Phylogenetic position and morphological descriptions of Chiton species from the south-eastern Pacific Author Ibáñez, Christian M Author Pardo-Gandarillas, M Cecilia Author Méndez, Marco A Author Sellanes, Javier Author Sigwart, Julia D Author Sirenko, Boris text Zoological Journal of the Linnean Society 2021 2021-03-01 191 3 695 719 https://academic.oup.com/zoolinnean/article/191/3/695/5870858 journal article 10.1093/zoolinnean/zlaa067 0024-4082 5300353 CHITON LINNAEUS, 1758 Type species: Chiton tuberculatus Gray, 1828 , by subsequent designation, Dall (1919: 297) . Diagnosis: Large, oval organisms (> 30 mm total length). Valves flattened to elevated and carinate, with pectinated insertions. Tegmental structure variable, subtegmentum poorly to highly developed. Girdle scales variable in shape and size, smooth or with striations, pustules or granules. Denticle cap of major lateral tooth of radula variable, blunt or somewhat elongate or round; angle of denticle cap greater than 90° from axis of the tooth itself; distal edge of centrolateral tooth perpendicular to longitudinal axis of animal.