Three new species of Periploma (Bivalvia, Periplomatidae) from the Panamic Province Author Valentich-Scott, Paul Author Coan, Eugene V. text Zootaxa 2010 2673 65 68 journal article 10.5281/zenodo.276468 63d57a27-cf0e-441d-9600-8a759f96e0cb 1175-5326 276468 Periploma hendrickxi Valentich-Scott & Coan , new species Figures 2 A–F Periploma carpenteri Dall, 1896 , auctt. , non Periploma carpenteri Dall, 1896 : 20 . Description. Shell subovate to subtrigonal; inequilateral, anterior end slightly longer; both valves moderately inflated; left valve slightly fitting inside right valve; sculpture of irregular commarginal striae and broad commarginal undulations, especially near umbones; without granules or pustules; pallial sinus broad, deep, broadly rounded, extending just to beaks; chondrophore robust, small, projecting ventrally; lithodesma absent. Length to 21 mm [SBMNH]. Type material. SBMNH 83628, holotype , 1 paired valves; length, 20.1 mm; height, 15.7 mm. Paratypes : SBMNH 149600, 5 paired valves, 1 single valve; UNSM 1146205, 1 paired valves; CAS 184228, 1 paired valves; LACM 3135, 1 paired valves. Type locality. Northeast of Isla Santa Cruz, Baja California Sur, Mexico ; 25°24’N , 110°37’W ; 1,030 m . Etymology. Named in honor of Michel E. Hendrickx of the Instituto de Ciencias del Mar y Limnología, Unidad Académica Mazatlán, Sinaloa, Mexico , who has rigorously studied the deep-water benthos of the Golfo de California, and has greatly expanded our understanding of its fauna. Distribution. Only known from the type locality northeast of Isla Santa Cruz, Baja California Sur, Mexico ( 25.4°N ) [SBMNH]; 1,030 m [SBMNH]. Comparisons. Compared to Periploma planiusculum ( Figures 1 P–R), this new species is more equilateral, lacks granules and has low, broad commarginal undulations. It has been reported as P. ( Cricoploma ) carpenteri Dall, 1896 ( Figures 2 G–I), but the latter is circular in shape, has a much larger chondrophore, and weaker commarginal sculpture. Literature. Zamorano et al. (2007 , as Periploma carpenteri ).