Proxiuber anteaustrale

Proxiuber anteaustrale
Temporal range:
Holotype from Auckland War Memorial Museum
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Littorinimorpha
Family: Naticidae
Genus: Proxiuber
Species:
†P. anteaustrale
Binomial name
†Proxiuber anteaustrale
Synonyms[1]
  • Proxiuber anteaustralis A. W. B. Powell, 1938

Proxiuber anteaustrale is an extinct species of sea snail, a marine gastropod mollusc in the family Naticidae.[2] Fossils of the species date to the early Pleistocene strata across New Zealand, including the Castlepoint Formation at Castlepoint, Wairarapa, New Zealand.

Description

In the original description, Powell described the species as follows:

Shell small, broadly ovate; spire very little raised, about one-fifth height of aperture. Whorls 4, including smooth blunt protoconch of 11⁄2 whorls. Sutures well marked, abutting. Surface without sculpture except for indistinct axial growth lines. Outline of whorls strongly and evenly convex, but slightly flattened below suture. Aperture semilunar. Umbilicus widely open about one-sixth width of shell, funicle undeveloped, merely defined below by a groove. Inner lip callus thickened and slightly encroaching upon the umbilicus from above.[3]

The holotype of the species has a height of 5.1 mm (0.20 in) and a diameter of 5.8 mm (0.23 in).[3]

Taxonomy

The species was first described by A.W.B. Powell in 1938, using the spelling Proxiuber anteaustralis.[3] The holotype was collected by Powell in 1924 from the Lighthouse Reef, Castlepoint, Wairarapa, New Zealand, and is held by the Auckland War Memorial Museum.[4][1]

Distribution

This extinct marine species occurs in early Pleistocene (Nukumaruan stage) strata of New Zealand dating to c. 2.40 million years ago across New Zealand,[5][6] including the Castlepoint Formation at Castlepoint, Wairarapa, New Zealand.[4]

References

  1. ^ a b "Proxiuber anteaustralis". Collections Online. Auckland War Memorial Museum. Retrieved 2 March 2026.
  2. ^ Proxiuber anteaustrale A. W. B. Powell, 1938 †. 2 March 2026. Retrieved through: World Register of Marine Species.
  3. ^ a b c Powell, A. W. B. (1938). "A Pliocene Molluscan Faunule from Castle Point". Records of the Auckland Institute and Museum. 2: 157–164. ISSN 0067-0464. JSTOR 42905977. Wikidata Q58676603. This article incorporates text from this source, which is under a CC BY 4.0 license.
  4. ^ a b Blom, Wilma M. (2025). "Annotated Catalogue of Fossil and Extant Molluscan Types in the Auckland War Memorial Museum". Bulletin of the Auckland Museum. 22. doi:10.32912/BULLETIN/22. ISSN 1176-3213. OCLC 1550165130. Wikidata Q135397912.
  5. ^ Maxwell, P.A. (2009). "Cenozoic Mollusca". In Gordon, D.P. (ed.). New Zealand Inventory of Biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Christchurch: Canterbury University Press. p. 243. ISBN 978-1-877257-72-8.
  6. ^ "marine snail, Proxiuber anteaustrale Powell, 1938 (Species)". Collections Online. Te Papa. Retrieved 2 March 2026.
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