All species possessed a long spathe-like rostrum derived from the anterior-most end of the head shield, which would have enhanced the fish's hydrodynamics and was probably also used to root out food buried beneath the substrate.
ˈɔːl spˈiːsiːz pəzˈɛst ɐ lˈɔŋ spˈeɪðlˈaɪk ɹˈɑːstɹəm dᵻɹˈaɪvd fɹʌmðɪ æntˈiəɹɪɚmˈoʊst ˈɛnd ʌvðə hˈɛd ʃˈiːld, wˌɪtʃ wʊdhɐv ɛnhˈænst ðə fˈɪʃᵻz hˌaɪdɹədaɪnˈæmɪks ænd wʌz pɹˈɑːbəbli ˈɔːlsoʊ jˈuːzd tə ɹˈuːt ˈaʊt fˈuːd bˈɛɹid bᵻnˌiːθ ðə sˈʌbstɹeɪt.