Unusual-reproduction
Guides
Micromalthus debilis
Telephone-pole Beetle
Micromalthus debilis is a small beetle native to eastern North America and the sole living representative of the family Micromalthidae, often considered a 'living fossil'. The species exhibits one of the most unusual reproductive strategies in Coleoptera: obligate paedogenesis, where reproduction occurs exclusively through parthenogenetic female larvae without production of fertile adults. Adults are vestigial, sterile, and rarely encountered in nature; they can be artificially induced through heat treatment but cannot reproduce. The species is associated with decaying wood and fungal near-red-rot habitats.