Distribution of Dasya hutchinsiae Harvey, 1833 (Ceramiales, Rhodophyta) in the Northern Black Sea Region

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Abstract

For the flora of the Cape Martyan territorial aquatic reserve and the hydrobotanical region of the Black Sea Southern Coast of Crimea, the species Dasya hutchinsiae Harvey has been indicated for the first time. Its diagnostic features have been clarified and illustrated. It has been shown that four localities of D. hutchinsiae are currently known in four hydrobotanical regions in the Northern Black Sea region, including three directly off the coast of Crimea. The rarity of the species may be due to its belonging to the category of pulsating elements of the regional flora.

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About the authors

S. Ye. Sadogurskiy

Nikitsky Botanical Gardens – National Scientific Center, Russian Academy of Sciences

Author for correspondence.
Email: ssadogurskij@yandex.ru
ORCID iD: 0000-0002-5374-9838
Russian Federation, Yalta, 298648

T. V. Belich

Nikitsky Botanical Gardens – National Scientific Center, Russian Academy of Sciences

Email: ssadogurskij@yandex.ru
ORCID iD: 0000-0002-8326-7442
Russian Federation, Yalta, 298648

S. A. Sadogurskaya

Nikitsky Botanical Gardens – National Scientific Center, Russian Academy of Sciences

Email: ssadogurskij@yandex.ru
ORCID iD: 0000-0002-2327-9484
Russian Federation, Yalta, 298648

References

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2. Fig. 1. Hydrobotanical zoning of coastal marine waters and localities of Dasya hutchinsiae Harvey in the Northern Black Sea region (after Kalugina-Gutnik, 1975). HBR: 1 - Odessa coast, 2 - Zernov's Phyllophora field, 3 - Yegorlytsko-Tendrovsko-Dzharylgachsko-Perekopsky district, 4 - Karkinitsky Gulf, 5 - Tarkhankutsko-Sevastopolsky district, 6 - Sevastopol Bay, 7 - Southern coast of Crimea, 8 - Prikerchensky district, 9 - Novorossiysk Bay, 10 - North-Eastern coast, 16 - Sea of ​​Azov (11-15 - do not belong to the Northern Black Sea region). Localities of D. hutchinsiae: I - after: Kalugina-Gutnik (1974, 1975); II – based on: Evstigneeva, Tankovskaya (2010); III – based on: Teyubova (2010); IV – own collections near the southern coast of Crimea in the waters of the Mys Martyan Nature Reserve (2023).

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3. Fig. 2. General appearance of Dasya hutchinsiae Harvey specimens found off the southern coast of Crimea in the waters of the Mys Martyan Nature Reserve (depth 4.0–4.5 m): a – in the wild (02.07.2023); b – in laboratory conditions (22.06.2023).

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4. Fig. 3. Fragments of Dasya hutchinsiae Harvey thalli found near the southern coast of Crimea in the waters of the Mys Martyan Nature Reserve on 22.06.2023 (depth 4.0–4.5 m): a – branching pattern in the upper part of the thallus; b – characteristic appearance of the apical section of an individual branch; c – arrows indicate cortical cells in the middle part of the thallus; d – arrows indicate stichidia with sporangia.

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