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Erbenochile Erbeni | Odontopleuridae

Erbenochile Erbeni Trilobite 98mm

£1,992.00 GBP

Let's start with these amazing turreted eyes of the Erbenochile erbeni, the only eyes like them in the trilobite schizochroal eye group, that's mainly down to the eyeshades, we'll come back to those shortly. Firstly the closely packed lenses show hardly any sclera (fibrous membrane of the eye), between them. The dorsoventral files (vertical rows of the dorsal and ventral surfaces), of 18 lenses rise up and down the 7mm cylindrical tower, in around 34 rows, with over 500 lenses on each eye column. These columnar towers terminate at the top with a palpebral lobe (overhanging flange), the Erbenochile's most striking feature, described (Fortey and Chatterton 2003), as an eyeshade. Experiments were conducted with over-lighting showing how the surface of the lenses would be shaded from light penetrating through the water surface to a shallow sea bottom. The trilobite it is thought, would lie in wait buried just beneath the surface of the sandy bottom with only its turreted eyes exposed (levi-setti 2014)

This most remarkable example has other features which lift it above its relatives. The carapace (exoskeleton), is in an excellent state of preservation. Short spines run along each genal spine (cheek spines), over each leading or upper edges. Each pleural furrow (body segment), also has spinosity. From the occipital lobe through the axial lobe (central raised part), the axial pleura each feature one large fine spine, which dominate the exoskeleton along with smaller spines or pustules. The whole is well preserved through to the pygidium (tail section or shield), with its well defined raised pleural furrows. The pleura of the thorax (body) terminate in stout spines, these runs through to the pygidium where similarly, spines protrude creating the appearance of a fine frill surrounding the carapace.

The overall work of the preparatory is sensational in this example, the spinosity is great, a multitude of fine spines on the genal spines and the pleural furrows and upper pleura edges creates a comb effect on the author, the temptation to touch these fine comb-like protruding spines is very tempting, but the apprehension of removing them stronger!

Erbenochile erbeni Trilobite 98mm is the overall longest dimension of the matrix block which surmounts this impressive fossil arthropod, A member of the prehistoric marine invertebrates. The most unusual schizochroal eyes in the trilobite group characterise this genus type. A fine specimen, displaying a rare spinosity best viewed under a magnifying lens. Read our full description below and to read more about the Class Trilobita, follow this link to discover another world.

SPEC

Genus: Erbenochile erbeni. Family; Odontopleuridae.
Age: Palaeozoic, Devonian, Emsian stage, 408 to 393 million years.
Origin: Bou Tiskaouine, Hamar l”Aghdad, Taharajat, Oufaten, Djebel Issoumour.

SIZE

H: 7 CM
W: 2 CM
D: 1.3 CM

OVERALL

H: 3.2 CM
W: 8.3 CM
D: 9.8 CM
KG: 0.319

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100 trees helps restore CO₂ emissions for a return flight from London to San Francisco, totalling 8619.80 KM, equivalent to 0.15119 KG per KM of CO₂ per person - total flight emissions for one person is 1303.23 KG [1.3 tonnes]. With an average capacity of 575 persons per flight totalling 74,9225 KG [774 tonnes] of CO₂ based on UK government (GGR) greenhouse gas reports.



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