A phylogeny of Iconaster and Glyphodiscus (Echinodermata, Asteroidea, Valvatida, Goniasteridae) with descriptions of four new species Author Mah, Christopher Department of Geology, University of Illinois at Urbana-Champaign, 245 NHB, 1301 W. Green, Urbana, Illinois 61801 (USA) mah @ uiuc. edu. mah@uiuc.edu text Zoosystema 2005 27 1 137 161 journal article 10.5281/zenodo.5392847 1638-9387 5392847 Glyphodiscus magnificus n. sp. ( Fig. 3 A-C) HOLOTYPE . — Palau . CRECH 146 , Mutremdiu 2, Palau , 7°16.41’N , 134°31.43’E , 162 m , 29.III.2001 , specimen wet, R = 7.5 cm , r = 2.6 cm ( CASIZ 168012 ). PARATYPES . — New Caledonia . BATHUS 1, stn CP 701, 20°57.5’S , 165°35.9’E , 302-335 m , 18.III.1993 , 1 dry specimen, R = 4.1 cm , r = 1.5 cm ( MNHN EcAs 11682). — MUSORSTOM 4, stn DW 186, 19°07’S , 163°30’E , 190 m , 19.IX.1985 , 1 dry specimen, R = 2.5 cm , r = 1.1 cm ( MNHN EcAs 11684). — MUSORSTOM 4, stn DW 185, 19°06’S , 163°29’E , 230 m , 18.IX.1985 , 7 dry specimens, R = 2.2 cm , r = 0.8 cm , R = 2.4 cm , r = 1.0 cm, R = 2.6 cm , r = 1.0 cm, R = 2.7 cm , r = 1.1 cm , R = 3.4 cm , r = 1.5 cm , R = 3.6 cm , r = 1.8 cm , R = 3.8 cm , r = 1.6 cm ( MNHN EcAs 11683). — SMIB 5, 250 m , 13.IX.1989 , rocks, 3 dry specimens, R = 2.4 cm , r = 1.0 cm, R = 2.7 cm , r = 1.1 cm , R = 2.9 cm , r = 1.2 cm ( MNHN EcAs 11692). — SMIB 5, stn DW 90, 22°19.1’S , 168°41.6’E , 310-340 m 13.IX.1989 , 1 dry specimen, R = 2.7 cm , r = 1.2 cm ( MNHN EcAs 11693). Vanuatu . MUSORSTOM 8, stn CP 970, 20°19’S , 169°53’E , 252-310 m , 21.IX.1994 , 1 dry specimen, R = 4.3 cm , r = 2.0 cm ( MNHN EcAs 11691). ETYMOLOGY. — The descriptor magnificus describes the magnificent and striking appearance of this species. DISTRIBUTION. — New Caledonia , Vanuatu , and Palau . 162- 335 m . DIAGNOSIS. — A species with interradial marginal (supero- and infero- series) plates bearing conical prominences extended from the plate. Furrow and subambulacral spines are flattened and nearly flush with the actinal surface. APOMORPHY LIST . — 14, marginal cones ( Fig. 3A ). 20, subambulacral spines present ( Fig. 3C ). 21, subambulacral spines flattened ( Fig. 3C ). DESCRIPTION Body relatively flattened. Arms elongate. Interradial arcs broad-linear. Pedicellariae absent on abactinal surface and marginal plate series. Pedicellariae present on actinal surface. Abactinal surface flat. Disk region stellate.