New brittle­stars (Echinodermata: Ophiuroidea) from New Zealand waters Author Mcknight, Donald G. text Zootaxa 2003 352 1 36 journal article 51250 10.5281/zenodo.156750 db5a5512-bcdb-4bc0-8221-049102f18639 1175­5326 156750 Key to species of Ophiophycis 1: Centrodorsal area poorly calcified; no dorsal or ventral armplates beyond the first, no tentacle­scales .................................................................... O. nixastrum Litvinova 1: Centrodorsal plate present, distinct, pentagonal to stellate........................................ 2 2: First lateral armplate extends to margin..................................................................... 3 2: First lateral armplate does not extend to margin........................................................ 4 3: 2 tentacle­scales; radial shields separated distally by 2 small plates; proximal spine on first lateral armplate with tip truncate..................... O. gloriensis Guille & Vadon 3: 1 tentacle­scale; radial shields separated distally by a single plate; proximal spine on first lateral armplate with tip pointed....................................... O. gracilis Mortensen 4: Radial plates spearhead­shaped, tubercular at distal end, separating the radial shields proximally; centrodorsal stellate, the angles swollen, interradial marginal plate without a spine; 7 pairs of tentacle­pores ...................................................... O. johni n.sp 4: Radial plates rounded, pentagonal or six­sided, without a distal tubercle; centrodorsal pentagonal, or with angles only slightly produced, not swollen; interradial marginal plate may have a spine; 4–6 pairs of tentacle­pores......................................... 5 5: Centrodorsal and radials pentagonal, smooth, as are other disc plates, radial shields united proximally .............................................................................. O. richardi n.sp 5: Centrodorsal rounded or slightly stellate, smooth or with a tubercle, radial plates rounded to six­sided, and may separate radial shields proximally .............................. ..................................................................................................... O . mirabilis Koehler