. Bulletin of the British Museum (Natural History). CLASSIFICATION OF PLECTAMBONITACEA Thaerodonta mucronata Howe, 1965: 648; pi. 81, figs 18-29 from Aieman Limestone (L. Ashgill), Trans-Pecos, Texas, USA (and subspecies scahra Howe, 1965: 648; pi. 82, figs 9-11, also from the Aieman Limestone) Plectambonites rugosus noquettensis Hussey, 1926: 160; pi. 7, fig. 6 from Ogontz Member of Stonington Formation (Caradoc-Ashgill), east of Church, Michigan, USA. Thaerodonta nubila Roomusoks, 1981: 68; pi. 2, figs 6-10 from Adila Formation (U. Ashgill), Kaapsalyski Cliff, Estonia, USSR. Leptae
. Bulletin of the British Museum (Natural History). CLASSIFICATION OF PLECTAMBONITACEA Thaerodonta mucronata Howe, 1965: 648; pi. 81, figs 18-29 from Aieman Limestone (L. Ashgill), Trans-Pecos, Texas, USA (and subspecies scahra Howe, 1965: 648; pi. 82, figs 9-11, also from the Aieman Limestone) Plectambonites rugosus noquettensis Hussey, 1926: 160; pi. 7, fig. 6 from Ogontz Member of Stonington Formation (Caradoc-Ashgill), east of Church, Michigan, USA. Thaerodonta nubila Roomusoks, 1981: 68; pi. 2, figs 6-10 from Adila Formation (U. Ashgill), Kaapsalyski Cliff, Estonia, USSR. Leptaena recedens Sardeson, 1892: 330; pi. 4, figs 29-32 from Cincinnati Group (L. Ashgill), Spring Valley, Fillmore County, Minnesota, USA (revised Wang 1949: 20; pi. 11, figs 1-3 and Howe 1988: 214; figs , , 10, 11). Plectambonites rugosa-clarksvillensis Foerste, 1912: 127; pi. 1, figs 7a-c; pi. 10, figs 7a-d from the Richmond Group (L. Ashgill), Oxford, Ohio, USA (revised Howe 1972: 445; pi. 1, figs 1-3 and Howe 1979: 4; pi. 2, figs 14-17 and placed in synonymy of Thaerodonta recedens by Howe 1988: 214). Thaerodonta saunjaensis Roomusoks, 1981: 65; pi. 1, figs 1-5 from Saunja Member of Voore Formation (L. Ashgill), Miaremetsa, Estonia, USSR. Leptaena saxea Sardeson 1892: 330; pi. 4, figs 33-35 from Cincinnati Group (L. Ashgill), Bristol, Fillmore County, Minnesota, USA (revised Wang 1949: 21; pi. 11, figs 1-5). Species questionably assigned Plectambonites glabra Shaler, 1865: 64 from Ellis Bay Forma- tion ( Ashgill), Anticosti Island, Ouebec, Canada (revised by Twenhofel (1928: 190) as P. sericeus var. glaber, but unfigured; probably a Sowerbyella but true subgenus unknown). SOWERBYELLA (RVGOSOWERBYELLA) Mitchell, 1977 1977 Sowerbyella (Rugosowerbyella) Mitchell: 83 Type species. Plectambonites subcorrugatella Reed, 1917, a subjective senior synonym of Ptychoglyptus ambiguus Reed, 1952. Diagnosis. Like Sowerbyella (Sowerbyella) but with concen- tric rugae tru
Size: 1685px × 1482px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
