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Taxonomy > Columbellidae > Parvanachis < Previous species - Next species > (within the family) Parvanachis nigricans (Sowerby I, 1844) Keen (1971) Sea shells of tropical West America. Marine Mollusks from Baja California to Peru. - p. 581 Skoglund (2002) Panamic province molluscan literature: additions and changes from 1971 through 2000. III Gastropoda. - p. 131 Battaglia & Bertoli Battaglia (2020) Seashells of Las Perlas / Conchiglie delle Isole delle Perle. - p. 60 Statistics Frequency rare - 8 localities (4.02 %) Sediment 10 (0 fine >> 100 coarse sediment) Size and comments The literature indicates a length of 8.5mm what is nearly reached by beach finds. Common in the northern end of the Gulf. Images Length 6.2mm. Taxonomy > Columbellidae > Parvanachis < Previous species - Next species > (within the family)