IN THE FIELD.
NOT IN THE GROUPS.
You won’t catch me posting in fossil groups. Want to know what I’m finding, preparing or figuring out? Check this site or watch my content. I’d rather show the work than work the crowd.
Evidence over approval
Fossils do not acquire an identity through likes, titles or group approval. An identification needs diagnostic features, provenance and a defensible comparison. A confident answer without evidence is still just a claim.
That applies to my work too. I’ll show the reasoning, admit what isn’t known, and correct the record when better evidence turns up. Honest questions are welcome. Knowing the right people is not a qualification.
Grading by anatomy
This is my Paleobeard grading standard for preservation, not a scientific classification, rarity score or species identification. A+, A, B and C describe the original preserved material using the appropriate body-plan guide.
Visibility is not completeness. Record each feature as preserved, damaged, missing or not observable. Enrolment or matrix can conceal a feature without destroying it. If the evidence is insufficient to establish the relevant grade, describe it as provisional and explain what cannot be assessed. Do not assume concealed anatomy is intact.
These guides do not automatically regrade existing records. I review actual specimens and photographs. Comparable calymenid forms require an explicit suitability check; other genera must not be forced into either rubric.
Flexicalymene and comparable calymenids
Use for Flexicalymene and other calymenid forms only when their anatomy is genuinely comparable. A superficial resemblance is not enough; do not extend this rubric to every trilobite.
- Cephalon. Record the glabella and its furrows, fixigenae (fixed cheeks), librigenae (free cheeks), eyes, cephalic border and genal angles. Do not assume that a genal angle is a long genal spine.
- Thorax. Record articulation, axial rings and thoracic pleurae, including breaks, displacement and shell loss. Separate observed segments from those concealed by enrolment or matrix.
- Pygidium. Record the pygidial axis, pleural regions, margin and its relationship to the thorax. State whether it is exposed, concealed or demonstrably missing.
- Posture and surface. Record prone, partially enrolled or enrolled posture separately from grade. Describe compression, shell retention, preparation damage, repairs and any stabilisation.
| A+ | Exceptional preservation: the cephalon, thorax and pygidium are demonstrably present and articulated. Observable glabellar features, cheeks, eyes, thoracic pleurae and pygidial margin are well preserved, with no confirmed material loss or significant distortion. Enough views or documentation must support completeness; concealed structures are not assumed intact. |
|---|---|
| A | All three main body regions are supported as present, with articulation retained. Minor superficial shell loss, small marginal chips or light compression may be present, but no major cephalic, thoracic or pygidial portion is confirmed missing. Record each defect. |
| B | The body remains substantially represented, but there is clear localised anatomical loss or damage: for example a damaged eye or cheek, broken thoracic pleurae, a damaged pygidial margin, or appreciable compression. Name the affected structures and extent rather than applying an automatic one-eye rule. |
| C | A partial or substantially disrupted specimen: a major body region is absent, or extensive loss, displacement or distortion prevents a substantially complete articulated record. Describe exactly what remains. An identified molt is documented as a molt, not automatically treated as a damaged carcass. |
Isotelus
Use for specimens identified as Isotelus, including Isotelus sp. A condition grade does not distinguish I. maximus from I. gigas or validate a species identification.
- Cephalon. Record the cephalic outline and border, glabellar area, eyes, librigenae (free cheeks) and genal angles. Describe any projections as actually preserved; do not impose a generic spine requirement.
- Thorax. Assess the axial rings and the left and right thoracic pleurae, segment articulation, displacement and any loss at their lateral ends.
- Pygidium. Assess the broad pygidial shield as a whole: axial and pleural lobes, border, outline, fractures, shell retention and missing portions. Completeness of this shield matters independently of eye preservation.
- Whole specimen. Record continuity from cephalon through thorax to pygidium, distortion and documented repair. Size alone does not increase the preservation grade.
| A+ | Exceptional preservation: complete cephalic and pygidial outlines and an articulated thorax, supported by adequate views. Observable eyes, librigenae, genal angles, thoracic pleurae and pygidial axial and pleural regions are well preserved, without confirmed material loss or significant distortion. |
|---|---|
| A | Cephalon, articulated thorax and pygidium are supported as present with their overall outlines substantially intact. Minor superficial shell loss, small marginal chips or light compression are documented; no major shield portion or thoracic section is confirmed absent. |
| B | The specimen remains substantially represented but has definite damage or loss to an eye, librigena, cephalic border, thoracic pleurae or part of the pygidium, or appreciable distortion. State the location and extent; intact eyes do not compensate for a materially incomplete pygidium. |
| C | A partial specimen, major shield loss, missing thoracic section or extensive disruption. Record the preserved cephalon, thorax and pygidium separately rather than calling the animal complete. Distinguish a supported molt interpretation from breakage or loss. |
Repair, reconstruction and associations
Disclose reattachment, stabilisation, preparation damage and restoration separately. Reconstructed material does not count as preserved anatomy and remains excluded under my sale policy. A repair note is not a substitute for describing the original material and its loss.
On a multi-specimen slab, record the condition of each individual; the best specimen does not automatically determine the grade of all the others. Note evidence for a molt or carcass rather than assuming every incomplete exoskeleton represents post-burial damage.
Anatomical terminology: S. M. Gon III, Glossary of Trilobite Terms. The letter-grade criteria are Paleobeard’s own descriptive standard, not a scale supplied by that reference.
Preparation
Preparation hours are on every listing, and they are the honest kind of number: time actually spent at the bench, not an estimate. Thirty-one hours on an Isotelus maximus is a statement about the limestone, not about the price. Air-abrasive work is the default. I do not use acid on this bed — the Arnheim is a clay and carbonate sequence, and acid on a fossiliferous limestone is a way to lose a shell you already had.
The order of work is fixed and it is the same on every specimen: clear the bed face and stop short, undercut the perimeter so the animal stands on a pedestal of matrix, and only then let the tool near it. The cephalon and the tail are the last things touched, because they are the first two to go. Full detail is in the prep notes.
Identification
Use the narrowest name supported by diagnostic specimen morphology. A Mt. Orab occurrence at genus level does not establish the species of every lot. Regional records are not automatically Flat Run records. See my identification standard and the separate confirmed and regional fauna lists.
Provenance
I’m also co-owner of Flat Run Fossils, a fossil quarry and pay-to-dig site in Mount Orab, Ohio. It’s my home quarry for the Arnheim Formation / Mount Orab specimens offered through Paleobeard. Specimens from other localities will also be available, in smaller numbers.
For material I recover at the home quarry, I can document its journey from recovery through preparation to delivery. Each listing carries its own locality, source and preparation details; material from elsewhere is identified separately, not passed off as a home-quarry find. See the bed for the Arnheim / Mount Orab geology.
What I do not do
No lot-fabrication
One animal, one lot. I do not sell "a specimen like this one" or quote a price on an animal I haven’t seen.
No silent restoration
If any part of a specimen has been reconstructed it is excluded. There is no grey area in a listing.
No artificial rarity
When a lot sells the slot closes until the bed gives up another. I do not price a common Ohio bug as though it were a closed locality, and I do not describe a bed I can dig on Tuesday as finite.
OLD ROCK.
NO NONSENSE.
