polyplacophora การใช้

• Handbook of Systematic Malacology, Part 1 ( Loricata [ Polyplacophora ]; Gastropoda : Prosobranchia ).
• Molecular and fossil evidence seemed to put Aplacophorans in the clade Aculifera, as a sister group to Polyplacophora.
• "' Dycheiidae "'is a wastebasket taxon containing problematic polyplacophora from Upper Cambrian strata in the USA.
• It also plays a role in the haemolymph of the polyplacophora where it serves to rapidly transport iron to the mineralizing radula.
• The foot and pallial groove are very difficult indeed to discriminate from the polyplacophora, supporting its placement in this group by molecular methods
• However, a truly homologous " osphradium " is yet to be found in some groups, such as in Lepidopleuridan chitons ( Polyplacophora ).
• A "'girdle "'is part of the anatomy of a chiton, one class of marine mollusks, the class Polyplacophora.
• Conchologists mainly deal with four molluscan orders : the gastropods ( snails ), bivalves ( clams ), Polyplacophora ( chitons ) and Scaphopoda ( tusk shells ).
• The network of internal cavities within sclerites of the halkieriid " Sinosachites " have been likened to the aesthete canals in polyplacophora, strengthening the case for a molluscan affinity.
• This is unlike the polyplacophora, who have a number of pairs of ctenidia, but this number varies and is not related to the number of their body'segments '.
• Based on the bipartite nature of the radular dentition pattern in solenogasters, larval gastropods and larval polyplacophora, it has been postulated that the ancestral mollusc bore a bipartite radula ( although the radular membrane may not have been bipartite ).
• The fossil record does indicate that the ancestral mollusc was monoplacophoran-like and that the Polyplacophora arose from within the Monoplacophora & ndash; not the other way round; this could be reconciled if a secondary loss of shells caused a monoplacophoran body form to reappear secondarily.
• Recent analysis of the ultra structural and mechanical properties of the teeth present in that of " Chiton glaucus " and other organisms in the class Polyplacophora, one of the seven classes of mollusks, have shown to exhibit teeth of the most hardness and stiffness of any biomaterials known to date.