Trilobite - Drotops megalomanicus (Devonian, Ma'der Basin, Morocco) 11cm, Prepared
Estimated value
$150 - $350Rarity
Average(4/10)Category
FossilsEra
Middle Devonian (c. 390 Ma)Origin
MoroccoAuthenticity
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.
SCARCITY
Typical antique shop fare. Requires some searching but regularly available. This is where most genuine antiques fall.
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
PALEONTOLOGIST'S TAKE
Paleontology Specialist
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.
SPECIMEN MARKET VALUE
Updated: May 11, 2026
- Market comparables from auctions & retail
- Condition, completeness & craftsmanship
- Current collector demand & trends
- Low = quick sale, high = patient seller
For informational purposes only, not a formal appraisal.
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