Heather Knight’s side begin their Metro bank ODI series against the White Ferns at the Seat Unique Riverside tomorrow lunchtime.
Head coach Jon Lewis said: “Ryana has been a standout bowler in domestic 50-over cricket and had a good 50-over tour of New Zealand with our England A team.
“We have brought her in at this point as we have a couple of niggles in the squad. We have been really impressed with her skill level and accuracy.
“She is an exciting young talent and we look forward to having her in the squad.”