Actinopterygii ( ray-finned fishes) Fins txhawb los ntawm rays ntawm cov pob txha dermal es tsis yog pob txha mos. Ib pawg ntawm lub puab tsaig ntses muaj ntau haiv neeg uas tsis muaj ib lo lus txhais rau lawv tuaj yeem muab tau; nkag siab zoo dua los ntawm kev txiav txim siab cov cim tshwj xeeb ntawm cov tswv cuab qub thiab tom qab ntawd taug qab lawv…
Dab tsi yog chav kawm actinopterygii kab mob?
Kev faib tawm
- Polypteriformes (Bichirs, Reedfishes)
- Acipenseriformes (Sturgeons, Paddlefish)
- Lepisosteiformes (Gars)
- Amiiformes (Bowfin)
- Osteoglossiformes (cov ntses nqaij ntses)
- Hiodontiformes (mooneye, goldeneye …)
- Elopiformes (poj niam, tarpon …)
- Albuliformes (bonefishes)
osteichthyes txhais li cas hauv kev tshawb fawb?
Osteichthyes yog taxonomic superclass ntawm phylum Chordata (chordates) thiab suav nrog pawg ntses uas muaj pob txha pob txha feem ntau tsim los ntawm cov pob txha. … Osteichthyes ( bony fish) yog ib tug ntawm cov taxonomic superclasses ntawm ntses. Lwm tus yog chondrichthyes (cov ntses cartilaginous) thiab Agnatha (cov ntses tsis muaj lub puab tsaig).
Tus yam ntxwv ntawm actinopterygii yog dab tsi?
Cov Cim Tseem Ceeb:
- Nyias thiab elongated ntses.
- Lub cev yog npog los ntawm cov nplai me me. Lub taub hau cheeb tsam tsis muaj qhov ntsuas. Qee cov ntses tsis muaj nplais.
- Ntev dorsal thiab caudal fins yog spineless. Fins yuav tsis tau txais kev txhawb nqa los ntawm fins. …
- Lub qhov ncauj aperture yog qhov sib piv loj.
- Tsis muaj cov khoom siv ua pa ntxiv.
Qhov txawv ntawm actinopterygii thiab Sarcopterygii yog dab tsi?
Sarcopterygii thiab actinopterygii yog ob pawg ntawm osteichthyans. Qhov sib txawv tseem ceeb ntawm sarcopterygii thiab actinopterygii cia siab rau feem ntau ntawm lawv cov qauv fin. Sarcopterygii ntses hom muaj lobed fins, thaum cov ntses actinopterygii muaj ray fins.
