It is distributed worldwide and is commonly found in warm, tropical regions, preferring grains, yeasts, and flours as its main diet.

[1] The beetle undergoes four developmental stages, with diet quality and larval density influencing development rates and body size.

Male-male competition for mates is fierce, with larger weapons indicating better fighting ability and increased reproductive success.

These beetles show sexual dimorphism, with males exhibiting larger body sizes and distinctive characteristics such as enlarged mandibles, widened genae, and two small horns on the vertex.

[3][4] The broadhorned flour beetle is a stored product insect found all around the world, more commonly in warm, tropical areas.

[1] The broadhorned flour beetle undergoes 4 major life stages: egg, larvae, pupa, and adult.

[2]  In the larval stages of broad-horned flour beetles, the quality of their diet influences their development rate without affecting their survival significantly.

As larval density increases, time for development from mature larvae to adults extends, affecting body size and secondary sexual traits.

[1] Moreover, individuals consuming higher-calorie diets exhibit enhanced survival and faster development, growing larger much more quickly.

[1] Although the genitalia of G. cornutus are subject to sexual selection, it is clear that the size of the aedeagus is not particularly sensitive to nutrition and is an unlikely signal of a male's underlying genetic quality.

[5] One specific type of Insulin-Like Peptide (ILP), GcorILP2, has been shown to have an impact on nutritional signaling and promoting mandible growth.

GcorILP2 positively correlates with nutrional condition and promotes the growth and development of mandibles along with increasing the size of the head and prothorax.

Sexually selected exaggerated traits such as mandible length, size of the gena, and horns on the vertex are all ornaments which confer mating advantages to males.

Juvenile hormones (JH) are involved in the regulation of moulting and metamorphosis of insects and is also associated with the exaggeration of sexually selected traits.

[9] It was found that the head size, gena, horn, and prothorax increased when exogenous JH was added to male broadhorned flour beetles, indicating that perhaps these body parts are associated with their mandibles, a sexually selected trait.

In male-male competition, the males show aggressive behavior such as interlocking horns, pushing, lifting their opponents, and biting.

[11] Males that lose fights have decreased competitive ability and may utilize other tactics to maximize their fitnes, including wandering in search of females and sneaking behavior.

Having a large weapon size often indicates greater reproductive success, as competitive males defeat their opponents and then proceed to copulate with the female.