Trilobite - Drotops megalomanicus (Devonian, Ma'der Basin, Morocco) 11cm, Prepared

A large black Moroccan trilobite fossil, approximately 11cm long, embedded in a round grey limestone matrix with a yellow measuring tape for scale. - view 1

1/3

Estimated value

$150 - $350

Rarity

Average(4/10)

TRILOBITE - DROTOPS MEGALOMANICUS (DEVONIAN, MA'DER BASIN, MOROCCO) 11CM, PREPARED: IDENTIFICATION

This specimen is a phacopid trilobite, specifically identified as Drotops megalomanicus, characterized by its large size and well-defined schizochroal eyes. The exoskeleton displays a distinct pustulose texture across the cephalon and pleural segments. It is presented in its natural limestone matrix, which has been worked with air-scribes to reveal the fossil. The cephalon (head), thorax (body segments), and pygidium (tail) appear articulated and complete. Measuring approximately 11cm in length, this individual represents a mature adult of the species.

Compare with other fossils in the archive: Fossil Fish Positive/Negative - Vinctifer comptoni (Cretaceous, Santana Formation, Brazil), Megalodon Tooth - Otodus megalodon (Miocene to Pliocene), Marine Fossil Assemblage in Matrix (Silurian/Devonian erratic).

SCARCITY

Average55-70%

CommonLegendary

Typical antique shop fare. Requires some searching but regularly available. This is where most genuine antiques fall.

Rarity 4/10. Curiosa currently catalogues 11 fossils items at rarity 4 or higher.

Typical Characteristics

Standard antique shop items
Regularly available
Moderate collector interest

Confidence Factors

Moroccan fossils of this size are frequently augmented with resin or 'composited' from multiple individuals
Air-scribe marks in the matrix are consistent with legitimate preparation but can also hide seams
The uniform dark color may indicate the application of a surface polish or wax to enhance contrast

How does authenticity detection work?

PALEONTOLOGIST'S TAKE

Paleontology Specialist

Fossil Expert

High confidence in the taxonomic identification and origin due to distinct morphological features and matrix consistency, though moderate caution remains regarding potential industrial restoration common in Moroccan exports.

KEY EVIDENCE

1Schizochroal eye structure visible, diagnostic of the order Phacopida
2Morphology consistent with Drotops megalomanicus from the Moroccan Devonian formations
3Matrix preparation style reflects standard commercial air-abrasive techniques
411cm measurement matches the typical adult size for this species

UNCERTAINTIES

•Lack of UV light analysis to check for resin-reconstructed segments
•Potential for minor 'composite' work where pieces from different individuals are combined

WHAT WOULD IMPROVE CERTAINTY

→Conduct a UV light test to identify any fluorescent resins used for repair or reconstruction
→Examine the 'seam' between the fossil and the matrix under 10x magnification to ensure it is not a cast set into stone
→Check for the presence of natural eye facets using a jeweler's loupe

CONDITION & GRADE

Grading breakdown

Grading for trilobites is not standardized like coins; value is driven by articulation, eye facet preservation, and the percentage of restoration/reconstruction.

Condition

The specimen is largely articulated with good relief. Minor surface abrasions are visible on the glabella, and there is evidence of standard structural stabilization with cyanoacrylate (super glue) in the matrix fractures.