Curious Oviposition Behavior in Phyllium westwoodii (Phasmatodea: Phylliidae): Preliminary Observations.
Bottom Line: We report that in a leaf insect, Phyllium westwoodii Wood-Mason (Phasmatodea: Phylliidae), two differing apertures can be used for oviposition, the color of eggs being affected by which aperture is used.Eggs which are forcibly propelled from the internal space within the valvulae of the abdomen are brown, whereas white eggs emerge slowly from the opening between the eighth sternite and the valvulae, and are deposited close to the ventral surface of the female.This unusual oviposition system does not appear to have been previously reported in phasmatids or in other insects.
Affiliation: Shirayuri Gakuen Junior High School, 2-4-1 Kudanshita, Chiyoda-ku, Tokyo 102-0073, Japan.Show MeSH
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Mentions: The anatomy of the female genitalia was further examined (Fig. 5). The oviduct opened just above the middle of the eighth sternite, behind which the white eggs were laid. The large bursa copulatrix, which functions as a reservoir for the spermatophore, was located above the oviduct, and opened above the aperture of the oviduct. A pair of the spermathecae was attached above the bursa near its opening. A pair of slender accessory glands also arose from beneath the bursa near its opening. However, no duct was present in the internal space within the valvulae where brown eggs emerged, although a wide membranous invagination existed there.Fig. 5.
Affiliation: Shirayuri Gakuen Junior High School, 2-4-1 Kudanshita, Chiyoda-ku, Tokyo 102-0073, Japan.