. Bulletin of the British Museum (Natural History). CLASSIFICATION OF PLECTAMBONITACEA 101. 47b Figs 46-47 Bimuria superhd Ulrich & Cooper, 1942, from Ariine Formation (), half mile cast of FTictulsvillc. Tennessee, USA. l-ig. 46, straight down, posterior and lateral views of brachial valve interior, BC 7269, x 3; Fig. 47. two views of a pair of conjoined valves showing comae, HC 7270, x 2. Bimuria triquetra Nikitin & Popov, 1984: 150; pi. 18, figs 6, 8, 11, 12 from Bestamakskaya Formation (U. Llandcilo-L. Caradoc), Novaya Archali Hill, Chinghiz Mountains, Kazakhst
. Bulletin of the British Museum (Natural History). CLASSIFICATION OF PLECTAMBONITACEA 101. 47b Figs 46-47 Bimuria superhd Ulrich & Cooper, 1942, from Ariine Formation (), half mile cast of FTictulsvillc. Tennessee, USA. l-ig. 46, straight down, posterior and lateral views of brachial valve interior, BC 7269, x 3; Fig. 47. two views of a pair of conjoined valves showing comae, HC 7270, x 2. Bimuria triquetra Nikitin & Popov, 1984: 150; pi. 18, figs 6, 8, 11, 12 from Bestamakskaya Formation (U. Llandcilo-L. Caradoc), Novaya Archali Hill, Chinghiz Mountains, Kazakhstan, USSR. Species questionably assigned Bimuria! apsadinata Su, 1980: 273; pi. 115, figs 1^ from Guanniaohe Formation (M. Ordovician), Lower Guanniao river, Nenjiang County, Hcilongjiang Province, NE China (no interiors figured). Bimuria dyfiensis Locklcy, 1980: 215; figs 60-62, 64, 65 from Geili-grin Formation (U. Caradoc), Rhiw March. Lianystwmdwy, Powys, Wales (no brachial interior known). Bimuria ? matutina Cooper, 1956: 768; pi. 210, figs 6-10 from boulder in Mystic conglomerate (Llanvirn ?), Stanbridge, Quebec, Canada (no interiors figured). Bimuria sp. 1 of Cooper, 1956: 772; pi. 210, figs 12-14 from Eureka Ouartzite (Llanvirn), Martins Ridge, Nevada, USA (no interior figured). Species rejected Bimuria immatura Cooper, 1956: 766; pi. 211, figs 1-3 from Effna Rich Valley Formation (L. Caradoc), Porterficld Quarry, Virginia, USA (transferred to Cooperea gen. nov.). Bimuria siphonata Cooper, 1956: 770; pi. 210, figs 17-24 from Pratt Ferry Formation (Llandeilo), Pratt Ferry, Alabama, USA (transferred to Cooperea gen. nov.). Bimuria sp. of Liu et al. 1983: 277; pi. 92, fig. 17 from Tangtou Formation (L. Ashgill), Chuxian County, Anhui Province, China (probably Christiania). Family SYNDIELASMATTOAE Cooper, 1956 1956 Leptestiinae Cooper: 700 pars 1956 Syndielasmatidac Cooper: 742 1965 Isophragmatinae Williams: H375 pars Diagnosis. Trifid cardinal process. No bema. Side septa us
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