Trilobit Basseiarges (Akantharges) mellishae
Item number: Tri013
- Fossil: Trilobite, Basseiarges (Akantharges) mellishae CORBACHO & LÓPEZ-SORIANO 2013
- Formation: Middle Devonian, Eifelian, about 390 million years old
- Locality: Jorf “Red Site”, Morocco
- Size: about 1,9 cm long (Matrix: 5,5 x 5 cm)
- signed certificate of authenticity included
Description: This trilobite is a very beautiful and well preserved Basseiarges from the world famous site of Jorf near Erfoud, Morocco. The trilobite was prepared in about 12 hours of painstaking detail work from the extremely hard limestone and presents itself harmoniously on a natural matrix. Trilobites from this site are not easy to prepare because the rock does not separate from the shell and behaves like flintstone. Therefore, the trilobites have to be prepared by using air abrasives almost exclusively. Without the necessary care, unsightly cracks or flaking and “burnt” shell are inevitable. For this reason most of the trilobites offered for sale from this site are more or less damaged. This piece was glued together from several parts at the beginning of the preparation (see photos before preparation). Afterwards, the trilobite was carefully uncovered under the microscope with the help of fine air abrasives. Minor missing parts have been restored and a part of the stone was glued underneath the trilobite to support it (see pictures). Particularly noteworthy is the excellent detail preservation of the shell, especially the strongly pronounced nodes, the tuberculations of the cephalon and the eyes.
As with all my fossils, this specimen is accompanied by a signed certificate of authenticity.
The locality: Jorf has been widely known for its well-preserved trilobites for several years. The locality is located near Erfoud and stretches over several kilometres. The micritic limestone is extremely hard and splintery, flintstone-like and very difficult to prepare. The rocks of the “Red Site” are characteristically red in colour, which sometimes provides a very nice contrast to the shell. Besides Basseiarges (Akantharges), there are numerous other trilobites, such as Harpetida, Proetida, Phacopida (Austerops, Eocryphops, Struveaspis, etc.), Lichida, Odontopleurida and Scutelluinae, which have unfortunately been insufficiently researched so far.
- CORBACHO, J. & LÓPEZ-SORIANO, F. J. (2013): Two new species of Trochurinae trilobites from the Middle Devonian (Eifelian) of Southern Morocco in: Batalleria 18, p. 15-24. https://www.researchgate.net/publication/265168172_Two_new_species_of_Trochurinae_trilobites_from_the_Middle_Devonian_Eifelian_of_Southern_Morocco