Coelotrochus oppressus (Hutton 1878)

Thoristella oppressa ye una especie de moluscu gasterópodu de la familia Trochidae.

Distribución xeográfica

Alcuéntrase en Nueva Zelanda.

Referencies

• (n'Inglés) Arthur William Baden Powell, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
• Miller M & Batt G, Reef and Beach Life of New Zealand, William Collins (New Zealand) Ltd, Auckland, New Zealand 1973

Coelotrochus oppressus, common name the shouldered top shell, is a species of very small sea snail, a marine gastropod mollusc in the family Trochidae, the top snails or top shells.^[2]

Description

The length of the shell attains 5.5 mm, its diameter 6 mm. The small, somewhat solid shell has a conical shape. It is lustreless, with a false umbilicus. The sculpture of the entire surface is closely finely spirally striate. The striae of the base become coarser toward the axis. The colour of the shell is dark olive-brown or greenish, minutely tessellated all over with a slightly darker shade of the same hue. The small protoconch is conical with two slightly spirally striated whorls. The teleoconch consists of five whorls, those of the spire keeled above the middle. The body whorl is biangular. The base of the shell is rather flattened. The suture is slightly impressed. The oblique aperture is subquadrangular, iridescent and slightly lirate within. The peristome is sharp and discontinuous. The outer and basal lip are convex, with a narrow opaque margin within, which is smooth. The oblique columella is straight, in adult specimens with a few inconspicuous plications above. The umbilicus is filled with callus, leaving only a slight pit.^[3]

Distribution

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

References

• Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
• Miller M & Batt G, Reef and Beach Life of New Zealand, William Collins (New Zealand) Ltd, Auckland, New Zealand 1973
• Spencer, H.G.; Marshall, B.A.; Maxwell, P.A.; Grant-Mackie, J.A.; Stilwell, J.D.; Willan, R.C.; Campbell, H.J.; Crampton, J.S.; Henderson, R.A.; Bradshaw, M.A.; Waterhouse, J.B.; Pojeta, J. Jr (2009). Phylum Mollusca: chitons, clams, tusk shells, snails, squids, and kin, in: Gordon, D.P. (Ed.) (2009). New Zealand inventory of biodiversity: 1. Kingdom Animalia: Radiata, Lophotrochozoa, Deuterostomia. pp. 161–254

Thoristella oppressa es una especie de molusco gasterópodo de la familia Trochidae.

Distribución geográfica

Se encuentra en Nueva Zelanda

Referencias

• (en Inglés) Arthur William Baden Powell, New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
• Miller M & Batt G, Reef and Beach Life of New Zealand, William Collins (New Zealand) Ltd, Auckland, New Zealand 1973

Coelotrochus oppressus is een slakkensoort uit de familie van de Trochidae.^[1] De wetenschappelijke naam van de soort is voor het eerst geldig gepubliceerd in 1873 door Hutton als Gibbula oppressa.

Coelotrochus oppressus là một loài ốc biển rất nhỏ, marine gastropod molluscs trong họ Trochidae, họ ốc đụn hay top shells.

Hình ảnh

Chú thích

Tham khảo

• Powell A. W. B., New Zealand Mollusca, William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1
• Miller M & Batt G, Reef and Beach Life of New Zealand, William Collins (New Zealand) Ltd, Auckland, New Zealand 1973
• Phương tiện liên quan tới Coelotrochus oppressus tại Wikimedia Commons

Bài viết liên quan đến Trochidae này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn.

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