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Bed bugs, which reproduce solely by traumatic insemination, have evolved a pair of sperm-receptacles, known as the spermalege. It has been suggested that the spermalege reduces the direct damage to the female bed bug during traumatic insemination.
The spermalege (also known as the organ of Berlese [1]) is a special-purpose organ found in female bed bugs that appears to have evolved to mitigate the effects of traumatic insemination. [2] The spermalege has two embryologically distinct parts, known as the ectospermalege and mesospermalege. [3]
Bed bugs spend much of their time in dark, hidden locations like mattress seams, or cracks in a wall. [2] Treatment is directed towards the symptoms. [2] Eliminating bed bugs from the home is often difficult, partly because bed bugs can survive up to approximately 300 days without feeding. [6] [8] Repeated treatments of a home may be required. [2]
Traumatic insemination is, somehow, even worse than it sounds. Female bed bugs actually evolved a reproductive tract, but males don’t do anything so pedestrian as push a penis in there. Oh no.
Original - Traumatic insemination, seen here in the bedbug Cimex lectularius, is the insertion of sperm into the female by breaking through the carapace of the abdomen and injecting the sperm inside. This makes the male's reproduction more efficient; however, the threat of infection and necessity of healing decreases the female's life expectancy.
Lyctocoridae practice traumatic insemination in which the male pierces the female (using the acus of his phallus) between terga 7 and 8 on the right side of her abdomen. . The male's sperm migrate through the haemocoel or through specialized structures in the female to the ovaries, then fertilise the eggs within the vitellar
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