Candelariella aurella is a species of lichen-forming fungus in the family Candelariaceae. Commonly known as "egg yolk lichen," this organism is recognized for its vibrant yellow coloration, which can stand out on the surfaces it colonizes. Here's a detailed description of Candelariella aurella:

• Appearance: The lichen appears as small, yellow, granular patches that can grow on a variety of substrates. The thallus, or body of the lichen, is crustose, meaning it is tightly attached to the surface it grows on and can often look somewhat granular or powdery.
• Habitat: Candelariella aurella commonly grows on calcareous rock, soil, or even on man-made substrates like concrete and brick walls. It is adaptable to different environmental conditions and can often be found in areas with minimal pollution.
• Distribution: This lichen is widely distributed across Europe, including the Comunidad Valenciana, where it can be observed in both urban and natural settings.
• Ecology: Candelariella aurella plays a significant role in its ecosystem. As a lichen, it contributes to the ecological community by participating in nutrient cycles. Lichens like this one can help to break down rocks into soil over time and provide food for various invertebrates.
• Conservation: Although Candelariella aurella is not considered endangered, it can be sensitive to environmental changes, particularly pollution and habitat destruction. Monitoring its presence can serve as an indicator of environmental health in the Comunidad Valenciana.

Locally, it may be referred to as "líquen yema de huevo" due to its distinctive yellow hue resembling an egg yolk. The presence of Candelariella aurella adds a touch of color to the landscapes of the region and offers an insight into the health of the local environment.