Roseaplagis rufozona

Roseaplagis rufozona is a species of sea snail in the family Trochidae, the top snails.[1][3]

Roseaplagis rufozona
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Trochidae
Genus: Roseaplagis
Species:
R. rufozona
Binomial name
Roseaplagis rufozona
(A. Adams, 1853)
Synonyms[1]
  • Cantharidus rufozona A. Adams, 1853 (original combination)[2]
  • Canthiridus rufozona A. Adams, 1853
  • Micrelenchus rufozonus (A. Adams, 1853)
  • Micrelenchus (Plumbelenchus) rufozona (A. Adams, 1853)

Description

The length of the shell varies between 4 mm and 8 mm. The small, rather thin, imperforate shell has a globosely conoidal shape. Its sculpture consists of distant rounded spiral cinguli, 5 on the penultimate, 13 on the body whorl with smooth interstices. Its colour is white or cinereous. The spiral riblets are rufous or pinkish brown.

The spire is conoidal with an acute apex. The sides are slightly convex. The small protoconch is conic with about 2 whorls. These are convex and spirally lirate, mostly eroded. The spire contains about 5 whorls, the body whorl rather large, and rounded at the periphery The base of the shell is convex. The suture is impressed. The subquadrangular aperture is iridescent and lirate within. The outer lip slightly indented, sharp, articulated with pinkish-brown, with an inner opaque white band. The white columella is vertical, with a slight tubercle in the middle, often obsolete. The inner lip has a small expansion beyond the columella, but perfectly filling up the perforation. There is a thin white callus on the parietal wall.[4]

Distribution

This marine species is endemic to and occurs off North Island, New Zealand.

References
  1. MolluscaBase eds. (2020). MolluscaBase. Roseaplagis rufozona (A. Adams, 1853). Accessed through: World Register of Marine Species at: http://marinespecies.org/aphia.php?p=taxdetails&id=876700 on 2020-07-25
  2. Adams A. (1853 ("1851")). Contributions towards a monograph of the Trochidæ, a family of gasteropodous Mollusca. Proceedings of the Zoological Society of London. 19: 150-192.
  3. "Cantharidus rufozona". Gastropods.com. Retrieved 15 January 2019.
  4. Suter H. (1913-1915), Manual of New Zealand Mollusca; Wellington, N. Z. :J. Mackay, govt. printer,1913-1915
  • Powell, A.W.B. 1979: New Zealand Mollusca: Marine, Land and Freshwater Shells. Collins, Auckland 500p (p. 56)
  • Marshall, B.A. 1998: The New Zealand Recent species of Cantharidus Montfort, 1810 and Micrelenchus Finlay, 1926 (Mollusca: Gastropoda: Trochidae). Molluscan Research 19: 107-156 (p. 140)
  • Donald K. & Spencer H. G. (2016). Phylogenetic patterns in New Zealand and temperate Australian cantharidines (Mollusca: Gastropoda: Trochidae: Cantharidinae): trans-Tasman divergences are ancient. Molecular Phylogenetics and Evolution. 100: 333-344.
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