Neochiastozygus junctus
Set number: 1941
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10µm
Set number: 1940
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Set number: 1939
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10µm
Set number: 1938
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10µm
Set number: 1937
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10µm
Set number: 1936
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10µm
Set number: 1935
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A large (> 11.0 μm) species of Neochiastozygus characterised by a symmetrical diagonal cross with arms joined for most of their length and separated near the wall.
The narrow outer wall remains in constant extinction, while the inner wall exhibits first-order white interference colours with dextrogyre inclined extinction lines and length-fast (−) elongation on the distal side. The crossbar appears dimmer in this orientation, with its arms exhibiting length-fast (−) elongation.
Bramlette, M. N. & Sullivan, F. R. 1961, Coccolithophorids and related nannoplankton of the Early Tertiary in California. Micropaleontology 7(2): 129-188.
Perch-Nielsen, K., 1971d. Neue Coccolithen aus dem Paläozän von Dänemark, der Bucht von Biskaya und dem Eozän der Labrador See. Bulletin of the Geological Society of Denmark 21, 51-66.
Holotype
Zygodiscus junctus
Bramlette & Sullivan, 1961
Late Paleocene
Lodo section, northwestern Fresno County, central California, USA