Clementine Arrufatina

The Arrufatina clementine is a spontaneous mutation of the Spanish variety Clemensules.
A 100 grams clementine (6 to 7 cm diameter) very sweet, with low acidity. Harvested in November, or as early as October with the skin still green, it may already be ripe and juicy inside. The fruit is seedless unless cross-pollinated. Do not plant near other varieties of mandarin trees to avoid it.
The tree is productive and moderately vigorous, with elongated leaves and rare small thorns that disappear with age.

References:
https://idtools.org/tools/1076/index.cfm?packageID=1179&entityID=8662
https://idtools.org/tools/1076/index.cfm?packageID=1179&entityID=8290
https://citrusvariety.ucr.edu/crc4184