Publications by authors named "Olga Vladimirovna Ezhova"
Male reproductive system of the deep-sea acorn worm Quatuoralisia malakhovi (Hemichordata, Enteropneusta, Torquaratoridae) from the Bering Sea.
Front Zool
October 2024
Article Synopsis
- The deep-sea acorn worm Quatuoralisia malakhovi belongs to the phylum Hemichordata and possesses unique anatomical features due to its epibenthic lifestyle and habitat, yet its morphology remains under-researched.
- The research involves detailed histological analysis of the reproductive system, revealing that Q. malakhovi has separate sexes that are externally indistinguishable and includes observations of the testicular structure and function.
- Findings include specific details about testis architecture, the absence of yolk cells, and the fine structure of spermatozoa, which are characterized by an acorn-shaped head and a long flagellum.
The anatomy of Crinoidea differs from that of the other modern echinoderms. In order to see, whether such differences extend to the axial complex as well, we studied the axial complex of Himerometra robustipinna (Himerometridae, Comatulida) and compared it with modern Eleutherozoa. The axial coelom is represented by narrow spaces lined with squamous coelothelium, and surrounds the extracellular haemocoelic lacunae of the axial organ.
View Article and Find Full Text PDFStudies of echinoid microscopic anatomy over the last two centuries have created a number of inaccuracies and mistakes that have accumulated in the descriptions of the intricate organization of the coelomic system of Echinoidea. To clarify the situation, we reconstructed the axial complex and radial complex of the echinoid Strongylocentrotus pallidus. The water ring is located between the perivisceral coelom and the perioral coelom.
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