View original imageThis is an original generative reconstruction, not a photograph or scientific plate.
162 / Precambrian
Spriggina
Spriggina floundersi
A horseshoe-shaped front led a body of offset leaflike units, giving it the appearance of a flattened soft worm.
Structured expansion · editorial review pending
- Time range
- About 555–550 million years ago
- Final stage
- Late Ediacaran
- Geographic range
- Shallow Ediacaran seafloor · Present-day South Australia
01 / ANSWER FIRST
What was Spriggina?
This archive records Spriggina under the scientific name Spriggina floundersi, with an age of About 555–550 million years ago and a range of Shallow Ediacaran seafloor · Present-day South Australia. A horseshoe-shaped front led a body of offset leaflike units, giving it the appearance of a flattened soft worm.
Spriggina was only a few centimeters long. Its front may indicate directional movement, but its units do not align like those of modern segmented worms, and its relationships remain disputed.
02 / QUICK FACTS
Spriggina at a glance
- Scientific name
- Spriggina floundersi
- Age
- About 555–550 million years ago
- Last recorded stage
- Late Ediacaran
- Known range
- Shallow Ediacaran seafloor · Present-day South Australia
- Broad group
- invertebrate
- Archive era
- Precambrian
- Habitat signals
- Ocean
- Documented regions
- Oceania
03 / ANATOMY
How was Spriggina built?
Overall body plan
A horseshoe-shaped front led a body of offset leaflike units, giving it the appearance of a flattened soft worm.
Body symmetry and segmentation
The available record is interpreted through preserved proportions, attachment surfaces, wear and comparison with related organisms. For Spriggina, those observations must be separated from features added only for visual reconstruction.
Feeding and locomotor structures
Spriggina was only a few centimeters long. Its front may indicate directional movement, but its units do not align like those of modern segmented worms, and its relationships remain disputed.
Growth and individual variation
A single specimen does not define the whole species. Size, maturity, preservation and possible sex differences are considered before anatomical traits are treated as typical of Spriggina.
04 / DIET & BEHAVIOUR
How did Spriggina live?
Spriggina was only a few centimeters long. Its front may indicate directional movement, but its units do not align like those of modern segmented worms, and its relationships remain disputed. This ecological reconstruction is strongest where anatomy, associated organisms and the depositional setting point in the same direction.
05 / DIET & BEHAVIOUR
What shaped its ecological limits?
Its populations depended on substrate, water chemistry, food supply and ecological competition. Changes in any one factor did not necessarily cause immediate extinction, but interacting pressures could reduce range, recruitment and resilience.
06 / RANGE & HABITAT
Where and when did Spriggina live?
This archive currently lists About 555–550 million years ago; Shallow Ediacaran seafloor · Present-day South Australia. Fossil or historical occurrence data describe where evidence has been found, not every place the taxon once occupied. Species-level age and range limits still require source-specific review.
Documented geographic range
Shallow Ediacaran seafloor · Present-day South Australia. This boundary can change when specimens are reidentified or new localities are published.
Time window
About 555–550 million years ago, with the final recorded stage listed as Late Ediacaran. Rock units and dating uncertainty mean the true biological range may extend beyond the known record.
Environmental setting
The archive uses the broad habitat labels Ocean. These labels help explore related records; a habitat reconstruction requires evidence from individual localities.
07 / FOSSIL EVIDENCE
What evidence supports reconstructions of Spriggina?
Primary record
External molds from the Ediacara and Nilpena sandstones record the head outline, offset units and multiple growth stages.
Comparative anatomy
Preserved structures are compared with close and functionally similar organisms. The method can constrain posture and function, but analogy alone cannot prove colour, behaviour or soft tissue.
Age and locality
Stratigraphy and occurrence records place Spriggina within About 555–550 million years ago and Shallow Ediacaran seafloor · Present-day South Australia. Reworked fossils and uncertain provenance are treated cautiously.
Open entity records
Links below connect the archive to available taxonomic and occurrence records. A matching name does not verify every ecological claim, and related-taxon links provide comparison rather than an exact species match.
08 / DISAPPEARANCE & DEBATE
Why did Spriggina disappear?
The Ediacaran ages recorded here predate the Cambrian boundary. Seafloor ecological change offers context, but this archive has no direct evidence tying the disappearance of this species to burrowing or predation after the start of the Cambrian.
The last fossil or observation marks the youngest evidence currently known, not necessarily the death of the final individual. Explanations are strongest when timing, environmental change and population biology agree; otherwise the profile preserves uncertainty instead of assigning a single dramatic cause.
09 / FREQUENTLY ASKED QUESTIONS
Spriggina FAQ
What was Spriggina?
This archive records Spriggina under the scientific name Spriggina floundersi, with an age of About 555–550 million years ago. A horseshoe-shaped front led a body of offset leaflike units, giving it the appearance of a flattened soft worm.
When did Spriggina live?
The current archive range is About 555–550 million years ago; its youngest recorded stage is Late Ediacaran.
Where was Spriggina found?
The archive currently lists Shallow Ediacaran seafloor · Present-day South Australia. Species-level locality assignments and the full geographic range still require source-specific review.
How do scientists know about Spriggina?
External molds from the Ediacara and Nilpena sandstones record the head outline, offset units and multiple growth stages.
04 / SOURCES & FURTHER READING
Check the source record
Use the scientific name to compare taxonomy, occurrence records and the fossil record. Database coverage and classifications may differ.
05 / REVISION HISTORY
How has this record changed?
- Completed an AI-assisted bilingual audit of the archive record, corrected identified issues and clarified evidence limits; independent editorial review is pending.
- Expanded into a structured bilingual profile with anatomy, ecology, range, evidence, debate and FAQs; independent editorial review is pending.
- Verified authoritative entity sources and added three responsive reconstruction sizes.
- Initial bilingual species record published.
06 / CORRECTIONS & ADDITIONS