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25. Propodeum with costula (a1) or transverse rugae (a2) connecting median carina to plicae.

most Pnigalio Schrank, 1802

25'. Propodeum without costula (aa1, aa2), frequently without median carina and/or plicae.

couplet 26

a1 a2
pnigalio flavipes propodeum.JPG (27005 bytes) pnigalio pallipes propodeum.JPG (27407 bytes)

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aa1

aa2
notanisomorphella propodeum.JPG (33624 bytes) sympiesis ancylae propodeum.JPG (22949 bytes)

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Image credits: a1, aa2: Miller (1970). a2: Yoshimoto (1983). aa1: Schauff, et al. (1997).