Neoguraleus protensus explained

Neoguraleus protensus is an extinct species of sea snail, a marine gastropod mollusk in the family Mangeliidae.^[1]

Description

Two specimens turned up, which differ from the type by the predominating spiral sculpture and very feeble axial plications. Typically there are delicate spiral threads, but in our specimens there are distinct chords present, which are crossed by flexuous longitudinal striæ. Only the upper whorls are distinctly decussate. The protoconch, consisting of two smooth whorls, is much larger than in fossil specimens from Petane, more bulbose, and with an oblique nucleus.^[2]

Distribution

This extinct marine species is endemic to New Zealand from Pliocene strata of Petane.

References

• Hutton, Frederick Wollaston.Hutton, Trans. N.Z. Inst., vol. xvii, p. 317, 1885
• Maxwell, P.A. (2009). Cenozoic Mollusca. pp 232–254 in Gordon, D.P. (ed.) New Zealand inventory of biodiversity. Volume one. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. Canterbury University Press, Christchurch.

External links

• Auckland Museum: Neoguraleus protensus

Notes and References

1. Marshall, B. (2015). Neoguraleus protensus (Hutton, 1885) †. In: MolluscaBase (2017). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=831719 on 2017-10-20
2. http://rsnz.natlib.govt.nz/volume/rsnz_38/rsnz_38_00_003460.html R. Murdoch and H. Suter, Results of Dredging on the Continental Shelf of New Zealand; Transactions and Proceedings of the Royal Society of New Zealand Volume 38, 1905