[1] Found in southern Tajikistan, it has a squamulose (scaley) thallus forming extensive yellow-orange spots.

It is distinguished from Caloplaca citrina (in the broad sense) by its larger ascospores coupled with a narrow septum (internal partition).

arcis, known only in a sterile state, and soil-dwelling relatives C. heterospora and C. tominii, also have narrow spore septa but differ in other morphological aspects.

Soralia are typically developed at the edges of the squamules, with granular, yellow-orange soredia measuring 30–50 μm in diameter.

[2] This species has so far been observed growing on metamorphic limestone in the arid regions of southern Tajikistan at high altitudes, particularly in the Chormagzak pass, "Schirbibi" locality, at an elevation of around 1,850 m (6,070 ft).