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Acutichiton

Polyplacophora - Neoloricata - Acutichitonidae

Taxonomy
Acutichiton was named by Hoare et al. (1972) [Sepkoski's age data: C Serp-l P Wc Sepkoski's reference number: 277]. Its type is Acutichiton pyrmidalus.

It was assigned to Lepidopleuridae by Hoare et al. (1972) and Hoare and Sturgeon (1976); to Neoloricata by Sepkoski (2002); and to Acutichitonidae by Hoare et al. (1983), Debrock et al. (1984) and Hoare et al. (2002).

Synonymy list
YearName and author
1972Acutichiton Hoare et al. p. 679
1976Acutichiton Hoare and Sturgeon p. 845
1983Acutichiton Hoare et al.
1984Acutichiton Debrock et al.
2002Acutichiton Hoare et al. p. 257
2002Acutichiton Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
Schizocoela
phylumMollusca
RankNameAuthor
Serialia
classPolyplacophorade Blainville 1816
orderNeoloricataBergenhayn 1955
suborderLepidopleurina
familyAcutichitonidae
genusAcutichiton

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

Diagnosis
ReferenceDiagnosis
R. D. Hoare et al. 1972Small polyplacophorans with intermediate valves wider than long and nearly straight across width. Tail valve triangular in shape, keel extending entire length and lacking a mucro, gently concave or straight lateral slopes which are steeply inclined and underside of posterior portion commonly ridged parallel to valve margin by coalescence of coarse surface granules. Dorsal surface of valves sculptured by fine granules in quincunx arrangement. Head valve and girdle unknown.
R. D. Hoare and M. T. Sturgeon 1976Small polyplacophorans with head and intermediate valves wider than long, nearly straight across width, with ii valve slightly longer than iii-vii valves. Tail valve triangular in shape, keel extending entire length and lacking a mucro, nearly plane lateral slopes which are steeply inclined, underside of posterior portion smooth or with concentric growth lines. Dorsal surface of valves sculptured by fine granules in quincunx arrangement. Girdle unknown.