Exploring the anatomy of Cossura pygodactylata (Annelida, Cossuridae) using micro-computed tomography with special emphasis on gut architectureстатья Исследовательская статья

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Дата последнего поиска статьи во внешних источниках: 10 августа 2018 г.

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1. Полный текст Parapar_et_al2018Cossura.pdf 14,4 МБ 23 марта 2018 [azhadan@mail.ru]

[1] Exploring the anatomy of cossura pygodactylata (annelida, cossuridae) using micro-computed tomography with special emphasis on gut architecture / J. Parapar, A. Zhadan, A. Tzetlin et al. // Marine Biodiversity. — 2018. — P. 1–11. The anatomy of Cossura pygodactylata Jones, 1956 (Annelida; Cossuridae) is presented, based on the study of specimens collected during the BIOICE project in Icelandic waters and additional material from the White Sea. General gross external and internal anatomy were investigated by means of micro-computed tomography (micro-CT or μCT) and compared with results obtained with light microscopy histological sectioning (LMHS). Micro-CT reveal a highly regionalised gut, posterior to the pharyngeal cavity and oesophagus, divided in an anterior stomach and a posterior intestine with different morphologies. The stomach is in the thoracic region; dorsally positioned, and divided in a short and narrow anterior part and a longer posterior one, with an increasing diameter towards its posterior end. Both stomach regions bear a dorsal infolding of tissue, along its inner wall, here called typhlosole. The heart is dorsally located and contains a heart body above the hind stomach. The intestine is wider than stomach, without dorsal infolding inside the lumen and filling most part of internal body cavity. A transitional cup-shaped gut element connecting the stomach and the intestine could be observed at the level of the last thoracic segment. As a result of this study, we can conclude that μCT images reflect with reasonably well resolution main general elements of both gross external and internal anatomy of the Cossurids, but specially the gut architecture. [ DOI ]

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