Question: Yetto was a ground level stopping place during the passenger transport days of this line, was in what is now the suburb of Morphett Vale, a southern suburb of Adelaide, South Australia in the City of what?

Context paragraphs:
Morphett Vale, South Australia: Morphett Vale is a southern suburb of Adelaide, South Australia in the City of Onkaparinga.  It is the largest suburb in the state, with a population of more than 23,000 and an area of 12.76 km², followed by Paralowie with nearly 10,000 fewer residents.  There are approximately 1,000 businesses in Morphett Vale.

Patpa railway station: Patpa is a closed railway station in Adelaide, South Australia.  It was a ground level stopping place during the passenger transport days of this line, and a 1965 reference mentioned that it was no longer used at that date.

Taringa railway station, South Australia: Taringa railway station was a ground level stopping place during the passenger transport days of the Willunga railway line which opened in 1915, and a 1965 reference mentioned that it was no longer used at that date.

McLaren Vale railway station: McLaren Vale is a closed railway station in Adelaide, South Australia.  It was a ground level stopping place during the passenger transport days of this line and was an unattended crossing station after 1957.  The station yard was noted for its impressive avenue of giant pine trees.

Happy Valley railway station: Happy Valley is a closed railway station in Adelaide, South Australia.  It was a ground level stopping place during the passenger transport days of this line, and a 1965 reference mentioned that it was no longer used at that date.

Yetto railway station: Yetto was a ground level stopping place during the passenger transport days of this line, and a 1965 reference mentioned that it was no longer used at that date.  It was in what is now the suburb of Morphett Vale

Coorara railway station: Coorara is a closed railway station in Adelaide, South Australia.  It was a ground level stopping place during the passenger transport days of this line, and a 1965 reference mentioned that it was no longer used at that date.

Pimpala railway station: Pimpala is a closed railway station in Adelaide, South Australia.  It was a ground level stopping place during the passenger transport days of this line, and a 1965 reference mentioned that it was no longer used at that date.

Pikkara railway station: Pikkara is a closed railway station in Adelaide, South Australia.  It was a ground level stopping place during the passenger transport days of this line, and a 1965 reference mentioned that it was no longer used at that date.  It was located just north of McMurtrie Road on the southeastern outskirts of McLaren Vale.

Moana railway station: Moana is a closed railway station in Adelaide, South Australia.  It was a ground level stopping place during the passenger transport days of this line, and a 1965 reference mentioned that it was no longer used at that date.

Supporting paragraphs: Yetto railway station Morphett Vale, South Australia
Answer: Onkaparinga