unioid

From unio +‎ -oid. Compare unionoid.^[1]

unioid (comparative more unioid, superlative most unioid)

1. (rare) Resembling or characteristic of the unios.

unioid (plural unioids)

1. (rare) Synonym of unionoid.
   • 1987 July, Cathryn R. Newton, Michael T. Whalen, Joel B. Thompson, Nienke Prins, David Delalla, “Systematics and Paleoecology of Norian (Late Triassic) Bivalves from a Tropical Island Arc: Wallowa Terrane, Oregon”, in Journal of Paleontology, volume 61, number S22 (Paleontological Society Memoir 22), Tulsa, Okla.: Society of Economic Paleontologists and Mineralogists, →DOI, →ISSN, →OCLC, page 1:

     Thirty-five bivalve taxa from the Hells Canyon locality are discussed. Of these, seven are new: the mytilid Mysidiella cordillerana n. sp., the limacean Antiquilima vallieri n. sp., the true oyster Liostrea newelli n. sp., the pectinacean Crenamussium concentricum n. gen. and sp., the unioid Cardinioides josephus n. sp., the trigoniacean Erugonia canyonensis n. gen. and sp., and the carditacean Palaeocardita silberlingi n. sp.

   • 1996, George R. McGhee, Jr., “Victims and Survivors”, in The Late Devonian Mass Extinction: The Frasnian/Famennian Crisis (Critical Moments in Paleobiology and Earth History Series), New York, N.Y.: Columbia University Press, →ISBN, page 84:

     Species of the oldest freshwater bivalve genus, the unioid Archanodon, are well known from Frasnian strata in New York State (Bridge et al. 1986).

   • 2002, Erik Jeppesen, Ilkka Sammalkorpi, “Lakes”, in Martin R. Perrow, Anthony J. Davy, editors, Handbook of Ecological Restoration, volume 2 (Restoration in Practice), Cambridge, Cambridgeshire: Cambridge University Press, →ISBN, part 2 (The biomes), page 308, column 2:

     Large unioids like Anodonta, Unio and Hyridella are sometimes abundant in well-mixed macrophyte-dominated lakes and can filter the entire water volume in 1.5–3 days (Ogilvie & Mitchell, 1995).