Shallow and deep-sea chitons of the genus Leptochiton Gray, 1847 (Mollusca: Polyplacophora: Lepidopleurida) from Peruvian and Chilean waters Author Sirenko, Boris text Zootaxa 2015 4033 2 151 202 journal article 10.11646/zootaxa.4033.2.1 5f83c37c-162d-42a0-9698-f35278de98b8 1175-5326 241610 46694533-415A-4469-866E-B968502198A7 Leptochiton medinae Plate, 1899 ( Figs 5–7 ) Leptochiton medinae Plate 1899 : 82 –89; pl.5, figs. 204–206; Kaas & Van Belle 1985 : 80 –83; Sirenko 2006 : 82 ; Schwabe & Sellanes 2010 : 34 –36, Figs 1 K, 5E, F, 6, 7A, B Type . Lectotype ( ZMB /Moll-102.045), designated by Schwabe & Sellanes (2010) (not examined). Type locality. Chile , Magellan Strait, off Punta Arenas, 53º09’S 70º55’W , 15– 18 m . Material examined. Magellan Strait and Beagle Channel . RV Victor Hensen, st. 881, AGT, 53°42.0’S , 70°57.4’W , 56 m , 1 spm, 26.10.1994 , leg. K. Linse; st.884, EBS, 53°42.6’S , 70°57.5’W , 51 m , 6 spms, 26.10.1994 , leg. K. Linse; st. 949, AGT, 53°10.5’S , 70°53.5’W , 24 m , 1 spm, 30.10.1994 , leg. K. Linse; st. 972, EBS, 53°28.8’S , 70°21.9’W , 92 m , 10 spms, 0 1.11.1994 , leg. K. Linse; st. 980, EBS, 53°42.7’S , 70°50.1’W , 552 m , 1 spm, 0 1.11.1994 , leg. K. Linse; st. 1040, EBS, 54°51.0’S , 69°55.7’W , 30 m , 6 spms, 0 4.11.1994 , leg. K. Linse; st. 1247, 54°59.43’S , 69°04.64’W , 100 m , 5 spms, 19.11.1994 , leg. A. Brandt; st. 1316, AGT, 54°054’S, 70°58.3’W , 360 m , 1 spm, 24.11.1994 , leg. K. Linse; Isla de los Estados . RV Eltanin, cruise 5, st. 453, 54°27’– 54°24’S , 66°12’– 66°17’W , 3 spms, 21.01.1963 ; RV Hero , cruise 712, st. 668, 54°46.25’S , 64°02.85’W , 23 m , 3 spms, 15.05.1971 ; Atlantic ocean, Argentina . RV Hero , st. G, 42°54.0’S , 64°23’W , 20–50 m , 16 spms, 18.07.1978 . Distribution. On both sides of southern South America from Lat.42° south to Cape Horn ( Kaas & Van Belle, 1985 ; Schwabe & Sellanes, 2010 ), at depth 8– 552 m . Remarks. Schwabe & Sellanes (2010) erroneously reported an unicuspidate head of the second (major) lateral tooth of the radula in L. medinae . Kaas & Van Belle (1985) and the present data ( Fig.7 ) show a bicuspidate head of the major lateral tooth of the radula in L. medinae . The specimen figured in Schwabe & Sellanes (2010, Fig.5 , E, F) apparently shows the anterior-most part of the radula with worn denticles of the relevant teeth. I observed that the anterior most parts of the radula in several species including L. medinae , L. sykesi , L. laurae and others have unicuspidate head of the major lateral tooth because of the head was erased during process of feeding.