ɔːlðˈoʊ ðiːz vˈiːʃˈeɪpt tˈuːbɚkəlz ɑːɹ ɐ dɪstˈɪŋkt kˌæɹɪktɚɹˈɪstɪk ʌv dɹˈɛpɐnˌæspiz, ɐ sˈɪmɪlɚ fˈiːtʃɚ hɐvbɪn əbzˈɜːvd ɪn ˈʌðɚ sˈæmoʊstˌiən ʃˈiːldz, ˈɪndᵻkˌeɪɾɪŋ ðæt ðɪs dʒˈɛnəs mˌeɪhɐv bˌɪn ðɪ ˈænsɛstɚ tə ðə dʒˈaɪənt, mˈiːɾɚ lˈɔŋ ænd wˈaɪd sˈæmoʊstˌeɪd hˈɛɾɚɹˌoʊstɹækənz ʌvðə lˈeɪt dɛvˈoʊniən.
Although these v-shaped tubercles are a distinct characteristic of Drepanaspis, a similar feature have been observed in other Psammostean shields, indicating that this genus may have been the ancestor to the giant, meter long and wide Psammosteid Heterostracans of the Late Devonian.