Varied carpet beetle
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The varied carpet beetle is a 3 mm-long beetle belonging to the family Dermestidae, positioned in subgenus Nathrenus. They are a common species, often considered a pest of domestic houses and, particu
Dermestidae Anthrenus verbasci
Anthrenus verbasci 2
Larva of A. verbasci. Front view
Larval form of Anthrenus verbasci (4.6 mm long)
Chronobiology
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Chronobiology is a field of biology that examines timing processes, including periodic phenomena in living organisms, such as their adaptation to solar- and lunar-related rhythms. These cycles are kno
Varied carpet beetle
…natural fibers and can damage carpets, furniture, clothing, and insect collections. A. verbasci was also the first insect to be shown to have an annual behavioral rhythm and remains a classic example of circannual cycles in animals. Adult A. verbasci range in length from 1.7 to 3.5 mm (0.07 to 0.14 in). The body is…
Light enters the eye and hits the retinal pigmented epithelium (maroon). This excites rods (grey) and cones (blue/red). These cells synapse onto bipolar cells (pink), which stimulate ipRGCs (green) and RGCs (orange). Both RGCs and ipRGCs transmit information to the brain through the optic nerve. Furthermore, light can directly stimulate the ipRGCs through its melanopsin photopigment. The ipRGCs uniquely project to the superchiasmatic nucleus, allowing the organism to entrain to light-dark cycles.
Tree of life by Haeckel