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Issue: Vol. 5840 No. 1: 1 Jul. 2026
Type: Monograph
Published: 2026-07-01
DOI: 10.11646/zootaxa.5840.1.1
Page range: 1-67
Abstract views: 100
PDF downloaded: 5

Annotated checklist of Recent Polyplacophora with notes on their systematics

Senckenberg Research Institute and Natural History Museum Frankfurt; Senckenberg – Leibniz Institution for Biodiversity and Earth System Research; Frankfurt; Germany; Institute of Ecology; Evolution and Diversity; Faculty of Biological Sciences; Goethe University Frankfurt; Frankfurt; Germany
Zoologische Staatssammlung München (Bavarian State Collection of Zoology); München; Germany
Zoological Institute; Russian Academy of Sciences; St. Petersburg; Russia
Institute of Ecology; Evolution and Diversity; Faculty of Biological Sciences; Goethe University Frankfurt; Frankfurt; Germany; Senckenberg Research Institute and Natural History Museum Frankfurt; Senckenberg – Leibniz Institution for Biodiversity and Earth System Research; Frankfurt; Germany
Mollusca Chiton systematics Cryptochiton Choriplax Ferreiraellidae Nuttallochitonidae Plaxiphoridae

Abstract

The systematics of chitons is based on morphological and molecular data, which resulted in a well-resolved phylogeny, but the progress in resolving some relationships at the family and genus level has been more limited, and revisionary work is ongoing. A checklist of the 1093 accepted chiton species is presented as a platform containing a list of valid Recent species with their classification. Additionally, it contains comments on systematics and taxa position, with suggestions for possible changes. This form of an annotated catalogue, in this and future editions, allows us to clearly document systematic changes and point out the areas which are still in need of revision. The checklist also includes a section on “phylogenetic systematics”, providing updates on taxa whose molecular phylogenies conflict with previous morphological treatments but whose systematics have not yet been formally clarified. We corroborate the position of Choriplax Pilsbry, 1894a and Cryptochiton von Middendorff, 1847a within Mopalioidea. A new family, Nuttallochitonidae fam. nov., is established within Cryptoplacoidea to accommodate Nuttallochiton Plate, 1899. Plaxiphora Gray, 1847a is placed in the reinstated family Plaxiphoridae Iredale, 1915, which is treated here at the superfamily rank as Plaxiphoroidea, based on the existing family-group name. The genus Icoplax Thiele, 1893 is restored to its original taxonomic rank as a separate genus. Another revision clarifies the use of the family Ferreiraellidae Dell’Angelo & Palazzi, 1991 as a substitution of earlier Abyssochitonidae Dell’Angelo & Palazzi, 1989, as there is clear evidence that Ferreiraellidae should be the accepted family name for the species in Ferreiraella.

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  420. Sirenko, B.I. (2017a) Two new species of the genus Leptochiton (Mollusca, Polyplacophora) from North-Western Pacific. Russian Journal of Marine Biology, 43 (2), 111–117. https://doi.org/10.1134/S1063074017020109
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  422. Sirenko, B. (2018a) Taiwanese deep-water chitons (Mollusca: Polyplacophora) and survey of chiton fauna of Taiwan. Zootaxa, 4422 (3), 301–344. https://doi.org/10.11646/zootaxa.4422.3.1
  423. Sirenko, B.I. (2018b) A new small chiton (Mollusca: Polyplacophora) from Guadelupe. Bulletin of the Russian Far East Malacological Society, 22 (1–2), 55–62.
  424. Sirenko, B.I. (2018c) Description of two new species of Callochiton (Mollusca: Polyplacophora) from Vietnam and Tonga. Ruthenica, 28 (1), 1–10. https://doi.org/10.35885/ruthenica.2018.28(1).1
  425. Sirenko, B.I. (2019a) Two new leptochitons (Mollusca, Polyplacophora, Leptochitonidae) from Madagascar and Mozambique. Zoologicheskii Zhurnal, 98 (8), 845–853. https://doi.org/10.1134/S0044513419080129
  426. Sirenko, B.I. (2019b) New chitons (Mollusca: Polyplacophora) of the genera Rhyssoplax, Lucilina and Onithochiton from shallow waters of Papua New Guinea. The Bulletin of the Russian Far East Malacological Society, 23 (1–2), 63–81.
  427. Sirenko, B.I. (2020a) New shelf and bathyal Philippine leptochitons (Mollusca: Polyplacophora: Lepidopleurida). Zootaxa, 4878 (3), 467–500. https://doi.org/10.11646/zootaxa.4878.3.3
  428. Sirenko, B. (2020b) New Zealand and Australian species of the genus Leptochiton (Mollusca: Polyplacophora). Zootaxa, 4851 (3), 401–449. https://doi.org/10.11646/zootaxa.4851.3.1
  429. Sirenko, B. (2020c) Leptochiton tahitiensis sp. nov. (Mollusca: Polyplacophora: Leptochitonidae) from the Society Islands, Polynesia. Zoosystematica Rossica, 29 (1), 87–92. https://doi.org/10.31610/zsr/2020.29.1.87
  430. Sirenko, B.I. (2020d) A chiton with shining shell (Mollusca: Polyplacophora) from deep waters near Papua New Guinea. Ruthenica, 30 (2), 87–91. https://doi.org/10.35885/ruthenica.2021.30(2).2
  431. Sirenko, B.I. (2020e) A second species of the genus Thermochiton Saito et Okutani, 1990 (Mollusca: Polyplacophora). Ruthenica, 30 (1), 7–12. https://doi.org/10.35885/ruthenica.2021.30(1).2
  432. Sirenko, B.I. (2020f) A replacement name for the preoccupied polyplacophoran genus Gallardoia Sirenko, 2007 (Mollusca). Ruthenica, 30 (4), 216. https://doi.org/10.35885/ruthenica.2021.30(4).5
  433. Sirenko, B. (2020g) Strictochiton schniebsae gen. et sp. nov. from Caribbean Colombia (Mollusca: Polyplacophora: Tonicellidae) with an unusual position of the nephridiopore. Archiv für Molluskenkunde, 149 (1), 103–111. https://doi.org/10.1127/arch.moll/149/103-111
  434. Sirenko, B.I. (2021a) Composition of the genus Connexochiton Kaas, 1979 (Mollusca: Polyplacophora: Ischnochitonidae). Zootaxa, 4950 (1), 83–102. https://doi.org/10.11646/Zootaxa.4950.1.4
  435. Sirenko, B. (2021b) Composition of the genus Loricella (Mollusca: Polyplacophora: Loricidae) and the description of two new species. Zootaxa, 4981 (2), 275–300. https://doi.org/10.11646/zootaxa.4981.2.4
  436. Sirenko, B.I. (2021c) Restoration of the genus Squamophora (Mollusca: Polyplacophora: Loricidae). Ruthenica, 31 (2), 51–58. https://doi.org/10.35885/ruthenica.2021.31(2).1
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How to Cite

Vončina, K., Schwabe, E., Sirenko, B.I. & Sigwart, J.D. (2026) Annotated checklist of Recent Polyplacophora with notes on their systematics. Zootaxa, 5840 (1), 1–67. https://doi.org/10.11646/zootaxa.5840.1.1