Rare & Outstanding Cyprea Umbilia Eximia F. Frankstonensis 77. 1 Mm Miocene Aus
Item History and Pricing
|Product Type: Fossils||Modified Item: No|
The fabled Umbilia eximia (Sowerby, 1845) from the Middle Miocene layers of Victoria, Australia, is an extraordinary taxon with a highly variable shell morphology. As such, it has been assigned various taxonomic names, both at subspecies and species level. Of these, the name frankstonensis (which I here choose to use as a form name, but it has also been used as subspecies names of eximia and brevis, see Darragh ), refers to the morphotype that has coarser columellar teeth not... extending as far onto the columellar side. This form is a much rarer form than the 'traditional' eximia. To illustrate this distinct dentition, I have shown the specimen side by side with a traditional eximia form, where the differences are readily observable. Please note that the fossil to the right is not included in this offering.
The piece on offer is a stunningly preserved fossil - entirely natural, and free of any structural damage - in other words, close to perfection. Apart from a few rusty areas, it is alabaster white and with a high degree of natural polish. There is a slight indentation on the anterior dorsum (please see photos for more information), and some very minor erosion 'pin pricks' in places (I have yet to see a perfect eximia without any kind of erosion or blemish - there simply is no 'gem' 15-16 million year-old fossil), but overall the condition is absolutely extraordinary. An elegant, beautiful shell of great rarity, suitable for an advanced collection. Comes with full data. Happy bidding!
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Item Condition: I always try to describean item as thoroughly as possible, but I strongly urge to examine photos carefully and please ask questions if you need to know more.
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