Mr Guzman’s son Damian said: “I’ve tried to bring Capitan home several times, but he always comes straight back to the cemetery. I think he’s going to be there until he dies too. He’s looking after my dad.”
Capitan follows in the tracks of Hachiko, an Akita dog which is said to have waited at a Tokyo train station for its master to return each day for nine years from May 1925, following owner Hidesaburo Ueno’s death at work.
The most famous tale of a dog’s devotion beyond the grave is Greyfriars Bobby — a Skye Terrier which allegedly spent 14 years guarding the Edinburgh grave of John Gray, dying itself in January 1872.
A statue and commemorative fountain were built at the southern end of the George IV Bridge.