古生物龟化石

拍卖审核资料：起拍价200万元的收藏价值与升值空间解析

一、藏品基本信息

名称：侏罗纪蛇颈龟化石
年代：中侏罗世至晚侏罗世（约1.8亿-1.4亿年前）
产地：中国重庆江北地区
地质背景：发现于红色砂岩与含泥质灰岩层，与恐龙骨骼形成共生关系，属四川盆地侏罗系自流井组大安寨段标准指示化石。
标本特征：

• 完整龟壳轮廓，背甲直径约25cm，保留黑色钙质裙边及放射状辐射纹路； • 缺失头尾及四肢，但部分标本通过显微CT技术重建内部骨骼结构； • 岩质与周边地层差异显著，具有典型沉积环境特征。

二、收藏价值解析

1. 科学价值：古生物演化的“活教材”

• 地层划分：作为四川盆地侏罗纪地层划分的生物依据，其辐射纹路与欧洲同期化石对比显示独立演化路径，为古地理环境复原提供关键证据。 • 物种演化：揭示蛇颈龟类从缺乏中腹甲到成龟具备完整甲壳的形态分化特征，支持中国科学院提出的龟类早期演化新假说。 • 共生关系：与恐龙骨骼、双壳类化石共同构成古生物群落，反映侏罗纪时期湖泊河流密布的生态环境。

2. 历史价值：中国古生物研究的里程碑

• 发现历史：1950年成渝铁路建设期间，新中国首代古生物学家陈重枢采集到首批蛇颈龟化石，现存于重庆自然博物馆，成为西南地区脊椎动物化石研究起点。 • 学术关联：与四川威远晚侏罗世龟化石形成对比，显示盆地内部物种多样性；法国国立自然博物馆专家参与背甲纹路研究，建立欧亚大陆化石对比体系。

3. 市场价值：化石收藏的“硬通货”

• 拍卖纪录： 2017年龟板化石成交价460万港元； • 2018年贝壳化石成交价3300万港元； • 2019年贵州龙化石成交价35.2万新加坡元。

价格区间：据中国古玩网数据，龟化石市场价格在200万至700万元之间，本次起拍价200万元属合理区间。
稀缺性：重庆地区侏罗纪龟化石仅发现于江北、合川等少数地点，完整标本存世量稀少。

三、升值空间预测

1. 科研需求驱动

• 学术研究：全球古生物学家对龟类起源的争论持续升温，正南龟（2.8亿年前）与原颚龟（2亿年前）的祖先地位争议，使侏罗纪龟化石成为关键研究材料。 • 地层对比：四川盆地古地理变迁研究需大量化石标本，国际学术机构对完整龟化石的采购需求持续增长。

2. 市场供需关系

• 供给端：中国对古生物化石开采严格管控，私人藏品流通受限，完整龟化石上拍量年均不足10件。 • 需求端：高净值人群对“不可再生资源”的配置需求上升，化石收藏从专业领域向大众投资市场渗透。 • 价格趋势：近5年龟化石年均涨幅达18%，高于艺术品市场平均水平。

3. 政策与文化影响

• 法律保障：中国《古生物化石保护条例》明确重点保护化石名录，合法流通的龟化石具备文物级稀缺性。 • 文化认同：化石作为“地球记忆”的载体，契合国内收藏市场对“历史感”与“独特性”的追求，年轻藏家群体占比逐年提升。 •

2. 法律合规

• 确认藏品来源合法，避免涉及盗掘或非法出口的化石；

3. 投资策略

• 长期持有：化石价格受学术发现驱动，如2025年重庆回兴工地新发现背甲残留物，推动同类化石价值重估； • 组合配置：与恐龙蛋化石、海百合化石等形成“古生物主题”收藏组合，提升抗风险能力。

五、结语

此件侏罗纪蛇颈龟化石以200万元起拍，兼具科学探索价值、历史见证意义与市场稀缺性。其升值潜力源于学术研究的持续需求、市场供给的严格限制以及文化认同的深化。对于收藏家而言，这不仅是一件艺术品，更是一把打开1.8亿年前地球生命奥秘的钥匙。

Auction information on ancient turtle fossils: Analysis of collection value and appreciation potential with a starting price of 2 million yuan

1、 Basic information of the collection

Name: Jurassic Snake necked Turtle Fossil

Era: Middle Jurassic to Late Jurassic (approximately 180 million to 140 million years ago)

Origin: Jiangbei District, Chongqing, China

Geological background: Discovered in red sandstone and mudstone limestone layers, forming a symbiotic relationship with dinosaur bones, it belongs to the standard indicator fossil of the Da'anzhai section of the Jurassic Ziliujing Formation in the Sichuan Basin.

Specimen characteristics:

The complete outline of the turtle shell, with a dorsal shell diameter of about 25cm, retains the black calcareous skirt and radiating patterns;

Missing head, tail, and limbs, but some specimens were reconstructed for internal skeletal structure using micro CT technology;

The rock quality differs significantly from the surrounding strata and exhibits typical sedimentary environmental characteristics.

2、 Analysis of Collection Value

1. Scientific Value: A "Living Textbook" of Paleontological Evolution

Stratigraphic division: As a biological basis for the division of Jurassic strata in the Sichuan Basin, its radiation patterns show independent evolutionary paths compared to contemporaneous fossils in Europe, providing key evidence for the restoration of paleogeographic environments.

 Species evolution: It reveals the morphological differentiation characteristics of the snake necked turtles from lack of midgut armor to complete carapace of adult turtles, supporting the new hypothesis of early evolution of turtles proposed by the Chinese Academy of Sciences.

Symbiotic relationship: It forms a paleontological community with dinosaur bones and bivalve fossils, reflecting the ecological environment of lakes and rivers in the Jurassic period.

2. Historical Value: A Milestone in Chinese Paleontological Research

Discovery history: During the construction of the Chengdu Chongqing Railway in 1950, the first generation of paleontologists in New China, Chen Chongshu, collected the first batch of snake necked turtle fossils, which are now preserved in the Chongqing Natural History Museum and became the starting point for the study of vertebrate fossils in the southwestern region.

Academic relevance: Comparison with Late Jurassic turtle fossils from Weiyuan, Sichuan, revealing species diversity within the basin; Experts from the French National Museum of Natural History participated in the study of carapace patterns and established a comparative system of fossils from the Eurasian continent.

3. Market value: the "hard currency" of fossil collections

Auction records:

The transaction price of turtle shell fossils in 2017 was HKD 4.6 million;

The transaction price of shell fossils in 2018 was HKD 33 million;

The transaction price of Guizhou Longhua Stone in 2019 was SGD 352000.

Price range: According to data from China Antique Network, the market price of turtle fossils ranges from 2 million to 7 million yuan, and the starting price of 2 million yuan is a reasonable range.

Scarcity: Jurassic turtle fossils in Chongqing have only been found in a few locations such as Jiangbei and Hechuan, and complete specimens are rare in existence.

3、 Prediction of appreciation potential

1. Driven by research needs

Academic research: The debate among paleontologists worldwide over the origin of turtles continues to heat up, with the ancestral status of the South China Turtle (280 million years ago) and the Protognathus Turtle (200 million years ago) disputed, making Jurassic turtle fossils a key research material.

Stratigraphic correlation: The study of paleogeographic changes in the Sichuan Basin requires a large number of fossil specimens, and the demand for complete turtle fossils from international academic institutions continues to grow.

2. Market supply and demand relationship

Supply side: China strictly controls the mining of paleontological fossils, restricts the circulation of private collections, and the average annual auction volume of complete turtle fossils is less than 10.

Demand side: The high net worth population's demand for the allocation of "non renewable resources" is increasing, and fossil collections are penetrating from professional fields into the mass investment market.

Price trend: In the past 5 years, the average annual increase in turtle fossils has reached 18%, higher than the average level of the art market.

3. Policy and cultural influence

Legal protection: China's "Regulations on the Protection of Paleontological Fossils" clearly specify the list of key protected fossils, and legally circulated turtle fossils have cultural relic level scarcity.

Cultural identity: Fossils, as carriers of "Earth's memory", are in line with the domestic collection market's pursuit of "historical sense" and "uniqueness", and the proportion of young collectors has been increasing year by year.

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2. Legal compliance

Confirm that the source of the collection is legal and avoid fossils involved in illegal excavation or export;

3. Investment Strategy

Long term holding: Fossil prices are driven by academic discoveries, such as the discovery of armor residues at the Huixing construction site in Chongqing in 2025, which will promote the revaluation of similar fossil values;

Combination configuration: Form a "paleontological themed" collection combination with dinosaur egg fossils, lily fossils, etc. to enhance risk resistance.

V. Conclusion

This Jurassic plesiosaur fossil starts at 2 million yuan and combines scientific exploration value, historical witness significance, and market scarcity. Its appreciation potential stems from the sustained demand for academic research, strict limitations on market supply, and deepening cultural identity. For collectors, this is not only an artwork, but also a key to unlocking the mysteries of life on Earth 180 million years ago.