Anaspida
E414613
Anaspida is an extinct group of jawless, armored fishes known from the Silurian and Devonian periods, characterized by streamlined bodies and bony head shields.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Anaspida canonical | 5 |
| Galeaspida | 1 |
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
agnathan
ⓘ
extinct jawless fish clade ⓘ fossil taxon ⓘ vertebrate ⓘ |
| belongsTo | early agnathan radiation ⓘ |
| class | Anaspida self-link ⓘ |
| ecologicalRole |
marine swimmer
ⓘ
nektonic or nektobenthic animal ⓘ |
| firstAppearance | Silurian period NERFINISHED ⓘ |
| geologicalEra | Paleozoic NERFINISHED ⓘ |
| hasBodyPlan |
elongate fish-like form
ⓘ
flattened head region ⓘ |
| hasCharacteristic |
armored
ⓘ
bony head shield ⓘ hypocercal tail ⓘ jawless ⓘ lack of paired jaws ⓘ lateral position of gill openings ⓘ paired fins poorly developed or absent ⓘ small scales or plates on body ⓘ streamlined body ⓘ |
| hasImportance | understanding early vertebrate evolution ⓘ |
| hasSkeletalFeature |
cartilaginous internal skeleton (inferred)
ⓘ
dermal armor on head ⓘ reduced trunk armor compared to some ostracoderms ⓘ |
| hasTaxonomicRank | class ⓘ |
| isPartOf | early vertebrate fauna ⓘ |
| kingdom | Animalia ⓘ |
| knownFrom |
Devonian fossil deposits
ⓘ
Silurian fossil deposits ⓘ fossil record ⓘ |
| lastAppearance | Devonian period NERFINISHED ⓘ |
| livedIn |
Paleozoic seas
ⓘ
marine environments ⓘ |
| phylum | Chordata ⓘ |
| relatedTo |
Ostracodermi
ⓘ
other early jawless fishes ⓘ |
| status | extinct ⓘ |
| studiedInField |
paleoichthyology
ⓘ
paleontology ⓘ vertebrate paleontology ⓘ |
| subphylum | Vertebrata ⓘ |
| superclass | Agnatha ⓘ |
| temporalRangeEnd | Devonian ⓘ |
| temporalRangeStart | Silurian ⓘ |
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Galeaspida