TY - JOUR

T1 - Histological description of Cercaria etgesii Shchenkov, 2017 daughter sporocysts (Trematoda: Pleurogenidae): compartmentalization of the brood cavity and germinal mass morphology

AU - Kremnev, Georgii A

AU - Shchenkov, Sergei V

PY - 2018/6/26

Y1 - 2018/6/26

N2 - Morphology of the daughter sporocysts of Cercaria etgesii Shchenkov, 2017 (Pleurogenidae) has been described according to conventional histological techniques and subsequent 3D reconstruction with Bitplanelmaris® software. Novel data were obtained concerning the spatial organization of the brood cavity of Pleurogenidae daughter sporocysts. It was shown that the laminated structures of the endocyst are lining the brood cavity and carry out its compartmentalisation by formation of the chambers around developing and disintegrating embryos of cercariae. First description of the germinal mass of the Pleurogenidae daughter sporocysts is given. No mitoses in germinal mass were evident although apparent production of the cercariae embryos by the sporocysts take place. The analogous principle of daughter sporocysts morphofunctional organisation was noted for the studied representatives of closely related taxa of trematodes: Pleurogenidae (C. etgesii) and Microphallidae (Microphallus 'pygmaeus' group).

AB - Morphology of the daughter sporocysts of Cercaria etgesii Shchenkov, 2017 (Pleurogenidae) has been described according to conventional histological techniques and subsequent 3D reconstruction with Bitplanelmaris® software. Novel data were obtained concerning the spatial organization of the brood cavity of Pleurogenidae daughter sporocysts. It was shown that the laminated structures of the endocyst are lining the brood cavity and carry out its compartmentalisation by formation of the chambers around developing and disintegrating embryos of cercariae. First description of the germinal mass of the Pleurogenidae daughter sporocysts is given. No mitoses in germinal mass were evident although apparent production of the cercariae embryos by the sporocysts take place. The analogous principle of daughter sporocysts morphofunctional organisation was noted for the studied representatives of closely related taxa of trematodes: Pleurogenidae (C. etgesii) and Microphallidae (Microphallus 'pygmaeus' group).

KW - Bithynia tentaculata

KW - Cercaria etgesii

KW - daughter sporocysts

KW - embryos development

KW - endocyst

KW - germinal mass

KW - REDIAE

KW - ACANTHATRIUM

KW - ENDOCYST

KW - N-SP TREMATODA

KW - LECITHODENDRIIDAE

KW - MCMULLEN

KW - EURYTREMA-PANCREATICUM

KW - ULTRASTRUCTURE

KW - LIFE-HISTORY

KW - REPRODUCTION

UR - http://www.scopus.com/inward/record.url?scp=85045884156&partnerID=8YFLogxK

U2 - 10.1515/ap-2018-0036

DO - 10.1515/ap-2018-0036

M3 - Article

C2 - 29654676

VL - 63

SP - 317

EP - 324

JO - Acta Parasitologica

JF - Acta Parasitologica

SN - 1230-2821

IS - 2

ER -