Neolampas is similar to Pisolampas in having a monobasal apical system with three gonopores (no gonopore in the left anterior genital plate), with one or two occluded pores in the adoral ambulacra. Neolampas can be distinguished from Pisolampas by the position of its periproct, being marginal to inframarginal, with an overhang of the posterior interambulacrum. Pisolampas has a supramarginal periproct, with a deep anal sulcus.
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