Asaphida, the Family Trinucleidae

Nankinolithis Trilobite 145mm

£232.00 GBP

An ancient Nankinolithis trilobite measuring 145mm and member of the Order Asaphida, the Family Trinucleidae. The Nankinolithus with hundreds of cephalic holes (fenestrae) which distinguish the Trinucleids and are very obvious in this specimen to the naked eye. The pygidium segment is particularly attractive in being delightfully raised and undercut.

Nankinolithis sp. Trilobite 145mm; An ancient trilobite and member of the Order Asaphida, the Family Trinucleidae. The Nankinolithus with hundreds of cephalic holes (fenestrae) which distinguish the Trinucleids and are very obvious to the naked eye.

These pits or little holes have been a point of interest and discussion for some time, as theories swing one way and another. Thought to be how the trilobite filtered its food from the seafloor. The thinking was that the trilobite hovered over the seabed and disturbed the fine silts with its legs to send up a murky soup of particulates which then passed through the cephalic ring and those pits or holes.

That theory now accepted in some quarters as a non-starter as no pit or hole perforates completely through the cephalic rim through the cephalic ring in any specimen yet discovered. Theories also centred on a sensory function; however, the thinking is still out on just what this enigmatic bug’s pitted cephalic structures were evolved to do?

One thing is absolute, the specimen offered here is a splendid example and in the order of this trilobite is a unique quality specimen, naturally positioned on the bedrock which once formed the silts of the ancient ocean of the Devonian period - a collectors apex specimen type.

Condition report: The rust-red colour of the trilobite is due to minerals that persisted in the fossil bedding plane. The fossil specimen consists of a negative and a positive plate; each piece exhibiting the most exquisite detail. The preparators hand has sympathetically removed all the sticky matrix and ground around the positive three-dimensional carapace of the trilobite, and the pygidium segment is particularly attractive in being delightfully raised and undercut and thus highlighting the rim of pygidium very well, with a deftness of hand which has created a top-class collector piece. From approximately 400,000,000 years ago, a glimpse into prehistoric life of one of the earliest creatures dwelling on our planet.

Genus: Nankinolithis. Trilobita
Age: Palaeozoic, First Bani Group, Lower Caradoc 458,000,000 - 448,000,000 years.
Origin: Izegguirene Formation of Bou Nemrou (El Kaid Errami, East of Anti-Atlas, Morocco) North Africa.

Overall measurements.
Length: 14.5 cm
Width: 7.5 cm

Nankinolithis measurements.
Length directly: 3.1 cm
Height: 0.5 cm
Width: 3.8 cm

Weight: 0.207 g

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Free standard UK delivery - Recorded/Signed-for

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All orders outside the United Kingdom are Tracked/Signed-for for you to follow.

✓ Authenticity Guaranteed

All products include a certificate of authenticity signed by THE FOSSIL STORE.

All THE FOSSIL STORE products are authentic specimens of high quality.

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If you require a specific delivery date we can accommodate you, simply email us at info@thefossilstore.com or use our Contact Form.

Larger items need more time for delivery with custom packaging requirements to guarantee secure delivery of your item/s.

Once arranged and your order is completed at checkout The Fossil Store will assign your order to DPD Precise or an alternate courier of our choosing.

Please contact us for Next Day Delivery - availability is limited to a multitude of variables including processing times and time of enquiry.

For more information on Returns please see our Returns Policy. Some Exclusions Apply. Learn more about Thefossilstore.com delivery options and Returns Policy.

Please note, for UK orders - small products usually arrive within 3 - 5 business days.
Large products usually arrive within 4 - 10 business days.

For deliveries outside of the UK, please see our Delivery and Returns.

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