While other fossil taxa like " Acaenoplax " and " Phthipodochiton " showed intermediate features between aplacophorans and polyplacophorans, no unambiguous fossil with an aplacophoran-like body and a polyplacophoran-like shell has been found before " Kulindroplax ".
12.
Marine biologist Am�lie H . Scheltema " et al . " ( 2003 ) argued that " Wiwaxia " s feeding apparatus was very similar to the radulas of some modern shell-less aplacophoran molluscs, and that the sclerites of the two groups are very similar.
13.
Marine biologist Am�lie H . Scheltema " et al . " ( 2003 ) argued that " Wiwaxia " s feeding apparatus is very similar to the radulas of some modern shell-less aplacophoran molluscs, and that the sclerites of the two groups are very similar.
14.
The shell-less aplacophora have a chitinous cuticle that has been likened to the shell framework; it has been suggested that tanning of this cuticle, in conjunction with the expression of additional proteins, could have set the evolutionary stage for the secretion of a calcareous shell in an aplacophoran-like ancestral mollusc.
15.
They argued that : " Halkieria " s sclerites resembled those of the modern solenogaster aplacophoran shell-less molluscs ( see ), of some modern polyplacophoran molluscs, which have several shell plates, and of the Ordovician polyplacophoran " Echinochiton "; " Halkieria " s shells are more similar to the shells of conchiferan molluscs, since shells of both of these groups show no trace of the canals and pores seen in polyplacophoran shell plates; the bristles of brachiopods and annelids are similar to each other but not to " Halkieria " s sclerites.
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