Articles | Volume 19, issue 2
https://doi.org/10.1144/jm.19.2.159
https://doi.org/10.1144/jm.19.2.159
01 Dec 2000
 | 01 Dec 2000

Note on the preservational nature of ornamentation in sphaeromorphs assignable to Tapajonites Sommer & van Boekel, 1963 (Prasinophyta?)

Elz̀bieta Turnau

Abstract. Assemblages of Middle Devonian (Givetian) phytoplankton from the Holy Cross Mountains include sphaeromorphs possessing blister-like ornamentation typical of the genus Tapajonites Sommer & van Boekel, 1963. Study of the sculptural elements under high magnification indicates the presence of patterns resembling impressions of pyrite crystals. It is suggested that ornamentation in Tapajonites, or at least in some sphaeromorphs assignable to that genus, is of a secondary nature.

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