Hanleya hanleyi, from Ávila & Sigwart (2013).

Belongs within: Aculifera.
Contains: Leptochiton, Lepidopleuridae, Ischnochitonina.

The Neoloricata are the clade of chitons, including all living species, in which the valves of the shell have a more or less hard inner, semiporcelanous layer (the articulamentum) that usually projects to overlap with adjoining valves (Smith 1960).

Characters (from Smith 1960): Valve structure consisting of periostracum, tegmentum, articulamentum, and hypostracum layers, sometimes also with mesostracum layer; articulamentum usually extending out from under tegmentum in form of insertion plates and sutural laminae.

<==Neoloricata [Lepidopleurida, Lepidopleurina]SB12
| |--Choriplax Pilsbry 1894 [incl. Microplax Adams & Angas 1864 non Fieber 1861; Choriplacidae, Choriplaxidae]S60
| | `--*C. grayi (Adams & Angas 1864) [=Microplax grayi]S60
| `--Glyptochiton deKoninck 1883S60 [GlyptochitonidaeBRW98]
| |--*G. cordifer (de Koninck 1844) [=Chiton cordifer]S60
| |--G. quadratus (Etheridge 1882)BE93
| |--G. subquadratus (Kirkby & Young 1867)BE93
| `--G. youngianus (Kirkby in Young 1865)BE93
|--Helminthochitonidae [Helminthochitoninae, Permochitonidae]BRW98
| |--Kindbladochiton arbucklensis (Smith in Smith & Toomey 1964)CRF04, BE93
| |--Euleptochiton lebescontei (Barrois 1889)BE93
| |--Permochiton Iredale & Hull 1926SB12, S60
| | `--*P. australianus Iredale & Hull 1926S60
| |--Pseudoischnochiton Ashby 1930BRW98, S60
| | `--*P. wynyardensis Ashby 1930S60
| `--Helminthochiton Salter in M’Coy 1846 [incl. Chonechiton Carpenter in Dall 1882]S60
| |--*H. griffithi Salter in M’Coy 1846S60
| |--H. aequivoca Robson 1913BE93
| |--H. concinnusS60
| `--H. priseusS60
`--+--+--Gryphochiton Gray 1847SB12, S60 [=Gryptochiton (l. c.)S60; Gryphochitonidae]
| `--Glaphurochiton Raymond 1910SB12, S60
| `--G. carbonariusVP17
| |--LepidopleuridaeSB12
| `--IschnochitoninaSB12
|--Heterochitonidae [Heterochitoninae, Ochmazochitonidae]BE93
| |--Lobarochiton anomalus (Rowley 1908)BE93
| |--Ochmazochiton comptus Hoare & Smith 1984VP17, BE93
| |--Allochiton Fucini 1912BE93, S60
| | `--*A. gemmellaroi Fucini 1912S60
| `--Heterochiton Fucini 1912S60
| |--*H. giganteus Fucini 1912S60
| `--H. vinassaiS60
|--Hemiarthrum Dall 1876BRW98, P61
| |--*H. setulosum Carpenter in Dall 1876S60
| `--H. hamiltonorum Iredale & Hull 1932P61
`--Hanleya Gray 1857SB12, S60 [=Hanleia (l. c.)S60, Hanleyia (l. c.)S60]
|--H. hanleyi (Bean in Thorpe 1844)S60 (see below for synonymy)
| |--H. h. hanleyiO27
| `--H. h. spicata Berry 1919O27
|--H. brachyplax Simone & Jardim 2009S11
|--H. multigranosa (Reuss 1860)BE93
`--H. nagelfarKC11

Neoloricata incertae sedis:
Llandeilochiton Bergenhayn 1955 [Llandeilochitonidae]S60
`--*L. ashbyi Bergenhayn 1955S60
Beloplaxus Oehlert 1881S60
`--*B. sagittalis (Sandberger 1853) [=Chiton sagittalis]S60
Lavenachiton Cotton & Godfrey 1940S60
`--*L. cliftonensis (Ashby & Cotton 1939) [=Ischnochiton (Radsiella) cliftonensis]S60
Lirachiton Ashby & Cotton 1939 [incl. Molachiton Ashby & Cotton 1939]S60
`--*L. inexpectus (Ashby & Cotton 1931) [=Acanthochiton (*Lirachiton) inexpectus]S60
Protalochiton Rochebrune 1883S60
`--*P. setlensis Rochebrune 1883S60
Pterygochiton Rochebrune 1883S60
|--*P. terquemi (Deslongchamps 1859) [=Chiton terquemi]S60
`--P. busambrensisS60
Sulcochiton Ryckholt 1862S60
`--*S. grayi Ryckholt 1862S60
Trachypleura Jaeckel 1900S60
`--*T. triadomarchica Jaeckel 1900S60
Cymatochiton Dall 1882S60 [CymatochitonidaeBE93]
|--*C. loftusianus (King 1850)S60, BE93 [=Chiton loftusianusS60]
|--C. howseanus (Kirkby 1857)BE93
`--C. kirkbyi (de Koninck 1883)BE93
Lekiskochiton [Lekiskochitonidae]BE93
|--L. cordatus (Kirkby 1859)BE93
`--L. fornicis Hoare & Smith 1984BE93
Protochiton Ashby 1925S60 [ProtochitonidaeBRW98]
`--*P. granulosus (Ashby & Torr 1901) [=Acanthochites (Notoplax) granulosus]S60
Xylochiton [Xylochitonidae]BRW98
`--X. xylophagusBRW98
Ferreiraella [Abyssochitonidae]BRW98

Hanleya hanleyi (Bean in Thorpe 1844)S60 [=Chiton hanleyiS60; incl. *H. debilis Gray 1857S60, Chiton debilisO27]

*Type species of generic name indicated


[BRW98] Beesley, P. L., G. J. B. Ross & A. Wells (eds) 1998. Fauna of Australia vol. 5. Mollusca: The Southern Synthesis. Part A. Australian Biological Resources Study: Canberra.

[BE93] Benton, M. J., & D. H. Erwin. 1993. Mollusca: Amphineura and ‘Monoplacophora’. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 125–130. Chapman & Hall: London.

[CRF04] Cherns, L., D. M. Rohr & J. Frýda. 2004. Polyplacophoran and symmetrical univalve mollusks. In: Webby, B. D., F. Paris, M. L. Droser & I. G. Percival (eds) The Great Ordovician Biodiversification Event pp. 179–183. Columbia University Press.

[KC11] Kocot, K. M., J. T. Cannon, C. Todt, M. R. Citarella, A. B. Kohn, A. Meyer, S. R. Santos, C. Schander, L. L. Moroz, B. Lieb & K. M. Halanych. 2011. Phylogenomics reveals deep molluscan relationships. Nature 477: 452–456.

[O27] Oldroyd, I. S. 1927. The Marine Shells of the West Coast of North America vol. 2 pt. 3. Stanford University Press: Stanford University (California).

[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4th ed. Whitcombe and Tombs Limited: Christchurch.

[S11] Simone, L. R. L. 2011. Phylogeny of the Caenogastropoda (Mollusca), based on comparative morphology. Arquivos de Zoologia 42 (4): 161–323.

[S60] Smith, A. G. 1960. Amphineura. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt I. Mollusca 1: Mollusca—General Features, Scaphopoda, Amphineura, Monoplacophora, Gastropoda—General Features, Archaeogastropoda and some (mainly Paleozoic) Caenogastropoda and Opisthobranchia pp. I41–I76. Geological Society of America, and University of Kansas Press.

[SB12] Sutton, M. D., D. E. G. Briggs, D. J. Siveter, D. J. Siveter & J. D. Sigwart. 2012. A Silurian armoured aplacophoran and implications for molluscan phylogeny. Nature 490: 94–97.

[VP17] Vinther, J., L. Parry, D. E. G. Briggs & P. Van Roy. 2017. Ancestral morphology of crown-group molluscs revealed by a new Ordovician stem aculiferan. Nature 542: 471–474.

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