"Kate has been excellent with the bat for the Magicians and yesterday's match-winning knock in the Grand Final capped off a superb Super Smash campaign for her.
"Thamsyn is an athletic cricketer whose all-round skills have served the Blaze well in their T20 campaign."
Wells said the remainder of the squad had a familiar feel to it, adding he had been impressed by senior White Ferns stepping up for their Major Associations.
"We have shown faith in this group of cricketers and believe they have the skills and talent to compete against a strong English side," he said.
The White Ferns start their T20 series against England in Wellington on March 3.
This T20 series will be played as double-header fixtures alongside the Black Caps vs Australia T20 Internationals.
*Suzie Bates (shoulder) wasn't considered for selection due to injury.
White Ferns T20 squad
Sophie Devine (c) (Wellington)
Kate Ebrahim (Canterbury)
Maddy Green (Wellington)
Hayley Jensen (Otago)
Leigh Kasperek (Wellington)
Amelia Kerr (Wellington)
Jess Kerr (Wellington)
Rosemary Mair (Central Districts)
Katey Martin (wk) (Otago)
Thamsyn Newton (Wellington)
Hannah Rowe (Central Districts)
Amy Satterthwaite (vc) (Canterbury)
Lea Tahuhu (Canterbury)