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Loxosomella coronata sp. nov. (Entoprocta: Loxosomatidae) demonstrates a new type of coloniality for entoproctsстатья
- Автор: Borisanova A.O.
- Журнал: Marine Biodiversity
- Год издания: 2021
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- DOI: 10.1007/s12526-021-01224-6
- Аннотация: Many invertebrate animals form colonies. There are different ways of forming colonies, but they are usually the result of asexual reproduction when agametic clones remain physically and physiologically connected. Entoprocts are capable of propagating asexually and forming colonies of genetically identical modules by stolonial budding or lateral budding on the stalk of the maternal zooid. All previously described colonial entoprocts belong to the order Coloniales. Order Solitaria includes solitary animals that reproduce asexually by budding on the calyx, with separation of the buds after development. The new species Loxosomella coronatus sp. nov., which is described from the Sea of Okhotsk, differs markedly from all other Solitaria in forming temporary colonies. In L. coronatus, the buds, which normally release after development, remain attached to the maternal zooid and develop a new generation of buds, which also do not detach and give rise to subsequent generations. Species was studied using light microscopy, scanning electron microscopy and histological methods. The zooids are approximately 1 mm, the calyxes usually bear 18 tentacles, and the edge of the calyx has regular conical appendages. Both males and females are present within the same colony, confirming the idea that most loxosomatids are hermaphrodites. The transition to coloniality in L. coronatus can probably be explained by nutritional advantages, that closely spaced zooids obtain by creating more efficient water flow for filter feeding.
- Добавил в систему: Борисанова Анастасия Олеговна