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Updated 13 Oct 20263 sourcesBrowse Pandipedia

An aphid can carry two generations inside her

A colony of aphids can grow without a mating event for every new generation. During their asexual phase, female pea aphids give birth to live daughters from unfertilised eggs—a process called parthenogenesis.[1]

The surprise is inside the mother. Her developing daughter embryos can already contain embryos of their own. That puts a mother, developing daughters and the beginnings of granddaughters together in one body: telescoping generations.[2]

Schematic cutaway of an adult aphid containing daughter embryos, with an enlarged daughter embryo showing a smaller early embryo inside.
Telescoping generations: a mother can contain daughter embryos that already contain the next generation.
AI-generated explanatory illustration, not a photograph. Schematic details are not to scale. · Source

Overlapping development helps colonies grow quickly when a suitable plant becomes available. The next generation may already be developing before its mother has even been born.[3]

Remastered rose-aphid illustration showing a colony on a rosebud and enlarged winged and wingless forms.
Buckley’s aphids on a rose, remastered from the historical illustration.
Historical book illustration, AI-assisted colour remaster. Colours are interpretive. · Source

The pattern depends on species and conditions. In many temperate aphids, autumn brings a sexual generation and eggs that survive winter; some populations continue asexual reproduction instead.[4][5]

Buckley noticed the rapid appearance of live young in Life and Her Children. Her comparison with budding is historical language; today we describe the process as live-bearing parthenogenesis.[6][7]

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