TABLE 4 in Small naviculoid species of Kobayasiella Lange-Bertalot, Adlafia Moser, Lange-Bertalot & Metzeltin, Nupela Vyverman & Compère and Sellaphora Mereschowsky from Tursujuq National Park, Hudson Bay region, Nunavik, Québec

TABLE 4. — Key distinctive traits of the newly described species.
SpeciesValve outlinePosition of central raphe fissuresTerminal raphe fissuresOrientation of striaeStructural formation of areolae within striaeKobayasiella tursujuqensis sp. nov.Small, linear to linear-lanceolateBetween mid-valve and apexCurved, deflected, not hooked, on the secondary side of valve openingStrongly radiate at mid-valve to strongly convergent at apicesSometimes expanded around the central area, occluded with 4-8 rows of poresAdlafia umiujaqensis sp. nov.Linear-elliptic to elliptic with rounded endsNo kink-like irregularity halfway between mid-valve and apexCurved down onto upper region of mantleWeakly radiate at mid-valve to parallel or weakly convergent at apices, continuous from valve face to mantleRound to rectangular, 5-7 per stria, 3-4 at apices, covered by a fine poroid velum with 8-11 circular rows of small poresAdlafia ossiformis sp. nov.Elliptic at mid-valve with broad capitate endsNo kink-like irregularity halfway between mid-valve and apexCurved down onto upper region of mantleContinuous, straight to weakly arched from valve face to mantle, more widely spaced around central areaRound to rectangular, 4-6 per stria, covered with a fine poroid velum with 8-9 circular rows of small poresSellaphora vincentiana sp. nov.Linear-elliptic to elliptic with restricted rostrate endsNo kink-like irregularity halfway between mid-valve and apexBent down onto upper region of mantle, opening into a small circular depressionMore widely spaced around central area, parallel throughoutRound to rectangular, 8-10 per stria, 3-4 at apices, covered with a recessed fine poroid velum with circular rows of small and almost indistinct pores