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aussiefossils

Everyday Shells? (Cooktown Shells)

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aussiefossils

I found this along finch bay in cooktown, Queensland, after cyclone. Are these common shells?post-14811-0-13212100-1402041313_thumb.jpgpost-14811-0-74414700-1402041225_thumb.jpgpost-14811-0-94337900-1402041182_thumb.jpgpost-14811-0-58649900-1402041044_thumb.jpg

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Al Dente

The loosely coiled tube shape shell is the internal shell of a squid-like creature called Spirula. A common name for these is "ram's horn" https://www.google.com/search?q=spirula&source=lnms&tbm=isch&sa=X&ei=CZqRU6HpJfOisQTH5oGoCA&ved=0CAYQ_AUoAQ&biw=1079&bih=827

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wolf1

Hi aussiefossiles,

I think all these shells are from recently living molluscs. In the following text, I refer to the third picture (orientated horizontally/transversal).

At the left is a specimen difficult to determine, it´s "very beach" and nearly smashed. Unfortunately, the opening (aperture) is broken off. My only (rather weak) guess is family Turridae; perhaps you can look for species of this family around Cooktown.

In the middle, it´s obviously a juvenile specimen. I think it belongs to the family Strombidae, perhaps Strombus campbelli Griffith & Pidgeon, 1834. It´s rather young and hasn´t yet broadened the opening and hasn´t yet thickened the outer lip.

The specimen at the right side is difficult, again. Unfortunately we don´t have a frontal view, so we can´t see the opening ("mouth" = aperture). Might be it belongs to the family Ranellidae (= Cymatiidae). There are some species of the genus Cymatium in your area which look rather similar.

I can´t help more, sorry..... . But perhaps it´s just a starting point and someone else can help further.

Kind regards: wolf

Edited by wolf1

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