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Animalia >Arthropoda >Insecta >Coleoptera >Carabidae >Xylotrechus >

Copulation in the longhorned beetle Xylotrechus pyrrhoderus
Copulation in longhorned beetles in general has been described as follows. A male mounts a female and bends his abdomen to connect with the female¡Çs genitalia. Membrane surrounding the penis turns the other way round and the penis is extruded from male body. The male inserts the penis into female genitalia and deposits sperm. What I have observed in X. pyrrhoderus under a microscope is somewhat different. A female mounted by a male extruded tongue-like projections from the tip of her ovipositor. The ovipositor was extended and contracted repeatedly. The male connected the tip of his penis with the tip of the ovipositor. The male then pulled his abdomen upward as if to pull the ovipositor out of female genitalia. While keeping this posture, the male took a capsule of unknown substance deposited at the entrance of a sperm receptor near the tip of the ovipositor. The capsule was deposited by the female. ¡Êtranslated by Asoh¡Ë

(Data No.momo040124xp02b)

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