NOUN
- primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework; usually occurs in sessile colonies
How To Use poriferan In A Sentence
- In that time, the first undoubted fossil annelids, arthropods, brachiopods, echinoderms, molluscs, onychophorans, poriferans, and priapulids show up in rocks all over the world.
- For that matter, even the syncytial ‘gut’ departs further from the cnidarian or poriferan system than from the bilaterian archenteron.
- Poriferans don't have mouths; instead, they have tiny pores in their outer walls through which water is drawn.
- Namapoikia rietoogensis gen. et sp. nov. is up to 1 meter in diameter and bears a complex and robust biomineralized skeleton; it probably represents a cnidarian or poriferan. The Cambrian as an evolutionary exemplar - The Panda's Thumb
- In all cases, poriferans have a canal system, through which they pump water.
- Between 1859 and 1866, he worked on many "invertebrate" groups, including radiolarians, poriferans (sponges) and annelids (segmented worms).
- With a worldwide fauna of at least 15,000 species, poriferans are among the most diverse of sessile marine taxa.
- Because all three main clades of bilaterian animals express a let-7 RNA that is temporally regulated, but cnidarian, poriferan and all non-animal species that we analysed do not express a detectable let-7 RNA, we propose that the gene evolved after the divergence of diploblastic and bilaterian animals Teach the Controversy
- The first seems to have occurred before the split between poriferans and the other metazoans.
- Because all three main clades of bilaterian animals express a let-7 RNA that is temporally regulated, but cnidarian, poriferan and all non-animal species that we analysed do not express a detectable let-7 RNA, we propose that the gene evolved after the divergence of diploblastic and bilaterian animals Teach the Controversy
