. Bulletin of the British Museum (Natural History). COCKS & RONG. Fig. 69 Bilobia musca (Opik, 1930), from Kukruse Formation (L. Caradoc), Kohtla-Jarve, Estonia, USSR, interior of brachial valve showing the very elevated bema (based on BB 5202), x 12. anteriorly, which is why musca is assigned to Bilobia rather than given its own new genus. Species assigned Leptaena etheridgei Davidson, 1883: 170; pi. 12, figs 11, 12 from Craighead Limestone (U. Caradoc), Craighead, Girvan, Scotland, and subspecies B. etheridgei acuta Williams, 1962: 168; pi. 16, figs 3-7 from L. Ardwell Mud- sto
. Bulletin of the British Museum (Natural History). COCKS & RONG. Fig. 69 Bilobia musca (Opik, 1930), from Kukruse Formation (L. Caradoc), Kohtla-Jarve, Estonia, USSR, interior of brachial valve showing the very elevated bema (based on BB 5202), x 12. anteriorly, which is why musca is assigned to Bilobia rather than given its own new genus. Species assigned Leptaena etheridgei Davidson, 1883: 170; pi. 12, figs 11, 12 from Craighead Limestone (U. Caradoc), Craighead, Girvan, Scotland, and subspecies B. etheridgei acuta Williams, 1962: 168; pi. 16, figs 3-7 from L. Ardwell Mud- stones (M. Caradoc), Ardmillan Braes, Girvan, Scotland. Bilobia hemisphaerica Cooper, 1956: 760; pi. 192, figs 16-20; pi. 193, figs 10-36; pi. 194, figs 31-36 from Oranda Formation (L. Caradoc), Strasburg, Virginia, USA. Bilobia huanghuaensis Chang, 1983: 477; pi. 1, fig. 22 from U. Miaopo Formation (L. Caradoc), Huanghuachang, Yichang, Hubei, China. Sampo indentata Spjeldnaes, 1957: 69; pi. 2, figs 15-16; pi. 4, fig. 8 from 4b7 beds (M. Caradoc), west of Billingstad Station, Asker, Norway (revised Harper & Owen 1984: 29; pi. 3, figs 10, 12-15, 17-19, 21, 22, 24, 26, as Leptestiina indentata). Leptelloidea musca Opik, 1930: 140; pi. 8, figs 95, 97-108 from Idavere Formation (M. Caradoc), Kohtla, near Tallinn, Estonia. USSR. Leptelloidea rosendahli Spjeldnaes, 1957: 75; pi. 2, figs 4, 5 from Coelosphaeridium Beds (M. Caradoc), Fangberget, Ringsaker, Norway. Sowerbyites vesciseptus Percival, 1979: 106; fig. from Goonumbla Volcanics (L. Caradoc), Gunningbland, New South Wales, Australia. Bilobia virginiensis Cooper, 1956: 762; pi. 192, figs 1-15; pi. 195, figs 6-8 from Edinburg Formation (L. Caradoc), Strasburg, Virginia, USA. Species questionably assigned Plectambonites pisum Ruedemann, 1901: 19; pi. 1, figs 8-20 from Rysedorf Conglomerate (M. Ordovician). Rysedorf, Rensselaer County, New York, USA (difficult figures, but assigned to Bilobia by Cooper 1956: 762). LEANGEL
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