Belongs within: Vetigastropoda.
The Scissurellidae are a group of marine gastropods bearing a trochoid shell that usually has a slit present above the periphery (Zelaya & Geiger 2007).
Characters (from Zelaya & Geiger 2007): Shell 0.6–3 mm, trochoid, more or less depressed; protoconch sculpture variable; slit above periphery, open, closed or absent; radula with lateral tooth 5 enlarged by broadening.
Scissurellidae [Scissurellina, Scissurellinae]
|--SukashitrochusBR05
|--Satondella tabulata Watson 1886ZG07
|--Temnozaga parilis McLean 1989ZG07
|--Depressizona Geiger 2003 [Depressizonidae, Depressizoninae]BR05
| `--*D. exorum Geiger 2003BR17
|--Ariella Bandel 1998 non Gilbert 1941 (ICBN)ZG07
| |--*A. haliotimorpha Bandel 1998ZG07
| `--A. subantarctica (Hedley 1916) [=Schismope subantarctica, Sinezona subantarctica]ZG07
|--Incisura Hedley 1904W93
| |--*I. (Incisura) lytteltonensis (Smith 1894)P61 [=Scissurella lyttletonensisKC60]
| `--I. (Scissurona Iredale 1924)W93
| |--I. (*S.) rosea (Hedley 1904)W93, P61 [=Scissurella roseaP61]
| |--I. (S.) remota (Iredale 1924)W93
| `--I. (S.) vincentiana Cotton 1945W93
|--Sinezona Finlay 1926ZG07
| |--*S. brevis (Hedley 1904)ZG07 [=Schismope brevisZG07, Scissurella brevisP61]
| |--S. atkinsoni (Tenison Woods 1877) [incl. S. carinata Watson 1886, S. tasmanica Petterd 1879]W93
| |--S. beddomei (Petterd 1884)W93
| |--S. cingulata Costa 1861ZG07
| |--S. confusa Rolán & Luque 1994ZG07
| |--S. laevigata (Iredale 1908)P61 [=Schismope brevis laevigataF27]
| |--S. mouchezi (Vélain 1876) [=Schismope mouchezi]ZG07
| |--S. pauperata Powell 1933P61
| |--S. plicataZG07
| |--S. pulchra (Petterd 1884)W93
| |--S. redferni Rolán 1996BC01
| `--S. rimuloides Carpenter 1865ZG07
`--Scissurella d’Orbigny 1824ZG07 [incl. Schismope Jeffreys 1856W93, Woodwardia Crosse & Fischer 1861KC60]
|--*S. laevigata d’Orbigny 1824BR17
|--S. annulata Ravn 1933TTE93
|--S. atkinsoni Ten.-Woods 1877 [=Schismope atkinsoni]H09
|--‘Schismope’ beddomeiF27
|--S. bountyensis Powell 1933P61
|--‘Schismope’ caliana Dall 1919O27
|--‘Schismope’ carinataF27
|--S. chiricova Dall 1919O27
|--S. cingulata [=Schismope cingulata]P61
|--S. clathrata Strebel 1908 (see below for synonymy)ZG07
|--S. costata d’Orbigny 1824ZG07
|--S. cyprina Cotton & Godfrey 1938W93
|--S. dalli Bartsch 1903 (n. d.) [=Schizotrochus dalli]ZG07
|--S. fairchildi Powell 1933P61
|--S. georgica Davolos & Moolenbeek 2005ZG07
|--‘Schismope’ iota Finlay 1927P61
|--S. kaiserae Geiger 2006ZG07
|--S. kelseyi Dall 1905O27
|--‘Schismope’ lacuniformisF27
|--‘Schismope’ laqueus Finlay 1927P61
|--‘Schismope’ lyallensis Finlay 1927P61
|--S. malvinarum Zelaya & Geiger 2007ZG07
|--S. manawatawhia Powell 1937P61
|--S. obliqua Watson 1886 [=Incisura obliqua, Scissurona obliqua]ZG07
|--S. ornata May 1908W93
|--S. petermannensis Lamy 1910 (see below for synonymy)ZG07
|--S. prendrevillei Powell 1933P61
|--S. rimuloides (Carpenter 1865)C64, O27 [=Schismope rimuloidesO27]
|--S. staminea (Adams 1862)ZG07
|--S. stellae Flenming 1948P61
|--S. supraplicata Smith 1875 [=Schizotrochus supraplicata, Sch. supraplicatus]ZG07
`--‘Schismope’ tasmanica Petterd 1879P79
Scissurella clathrata Strebel 1908 [=Anatoma clathrata, Schizotrochus clathrata; incl. Sci. eucharista Melvill & Standen 1912, Sch. eucharista]ZG07
Scissurella petermannensis Lamy 1910 [=Schizotrochus petermanensis; incl. Sci. medioplicata Thiele 1925, Sci. timora Melvill & Standen 1912, Schizotrochus timora]ZG07
*Type species of generic name indicated
References
[BR05] Bouchet, P., & J.-P. Rocroi. 2005. Classification and nomenclator of gastropod families. Malacologia 47 (1–2): 1–397.
[BR17] Bouchet, P., J.-P. Rocroi, B. Hausdorf, A. Kaim, Y. Kano, A. Nützel, P. Parkhaev, M. Schrödl & E. E. Strong. 2017. Revised classification, nomenclator and typification of gastropod and monoplacophoran families. Malacologia 61 (1–2): 1–526.
[BC01] Boyko, C. B., & J. R. Cordeiro. 2001. Catalog of Recent type specimens in the Division of Invertebrate Zoology, American Museum of Natural History. V. Mollusca, part 2 (class Gastropoda [exclusive of Opisthobranchia and Pulmonata], with supplements to Gastropoda [Opisthobranchia], and Bivalvia). Bulletin of the American Museum of Natural History 262: 1–170.
[C64] Carpenter, P. P. 1864. Supplementary report on the present state of our knowledge with regard to the Mollusca of the west coast of North America. Report of the British Association for the Advancement of Science 33: 517–686.
[F27] Finlay, H. J. 1927. A further commentary on New Zealand molluscan systematics. Transactions and Proceedings of the New Zealand Institute 57: 320–485.
[H09] Hedley, C. 1909. The Marine Fauna of Queensland: Address by the President of Section D. Australasian Association for the Advancement of Science: Brisbane.
[KC60] Knight, J. B., L. R. Cox, A. M. Keen, R. L. Batten, E. L. Yochelson & R. Robertson. 1960. Gastropoda: systematic descriptions. 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. I169–I331. Geological Society of America, and University of Kansas Press.
[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).
[P79] Petterd, W. F. 1879. New species of Tasmanian marine shells. Journal of Conchology 2: 102–105.
[P61] Powell, A. W. B. 1961. Shells of New Zealand: An illustrated handbook 4th ed. Whitcombe and Tombs Limited: Christchurch.
[TTE93] Tracey, S., J. A. Todd & D. H. Erwin. 1993. Mollusca: Gastropoda. In: Benton, M. J. (ed.) The Fossil Record 2 pp. 131–167. Chapman & Hall: London.
[W93] Wilson, B. 1993. Australian Marine Shells vol. 1. Prosobranch Gastropods. Part One. Odyssey Publishing: Kallaroo (Western Australia).
[ZG07] Zelaya, D. G., & D. L. Geiger. 2007. Species of Scissurellidae and Anatomidae from sub-Antarctic and Antarctic waters (Gastropoda: Vetigastropoda). Malacologia 49 (2): 393–443.