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Identification of gut contents and microscopical observations of the gut epithelium of the macrophagous ascidian Cibacapsa gulosa Monniot and Monniot 1983 (Phlebobranchia, Octacnemidae)

AuthorsLescano, M.N.; Fuentes, Veronica ; Sahade, Ricardo; Tatián, M.
Cibacapsa gulosa
Prey items
Gut epithelium
Issue DateJan-2011
CitationPolar Biology 34(1): 23-30 (2011)
AbstractOctacnemids represent a different pathway in the evolution of the typical filter-feeding ascidians. We examine and identify the prey items in the gut contents and describe the cell types that constitute the inner wall of different sections of the gut of the macrophagous octacnemid Cibacapsa gulosa collected in the South Sandwich Islands, Antarctica. A great variety of prey items were found: polychaetes, copepods, halacarids, amphipods, isopods and ophiuroids. The internal wall of the gut is lined with a monostratified, prismatic epithelium. Different cell types occur in the inner wall in different sections. The presence of zymogenic cells throughout the internal gut epithelium, as well as the presence of concretion cells in the stomach of C. gulosa, also present in the macrophagous tunicate group Sorberacea (= Hexacrobylidae), can be considered as an adaptation to the macrophagous diet.
Description8 pages, 5 figures, 2 tables
Publisher version (URL)http://dx.doi.org/10.1007/s00300-010-0852-6
Appears in Collections:(ICM) Artículos
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