Monodonta perplexa

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Monodonta perplexa
Monodonta perplexa 001.jpg
Drawing with three views of a shell of Monodonta perplexa
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Vetigastropoda
Order: Trochida
Superfamily: Trochoidea
Family: Trochidae
Genus: Monodonta
Species:
M. perplexa
Binomial name
Monodonta perplexa
Pilsbry, 1889

Monodonta perplexa is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails. [1] [2]

Contents

This genus consists of two subspecies:

Description

The height of the shell attains 8.5 mm, its diameter 10 mm. The imperforate, oblique shell has a depressed-conoid shape. It is light green, radiately flamulate above with wide zigzag dark green stripes, more narrowly striped below, encircled about the middle with a well-defined lighter zone. The entire surface is polished, and marked with numerous slightly impressed light-colored spiral lines. The acute, conic spire is very short. The sutures are more impressed than usual in this group. The five whorls are quite convex, the upper ones ruddy or purplish, the last very large, slightly compressed just below the suture, and gently descending anteriorly. The very large aperture is very oblique. The acute outer lip is thin, pearly and iridescent, and, apparently lirate within. The columella is extremely oblique. Its inner edge is concave, distinctly toothed or hooked below, bearing a shallow groove parallel with the edge, from the place of the umbilicus downward. The white columellar area is very wide. [3]

Distribution

This marine species occurs off Taiwan and Japan.

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References

  1. ↑ Bouchet, P. (2012). Monodonta perplexa Pilsbry, 1889. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=546931 on 2012-11-23
  2. ↑ Donald K.M., Kennedy M. & Spencer H.G. (2005) The phylogeny and taxonomy of austral monodontine topshells (Mollusca: Gastropoda: Trochidae), inferred from DNA sequences. Molecular Phylogenetics and Evolution 37: 474-483.
  3. ↑ Tryon (1889), Manual of Conchology XI, Academy of Natural Sciences, Philadelphia
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