Petromyzontiformes
E712156
Petromyzontiformes is an order of jawless, eel-like fishes commonly known as lampreys, characterized by their toothed, funnel-like sucking mouths and primitive vertebrate features.
Statements (54)
| Predicate | Object |
|---|---|
| instanceOf |
group of jawless fishes
ⓘ
taxonomic order ⓘ |
| bodyPlan |
elongated cylindrical body
ⓘ
suctorial oral disc at anterior end ⓘ |
| circulatorySystem | closed circulatory system ⓘ |
| class | Hyperoartia NERFINISHED ⓘ |
| commonName | lampreys ⓘ |
| ecologicalRole |
parasites of other fishes
ⓘ
prey for larger fishes and aquatic predators ⓘ |
| evolutionarySignificance |
represent primitive extant vertebrates
ⓘ
used as model organisms for vertebrate evolution studies ⓘ |
| eyeDevelopment |
adults with well-developed eyes
ⓘ
larvae with poorly developed eyes ⓘ |
| feedingType |
detritivorous larvae
ⓘ
hematophagous in many species ⓘ |
| geologicalHistory | fossil record extends back to Paleozoic ⓘ |
| habitat |
freshwater lakes
ⓘ
freshwater rivers ⓘ marine waters ⓘ |
| hasCharacteristic |
ammocoete larval stage
ⓘ
anadromous life cycle in many species ⓘ cartilaginous branchial basket ⓘ cartilaginous skeleton ⓘ dorsal fin or fins ⓘ ectoparasitic feeding in many species ⓘ eel-like body ⓘ jawless ⓘ keratinous teeth ⓘ lack of paired fins ⓘ lack of true vertebral centra ⓘ non-parasitic adult stage in some species ⓘ notochord persistent in adults ⓘ rasping tongue-like oral piston ⓘ seven pairs of gill pouches ⓘ single median nostril ⓘ slimy skin without scales ⓘ toothed funnel-like sucking mouth ⓘ |
| hasLifeStage |
free-swimming adult stage
ⓘ
larval ammocoete stage in sediment ⓘ |
| hasOrgan |
lateral line system
ⓘ
pineal organ ⓘ two-chambered heart ⓘ |
| includesTaxon | Petromyzontidae NERFINISHED ⓘ |
| kingdom | Animalia ⓘ |
| lacksOrgan |
paired fins
ⓘ
swim bladder ⓘ true jaws ⓘ true stomach ⓘ |
| phylum | Chordata ⓘ |
| reproduction | semelparous breeding (breed once then die) ⓘ |
| skeletonType | cartilaginous ⓘ |
| subphylum | Vertebrata NERFINISHED ⓘ |
| superclass | Cyclostomata NERFINISHED ⓘ |
| taxonRank | order ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.