Placiphorella Carpenter, 2024

(SOSA), Senckenberg Ocean Species Alliance, Brandt, Angelika, Chen, Chong, Engel, Laura, Esquete, Patricia, Horton, Tammy, Jażdżewska, Anna M., Johannsen, Nele, Kaiser, Stefanie, Kihara, Terue C., Knauber, Henry, Kniesz, Katharina, Landschoff, Jannes, Lörz, Anne-Nina, Machado, Fabrizio M., Martínez-Muñoz, Carlos A., Riehl, Torben, Serpell-Stevens, Amanda, Sigwart, Julia D., Tandberg, Anne Helene S., Tato, Ramiro, Tsuda, Miwako, Vončina, Katarzyna, Watanabe, Hiromi K., Wenz, Christian & Williams, Jason D., 2024, Ocean Species Discoveries 1 – 12 — A primer for accelerating marine invertebrate taxonomy, Biodiversity Data Journal 12, pp. e 128431-e 128431 : e128431-

Placiphorella Carpenter in Dall 1879

Type species: Placiphorella velata (Carpenter in Dall, 1879), by original designation.

Composition: Fifteen valid species. Placiphorella albitestae Is. Taki, 1954 , Placiphorella atlantica (A. E. Verrill & S. I. Smith in Verrill, 1882), Placiphorella blainvillii (Broderip in Broderip & Sowerby I, 1832), Placiphorella borealijaponica Saito & Okutani, 1989 , Placiphorella borealis Pilsbry, 1893 , Placiphorella hanselmani R. N. Clark, 1994 , Placiphorella isaotakii Saito, Fujikura & Tsuchida, 2008 , Placiphorella laurae R. N. Clark, 2019 , Placiphorella mirabilis R. N. Clark, 1994 , Placiphorella okutanii Saito, Fujikura & Tsuchida, 2008 , Placiphorella pacifica S. S. Berry, 1919 , Placiphorella rufa S. S. Berry, 1917 , Placiphorella stimpsoni (A. Gould, 1859) , Placiphorella velata (Carpenter in Dall, 1879) and Placiphorella methanophila Vončina , sp. nov.

Diagnosis: Small to medium size chitons, round to oval in outline. Valves very wide and short; lateral areas usually well defined. Articulamentum white to blue-green; head valve with 8–24 slits; intermediate valves with one slit per side; tail valve with one slit on each side (sometimes obsolete), separated by a caudal sinus. Girdle broadly extended anteriorly and bearing scaled bristles. Pallial fold modified anteriorly into numerous finger-like extensions (precephalic tentacles). Radula with tricuspid major lateral teeth. Edited after Clark (1994): 291, with modifications.