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1 In invertebrates whose body is divided into sections (e.g. Lophophorata and Hemichordata), the ‘trunk’ that lies behind the protosoma and mesosoma.

2 In Hymenoptera, those segments that lie behind the petiole (i.e. the abdomen from the second segment). See also gaster; mesosoma; Scorpiones.

Subjects: Zoology and Animal Sciences.

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