Belongs within: Pustulariinae.
The Cypraeovulini are a clade of cowries found around southern Africa and southern Australia whose species exhibit direct development, with egg capsules containing a single developing embryo among nurse eggs (Meyer 2003).
Cypraeovulini [Cypraeovulidae, Cypraeovulinae]
|--Cypraeovula Gray 1824M03, F11
| | i. s.: C. adamsoniiG79
| | C. algoensisM03
| | C. amphitalesM03
| | C. cohenaeM03
| | C. cruickshankiM03
| | C. fuscodentataM03
| | C. immelmaniM03
| | C. mikehartiM03
| |--+--C. connelli (Liltved 1983)M03 [=Cypraea connelliBC01]
| | `--+--C. castanea Higgins 1868M03
| | `--C. iutsui Shikama 1974M03
| `--+--C. coronata Schilder 1930M03
| |--+--*C. capensis (Gray 1828)BR17, M03 [=Cypraea capensisBR17]
| | `--C. fuscorubra Shaw 1909M03
| `--+--C. alfredensis Schilder & Schilder 1929M03
| `--C. edentula Gray 1825M03
`--+--Notoluponia Schilder 1935M03, W93
| |--*N. elegantiorW93
| `--N. pyrulataBRW98
`--Notocypraea Schilder 1925M03, F11 [incl. Guttacypraea Iredale 1935W93, Thelxinovum Iredale 1931W93]
| i. s.: N. darraghi Fehse 2010F11
| N. goudeyi Fehse 2011F11
| N. hartsmithi (Schilder 1967)M03, W93 [=Cypraea hartsmithiW93]
| N. subcarnea (Beddome 1897)F11 [=Cypraea angustata var. subcarneaB96]
|--+--*N. piperita (Gray 1825)F11, M03, F11 (see below for synonymy)
| `--N. pulicaria (Reeve 1846)M03 [=Cypraea (Notocypraea) pulicariaWG71, *Guttacypraea pulicariaW93]
| |--N. p. pulicariaW93
| `--N. p. euclia Steadman & Cotton 1946W93 [=Cypraea eucliaWG71]
`--+--N. comptonii (Gray 1847)M03, F11 (see below for synonymy)
| |--N. c. comptoniiBC01
| `--N. c. casta Schilder & Summers 1963BC01
`--+--N. angustata (Gmelin 1791)M03 (see below for synonymy)
`--N. declivis (Sowerby 1870)M03 (see below for synonymy)
Notocypraea angustata (Gmelin 1791)M03 [=Cypraea (Luponia) angustataWG71, B79; incl. C. albata Beddome 1897W93, C. (N.) molleri Iredale 1931WG71, *Thelxinovum molleriW93, C. verconis Cotton & Godfrey 1932WG71]
Notocypraea comptonii (Gray 1847)M03, F11 [=Cypraea (Notocypraea) comptoniWG71; incl. C. mayi Beddome 1897W93, C. (Notocypraea) trenberthae Trenberth 1961BC01]
Notocypraea declivis (Sowerby 1870)M03 [=Cypraea (Notocypraea) declivisWG71; incl. C. eugeniae Cate 1975W93, C. lentiginosa Coen 1949 non Gray 1825W93]
*Notocypraea piperita (Gray 1825)F11, M03, F11 [=Cypraea piperitaF11; incl. C. bicolor Gaskoin 1848W93, C. (N.) dissecta Iredale 1931WG71, W93, C. (N.) emblema Iredale 1931WG71, W93, C. declivis occidentalis Iredale 1935WG71, C. reticulifera Schilder 1924WG71, C. (Notocypraea) wilkinsi Griffiths 1962WG71, W93]
*Type species of generic name indicated
References
[B96] Beddome, C. E. 1896. Note on Cypraea angustata, Gray, var. subcarnea, Ancey. Proceedings of the Linnean Society of New South Wales 21 (3): 467–468.
[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.
[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.
[B79] Brazier, J. 1879. List of Cypraea found in Moreton Bay, Queensland. Journal of Conchology 2: 317–322.
[F11] Fehse, D. 2011. A new fossil species of Notocypraea (Mollusca: Gastropoda: Cypraeidae) from the Roe Plains of Australia. Records of the Western Australian Museum 26 (2): 179–182.
[G79] Garrett, A. 1879. Annotated catalogue of the species of Cypraeidae collected in the S. Sea islands. Journal of Conchology 2: 105–128.
[M03] Meyer, C. P. 2003. Molecular systematics of cowries (Gastropoda: Cypraeidae) and diversification patterns in the tropics. Biological Journal of the Linnean Society 79: 401–459.
[W93] Wilson, B. 1993. Australian Marine Shells vol. 1. Prosobranch Gastropods. Part One. Odyssey Publishing: Kallaroo (Western Australia).
[WG71] Wilson, B. R., & K. Gillett. 1971. Australian Shells: illustrating and describing 600 species of marine gastropods found in Australian waters. A. H. & A. W. Reed: Sydney.