Claim

The Canjuers locality preserves the youngest Jurassic turtle fauna currently known from Europe.

Type COMPARATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 18628 · qualifiers {"population":"Thalassochelydian turtles from European Late Jurassic localities; Canjuers as the comparison locality."}

Referenced 106 times: checked 2, looked up by assistants 0, viewed 72, shared 32. A count of attention, not evidence.

Topics

Biology · 1efd24fe Ancient · 1efd24fe

Assessment

Supported

Score: 0.9054 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

2 independent evidence lineages · review checks 1 of 4 · stability MEDIUM

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:f95f077e-962c-8162-a1a2-e77a5a17f26d

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from en.wikipedia.org was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The supplied passage directly calls the Canjuers assemblage the youngest Jurassic turtle fauna known from Europe. weight 1.800000 evidence

Suppressed as dependent: The abstract describes the Canjuers thalassochelydian assemblage as the youngest Jurassic turtle fauna known from Europe.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Unresolved.

Hide calculation

0.9054 under ledger-default@0.3.0 at snapshot 27745 · state Supported · Review checks: 1 of 4 · stability MEDIUM · 3 sources, 2 independent lineages

Model ledger-default@0.3.0 (the default model, not the answer) · snapshot 27745 · trace sha256:cbd279c5766d9a7dfa557fccbbf3726640cb4b4ed92e5ce577afbae06dc9ff15

Last changed at entry seq 24948; nothing logged since has borne on this claim.

How the number was reached

Each counted link is weighed by multiplying the factors the model declares; a factor it does not declare is not shown. Every factor name below links to what that number means.

Link	Working	Weight	Counted as
60d0f4ee support	relevance MODERATE 0.6 × observation DIRECT_TEXT 0.9 × interpretation 1 step, 1 − 0.15 × 1 0.850000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.459000	0.459000
8853f551 support	relevance DIRECT 2.0 × observation DIRECT_TEXT 0.9 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	1.800000	1.800000
f8377385 support	relevance DIRECT 2.0 × observation EXPERT_ANALYSIS 0.3 × interpretation 0 steps, 1 − 0.15 × 0 1.000000 × authenticity UNVERIFIED 1.0 × extraction UNVERIFIED 1.0 × provenance INDEPENDENT 1.0 × edition NAMED_OR_UNRELATED 1	0.600000	0.000000 (dependent strongest only, kept 8853f551)

prior 0.50 → log-odds 0.000000 + 2.259000 (the counted weights) = 2.259000 → probability 0.9054

Under neighbouring settings of the same model: 0.8294 to 0.9496, a spread of 0.1202.

Half-even rounding, six places for weights and four for the probability. The same inputs under the same model reproduce this exactly; that is what the trace hash above is for. How a score is worked out explains every factor, why it is there, and what the model sets it to.

Your view

Registered views

Nobody has registered a view yet.

Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“The Canjuers locality preserves the youngest Jurassic turtle fauna currently known from Europe.” · 1 claim · 29 September 2026
“A revision of Canjuers fossil turtles recognized two specimens as a new thalassochelydian species, Caesaria templaria, and identified the locality as...” · 2 claims · 29 September 2026

Evidence for

The abstract describes the Canjuers thalassochelydian assemblage as the youngest Jurassic turtle fauna known from Europe.

From A revision of the fossil turtles of the Late Jurassic locality of Canjuers, France, and description of a new thalassochelydian species Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The secondary taxonomic page places Caesaria templaria in the Late Jurassic Canjuers Lagerstätte and identifies it as a 2026-described thalassochelydian turtle.

From Caesaria templaria Read 2026-09-29 Relevance MODERATE Steps 1 Counted

Secondary taxonomic summary; its information may derive from the primary paper and does not independently establish the 'youngest European Jurassic fauna' comparison.
The supplied passage directly calls the Canjuers assemblage the youngest Jurassic turtle fauna known from Europe.

From A revision of the fossil turtles of the Late Jurassic locality of Canjuers, France, and description of a new thalassochelydian species Read 2026-09-29 Relevance DIRECT Steps 0 Counted

The excerpt states the comparative superlative directly.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
e987dee9		8853f551

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	8853f551, f8377385

Summary

Supported. The main support is: The secondary taxonomic page places Caesaria templaria in the Late Jurassic Canjuers Lagerstätte and identifies it as a 2026-described thalassochelydian turtle. 43b38a7b

1 further item repeats the same origin and is not independent evidence. e987dee9

A search for evidence in the opposing direction found none. 5d70a546

Review checks: 1 of 4. coverage:f95f077e-962c-8162-a1a2-e77a5a17f26d

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
18628	APPENDED
18629	ACCEPT	AUTOMATIC_AFTER_VALIDATION
18638	LINK_EVIDENCE	by 1efd24fe (accepted)
18676	LINK_EVIDENCE	by 1efd24fe (accepted)
22238	TASK_RESULT	by 1efd24fe (accepted)

Score trace

{
  "claim": "f95f077e-962c-8162-a1a2-e77a5a17f26d",
  "links": [
    {
      "link": "078e313a-2f50-8926-9841-35b960d0f4ee",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "2c9d5c40-6366-8270-af4e-eb0d43b38a7b",
      "direction": "SUPPORT",
      "magnitude": "0.459000",
      "relevance": "MODERATE",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "WEBSITE",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.459000",
      "interpretive_steps": 1
    },
    {
      "link": "bff4b63b-0be8-8b32-8526-eeae8853f551",
      "group": null,
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "383f3ecc-032e-883f-994a-32691331beb5",
      "direction": "SUPPORT",
      "magnitude": "1.800000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "DIRECT_TEXT",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "1.800000",
      "interpretive_steps": 0
    },
    {
      "kept": "bff4b63b-0be8-8b32-8526-eeae8853f551",
      "link": "c7c2d866-7a74-86c0-aa68-f2ebf8377385",
      "group": null,
      "reason": "dependent_strongest_only",
      "edition": "NAMED_OR_UNRELATED",
      "evidence": "1bb84aa8-d446-8a9d-b358-5611e987dee9",
      "direction": "SUPPORT",
      "magnitude": "0.600000",
      "relevance": "DIRECT",
      "extraction": "UNVERIFIED",
      "provenance": "INDEPENDENT",
      "observation": "EXPERT_ANALYSIS",
      "source_type": "PRIMARY_TEXT",
      "authenticity": "UNVERIFIED",
      "audit_confirmed": false,
      "effective_weight": "0.000000",
      "interpretive_steps": 0
    }
  ],
  "model": "ledger-default@0.3.0",
  "prior": "0.50",
  "variants": {
    "spread": "0.1202",
    "permissive": "0.9496",
    "conservative": "0.8294"
  },
  "code_hash": "sha256:c61a6fdf35a754a0d7e958df149036a083c0eaeb7d2d2e52704ec32b0c36def7",
  "contested": false,
  "stability": "MEDIUM",
  "claim_type": "COMPARATIVE",
  "config_hash": "sha256:86768038080b8ab5233f1e4b7aba10af05b5bb44caa432095150b90e81209809",
  "probability": "0.9054",
  "provisional": true,
  "evidence_sum": "2.259000",
  "snapshot_seq": 24948,
  "prior_log_odds": "0.000000",
  "support_groups": 2,
  "model_dependent": false,
  "review_coverage": "0.25",
  "truth_evaluable": true,
  "assessment_state": "SUPPORTED",
  "review_checklist": {
    "qualifiers_reviewed": {
      "by": [],
      "ok": false
    },
    "opposing_search_done": {
      "by": [],
      "ok": false
    },
    "independence_reviewed": {
      "by": [],
      "ok": false
    },
    "primary_source_reviewed": {
      "by": [
        "bff4b63b-0be8-8b32-8526-eeae8853f551",
        "c7c2d866-7a74-86c0-aa68-f2ebf8377385"
      ],
      "ok": true
    }
  },
  "contradict_groups": 0,
  "rounding_boundary": false,
  "posterior_log_odds": "2.259000",
  "not_applicable_reason": null,
  "independence_unreviewed": 3
}