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Phragmactis Spencer 1943

urn:lsid:organismnames.com:name:3062674

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Phragmactis Spencer 1943

Spencer 1943. A monograph of the British Palaeozoic Asterozoa. Part X pp. 495-540 figs. 322-348 pls. xxxiii-xxxvii.. Palaeontographical Society Monograph, 1940 1943: pp. 495-540