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167 / Paleozoic
Sacabambaspis
Sacabambaspis janvieri
A broad head shield enclosed its front half, with forward-set eyes and a flexible tail behind the armored box.
Structured expansion · editorial review pending
- Time range
- About 470–450 million years ago
- Final stage
- Late Ordovician
- Geographic range
- Gondwanan shallow seas · Present-day Bolivia, Argentina, Australia and Oman
01 / ANSWER FIRST
What was Sacabambaspis?
This archive records Sacabambaspis under the scientific name Sacabambaspis janvieri, with an age of About 470–450 million years ago and a range of Gondwanan shallow seas · Present-day Bolivia, Argentina, Australia and Oman. A broad head shield enclosed its front half, with forward-set eyes and a flexible tail behind the armored box.
Sacabambaspis was a jawless fish about twenty-five centimeters long. Upper and lower head plates protected the gills, while small oral plates probably gathered organic matter or tiny food near the seabed.
02 / QUICK FACTS
Sacabambaspis at a glance
- Scientific name
- Sacabambaspis janvieri
- Age
- About 470–450 million years ago
- Last recorded stage
- Late Ordovician
- Known range
- Gondwanan shallow seas · Present-day Bolivia, Argentina, Australia and Oman
- Broad group
- fish
- Archive era
- Paleozoic
- Habitat signals
- Ocean
- Documented regions
- South America · Oceania
03 / ANATOMY
How was Sacabambaspis built?
Overall body plan
A broad head shield enclosed its front half, with forward-set eyes and a flexible tail behind the armored box.
Skull, jaws and feeding surfaces
The available record is interpreted through preserved proportions, attachment surfaces, wear and comparison with related organisms. For Sacabambaspis, those observations must be separated from features added only for visual reconstruction.
Fins and swimming body
Sacabambaspis was a jawless fish about twenty-five centimeters long. Upper and lower head plates protected the gills, while small oral plates probably gathered organic matter or tiny food near the seabed.
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 Sacabambaspis.
04 / DIET & BEHAVIOUR
How did Sacabambaspis live?
Sacabambaspis was a jawless fish about twenty-five centimeters long. Upper and lower head plates protected the gills, while small oral plates probably gathered organic matter or tiny food near the seabed. 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 water depth, current, oxygen, prey and nursery habitat. 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 Sacabambaspis live?
This archive currently lists About 470–450 million years ago; Gondwanan shallow seas · Present-day Bolivia, Argentina, Australia and Oman. 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
Gondwanan shallow seas · Present-day Bolivia, Argentina, Australia and Oman. This boundary can change when specimens are reidentified or new localities are published.
Time window
About 470–450 million years ago, with the final recorded stage listed as Late Ordovician. 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 Sacabambaspis?
Primary record
Bolivian concentrations and articulated individuals preserve head armor, eye position, gill openings and tail fins; isolated plates extend its range.
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 Sacabambaspis within About 470–450 million years ago and Gondwanan shallow seas · Present-day Bolivia, Argentina, Australia and Oman. 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 Sacabambaspis disappear?
Late Ordovician cooling, falling seas and oxygen stress reorganized shallow marine ecosystems and jawless-fish communities.
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
Sacabambaspis FAQ
What was Sacabambaspis?
This archive records Sacabambaspis under the scientific name Sacabambaspis janvieri, with an age of About 470–450 million years ago. A broad head shield enclosed its front half, with forward-set eyes and a flexible tail behind the armored box.
When did Sacabambaspis live?
The current archive range is About 470–450 million years ago; its youngest recorded stage is Late Ordovician.
Where was Sacabambaspis found?
The archive currently lists Gondwanan shallow seas · Present-day Bolivia, Argentina, Australia and Oman. Species-level locality assignments and the full geographic range still require source-specific review.
How do scientists know about Sacabambaspis?
Bolivian concentrations and articulated individuals preserve head armor, eye position, gill openings and tail fins; isolated plates extend its range.
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