Crinoids yog cov tsiaj hauv hiav txwv uas muaj nyob hauv phylum Echinodermatathiab chav Crinoida.
Nyob rau hauv dab tsi phylum ua crinoids hlwb?
Crinoids yog cov tsiaj hauv hiav txwv uas tsim cov chav kawm Crinoidea, yog ib chav kawm ntawm phylum Echinodermata, uas kuj suav nrog cov ntses hnub qub, nkawg hnub qub, hiav txwv urchins thiab hiav txwv dib.
Vim li cas crinoids hauv Echinodermata phylum?
Crinoids (Phylum Echinodermata, Chav Kawm Crinoidea)
Lawvmuaj cov kab mob endoskeleton tsim los ntawm ntau tus neeg cov ntsiab lus (ossicles) uas muaj calcium carbonate thiab txuas nrog ligamentary cov ntaub so ntswg. … Crinoids, zoo li lwm yam echinoderms, muaj cov hlab ntsha hauv dej nrog cov pod-zoo li txuas ntxiv hu ua tube taw.
Koj tuaj yeem nrhiav crinoids nyob qhov twg?
Crinoids tau nyob hauv lub ntiaj teb dej hiav txwv txij thaum tsawg kawg yog pib ntawm Ordovician Lub Sijhawm, kwv yees li 485 lab xyoo dhau los. Tej zaum lawv yuav laus dua. Qee cov kws tshawb fawb paleontologists xav tias cov pob txha hu ua Echmatocrinus, los ntawm qhov chaw nto moo Burgess Shale pob txha nyob hauv British Columbia, tej zaum yuav yog qhov ntxov tshaj plaws crinoid.
Puas crinoids lom?
Crinoids tsis tshua muaj neeg tua ntses. Lawv tsim los ntawm ob peb qhov chaw noj tau thiab lawv qhov chaw spiny emit mucus uas qee zaum lom rau ntses.
