Taxonomy of Paleozoic radiolarian genera Author Noble, Paula Author Aitchison, Jonathan C. Author Danelian, Taniel Author Dumitrica, Paulian Author Maletz, Jörg Author Suzuki, Noritoshi Author Cuvelier, Jessie Author Caridroit, Martial Author O’Dogherty, Luis text Geodiversitas 2017 2017-09-29 39 3 419 502 http://dx.doi.org/10.5252/g2017n3a4 journal article 10.5252/g2017n3a4 1638-9395 5206585 urn:lsid:zoobank.org:pub:603CD230-5931-4506-A122-9CBC2F89189F Cornum Schwartzapfel & Holdsworth, 1996 Cornum Schwartzapfel & Holdsworth, 1996: 230 . TYPE SPECIES . — Cornum mittereri Schwartzapfel & Holdsworth, 1996 ( Schwartzapfel & Holdsworth 1996: 246 , pl. 36, fig. 1-5, 10, 15-19). AGE AND LOCATION OF TYPE MATERIAL . — Middle Chesterian/ lower Namurian (lower Carboniferous), Delaware Creek Member, “Caney” Shale, Southern Arbuckle Mountains, Oklahoma , USA . TAXON CODE. — 278. STATUS. — Valid. DIAGNOSIS. — “Test as with subfamily; imperforate, segmented, asymmetrically conical (rarely symmetrically conical) in shape; subtriangular to rhamphoid-like in outline. Shell flattened, compressed parallel to the plane of bilateral symmetry. Shell half open with lateral slit developed along convex side of shell (in lateral view). Lateral slit continuous with basal aperture. Lamellar wing, situated above basal aperture, originating along convex side of shell between open portion of shell wall. Wing variable in size and shape. Columellae(?) present; not observed in material studied.” ( Schwartzapfel & Holdsworth 1996: 230 ).