ɪnðə tˈaɪp spˈiːsiːz, dˈiː. nˈæθoːɹsti, ðə lˈæɾɚɹəl ˈɛdʒᵻz ʌvðə bɹˈæŋkɪəl plˈeɪts ænd ʌvðə sˈuːdoʊɹˌɑːstɹəm ɑːɹ sˈɛɹeɪɾᵻd.
In the type species, D. nathorsti, the lateral edges of the branchial plates and of the pseudorostrum are serrated.