The seven lower planetary systems are (1) Tala, (2) Atala, (3) Vitala, (4) Nitala, (5) Talatala, (6) Mahatala and (7) Sutala. The lower planets as a whole are called Patala

Expressions researched:
"The lower planets as a whole are called Patala" |"The seven lower planetary systems are"

CC Adi-lila

The upper planetary systems are (1) Bhū, (2) Bhuvar, (3) Svar, (4) Mahar, (5) Janas, (6) Tapas and (7) Satya. The seven lower planetary systems are (1) Tala, (2) Atala, (3) Vitala, (4) Nitala, (5) Talātala, (6) Mahātala and (7) Sutala. The lower planets as a whole are called Pātāla. Among the upper planetary systems, Bhū, Bhuvar and Svar constitute Svargaloka, and the rest are called Martya.

CC Adi 5.98, Translation and Purport:

After filling half the universe with water, He made His own residence therein and manifested the fourteen worlds in the other half.

The fourteen worlds are enumerated in Śrīmad-Bhāgavatam, Second Canto, Fifth Chapter. The upper planetary systems are (1) Bhū, (2) Bhuvar, (3) Svar, (4) Mahar, (5) Janas, (6) Tapas and (7) Satya. The seven lower planetary systems are (1) Tala, (2) Atala, (3) Vitala, (4) Nitala, (5) Talātala, (6) Mahātala and (7) Sutala. The lower planets as a whole are called Pātāla. Among the upper planetary systems, Bhū, Bhuvar and Svar constitute Svargaloka, and the rest are called Martya. The entire universe is thus known as Triloka.