Elegant Crotalocephalina (Crotalocephalus) Trilobite Fossil

Prepared in Freestanding Mode with Hypostome Exposure

Crotalocephalina (Crotalocephalus) gibbus

Trilobites Order Phacopida, Family Cheiruridae

Geological Time: Middle Devonian

Size: Trilobite is 93 mm long (curve measure) by 39 mm wide on a 45 by 65
mm matrix

Fossil Site: Aatchana, Morocco

Fossil Code: 19092

Price: $265.00


CrotalocephalinaDescription: Elegant fossil of a member of the Order Phacopida, Family Cheiruridaewith many fine details present. The most diagnostic features of thistaxon are the sharp pleural and pygidial spines and the distinctivecephalon. The describer of this one thought it bore a resemblanceto the head of a rattlesnake (Crotalus), hence the genus name. Thespines may have aided it in staying at the surface of the soft seafloor.With the advent of a reliable source of electricity in Morocco, thequality of preparation has improved dramatically over the past fewyears. This one took a great deal of effort to prepare all spinesfree of matrix. Notice as well that additional time was devoted toremoval of the matrix from the ventral side to expose the attachmentpoints for musculature, making for a most interesting display specimen..While I used to refer to trilobites prepared in a mode similar tothis as flying, I feel a new term is warranted by the preparationnow coming into vogue. The name has changed several times, from Crotalocephalusto Crotalocephalina, and recently to Cheirurus, making it hard forthe layman to keep up. Whatever you care to call it, this one willmake a fine addition to any collection.

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Crotalocephalina


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