ɪn ɐ fjˈuː ʌvðə mˈoʊst pɹˈɪmᵻtˌɪv ˈɪnsɛkts ðɪ ˌɑːɹkiːəɡnˈæθə, ðə mˌɛɾəsˈɑːməl sˈɛɡmənts bˈɛɹ smˈɔːl, ɑːɹtˈɪkjʊlˌeɪɾᵻd ɐpˈɛndɪdʒᵻz kˈɔːld "stˈaɪli", wˌɪtʃ ɑːɹ ˈɔfən kənsˈɪdɚd təbi vˈɛstɪdʒəl.
In a few of the most primitive insects (the Archaeognatha), the metasomal segments bear small, articulated appendages called "styli", which are often considered to be vestigial.