About Ignelater luminosus
Ignelater luminosus is a bioluminescent species of click beetle native to the Caribbean island of Puerto Rico. It is one of several species in the genus Ignelater that are known locally as cucubanos. Cucubanos are often confused with fireflies, which belong to the separate family Lampyridae. Unlike true fireflies, cucubanos emit light from the thorax. This species has paired light organs on its prothorax and a single light organ on the anterior surface of its abdomen. This arrangement creates the appearance of two "headlights" and one "backlight", which the beetle can turn off independently. Light pollution interferes with this species' reproduction, so it prefers undisturbed rural areas with little development. A known habitat for this species is the rural areas and outskirts of the mountain city Adjuntas, Puerto Rico. On average, Ignelater luminosus reaches 1 inch (25 mm) in length. In Puerto Rico, true fireflies are called cucullos, and some cucullo species are also native to Puerto Rico. Cucullos average half an inch in length. Both Ignelater luminosus and native Puerto Rican cucullos produce bright green light. The genome of Ignelater luminosus was sequenced in 2018.
