The species is widely found on natural and artificial substrates in the Black Sea year-round, and in the Sea of Japan, at a water temperature down to в€’1.5 вЊ. Agardh, 1832 in the microphytobenthos of the Black Sea and Sea of Japan, including water areas of specially protected natural areas of Russia. For the first time, unique micrographs of the species in vivo were obtained under a LM, and of purified frustules вЂ“ under a SEM.ДЄnalysis of long-term data (1987вЂ“2019) was carried out on the morphology and autecology of the benthic colonial large-cell species Striatella unipunctata (Lyngbye) C.

In the Paris Bay (Russky Island) of the Sea of Japan in the water area of the Marine Mammal Research Base of the Primorsky Oceanarium (Vladivostok), the abundance in the asbestos plates periphyton was of 207в™±0Ві cells cmв€’2, respectively, in July (t = +23.5 вЊ) at a depth of 2.5 m.cmв€’2 in January (t = +6.9 вЊ) in the epizoon of the cultured mussel Mytilus galloprovincialis Lamarck, 1819 at a depth of 0.5 m at excessive organic pollution of water.In the Kazachya Bay of the Black Sea near the Oceanarium, the absolute maximum abundance was recorded вЂ“ 41.6в™±0Ві cells unipunctata was studied under a Hitachi SEM, model SU3500 (Japan), in Leica EM ACE200 gold-palladium-coated samples. The morphology of the frustule ultrastructure of St. For the first time, quantitative indicators of the species populations from the Black Sea and Sea of Japan were compared. unipunctata valves and frustules were studied in vivo under LMs, and frustule ultrastructure, under a scanning electron microscope (SEM). The cell size range of populations is presented: for the Black Sea, valves 25вЂ“148 Вµm long, 8вЂ“22 Вµm wide, frustules 36.3вЂ“50.4 Вµm wide, 18вЂ“24 fibulae in 10 Вµm, and 7вЂ“8 girdle bands in 10 Вµm for the Sea of Japan, valves 85вЂ“125 Вµm long, 12вЂ“21 Вµm wide, 7вЂ“8 girdle bands in 10 Вµm, 20вЂ“25 fibulae in 10 Вµm, frustules 32.0вЂ“34.3 Вµm long, 10вЂ“11 Вµm wide, and 25 fibulae in 10 Вµm. Species morphology, phytogeography, and ecology are described.

unipunctata quantitative data were determined by direct cell counting in the Goryaev camera under light microscopes (LMs) Biolam L-212, Axioskop 40, and Olympus BX41. Analysis of long-term data (1987вЂ“2019) was carried out on the morphology and autecology of the benthic colonial large-cell species Striatella unipunctata (Lyngbye) C.

Primorsky oceanarium