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Hexacontium sp. cf. H. gigantheum

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Differences from Hexacontium gigantheum
Richard N. Benson (28/10/2003)
Cortical shells of the Gulf of California tests are larger than those of Hexacontium enthacanthum and H.pachydermum and are within the size range of H. gigantheum as measured by Cortese and Bjørklund (1998). The Gulf species differs from H. gigantheum in having fewer, thus larger, pores of the cortical shell that are less regularly arranged in most specimens, although some show regular subequal pores; in some tests from the Gulf there are thorns along the bars as well as at the nodes.



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