This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionTriceratium morlandii var. morlandii.jpg
Русский: Панцирь ископаемой диатомовой водоросли Triceratium morlandii var. morlandii Grove & Sturt. Образцы диатомитов из Оамару (Новая Зеландия), возраст 32-40 млн. лет. Для детализации панциря использован переменный фазовый контраст.
English: Fossil Diatom Frustule - Triceratium morlandii var. morlandii Grove & Sturt
The diatomite sample is from Oamaru field (New Zealand), age: 32-40 million years old.
Light microscopy, for frustule detailed elaboration was used variable phase contrast.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the licence, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible licence as the original.