New data on the ultrastructure of the proboscis in females of Bonellia viridis (Annelida: Bonellinae)
Tóm tắt
Although Bonellia viridis is the best studied echiurid species, many features of its anatomy and ultrastructure are still unclear. Detailed data on the organisation of the proboscis may help us to understand the echiurid biology and some aspects of their feeding behaviour. In this study, a detailed description of the proboscis epithelium of females of B. viridis is provided. According to histological specificities, four zones of proboscis stem can be distinguished: dorsal, ventral, and two lateral. These zones differ from each other in ciliation and abundance of bonellin-producing and gland cells. Each zone provides certain functions: protective for dorsal, transport of food particles for ventral, and agglutination of food particles for lateral. Ciliated cells have been described in the epithelium of the dorsal side of the proboscis stem for the first time. These cells probably supply the slow ciliary movements of the proboscis. For the first time, the organisation of epithelial cells is described: these cells contain many pinocytotic vesicles, multivesicular bodies, and phagosomes, whose presence may provide evidence of the ability of epithelial cells to consume nutrients. The absence of continuous basal lamina under the ventral epithelium is ascertained and may be explained by the activity of bonellin-producing cells, which constantly penetrate between epithelial cells. In bonellin-producing cells, voluminous perinuclear space and the contribution of rough endoplasmic reticulum into the formation of bonellin-containing granules are detected for the first time. For the first time, the neurite bundles extending from lateral nerve cords to gland cells and bonellin-producing cells are discovered.
Tài liệu tham khảo
Agius L, Jaccarini V (1981) Effects of light in pigment development in the echuran worm Bonellia viridis. J Zool 193:33–37
Amor A (1973) Modelos de sistema vascular en Echiura. Asoc Argent Ciencias Nat Physis Buenos Aires 32:115–120
Baltzer F (1931) Echiurida. In: Kückenthal W, Krumbach T (eds) Handbuch Der Zoologie. DeGruyter, Berlin, pp 62–168
Biseswar R (1991) Burrowing, locomotion and other movements of the Echiuran Ochetostoma caudex. Acta Zool 72:91–99. https://doi.org/10.1111/j.1463-6395.1991.tb00321.x
Bosch C (1977) Les cellules pigmentaires vertes de la Bonellie (Bonellia viridis Echmren) et leur role physiologique. C R Acad Sci (paris) 284:2123–2126
Bosch C (1979) Ultrastructure et comportment des cellules pigmentaires vertes de Bonellia viridis (Echrnren). Ann Sci Nat Zool 1:223–249
Bosch C (1981) La musculature, le squelette conjonctif et les mouvements de la trompe de la Bonellie (Bonellia viridis, Echiuridae). Ann Sci Nat Zool 3:203–229
Bosch C (1984) Les vaisseaux sanguins de la trompe chez Bonellia viridis (Echmrien) et leur musculature a fonction multiple. Ann Sci Nat Zool 6:3–32
Bosch C, Michel C (1979) Ultrastructural and histochemical study of the glands of the proboscis in Bonellia viridis Echiura. Cell Mol Biol 25:233–246
Fisher WK, MacGinitie GE (1928) A new echiuroid worm from California. Ann Mag Nat Hist (series 10) 1:199–204
Goto R, Sakamoto S, Hayakawa J, Seike K (2016) Underwater observations of the giant spoon worm Ikeda taenioides (Annelida: Echiura: Ikedidae) in a subtidal soft-bottom environment in northeastern Japan, which survived tsunamis of the 2011 off the Pacific Coast of Tohoku Earthquake. J Oceanogr 73:103–113. https://doi.org/10.1007/s10872-016-0380-2
Goto R, Monnington J, Sciberras M, Hirabayashi I, Rouse GW (2020) Phylogeny of Echiura updated, with a revised taxonomy to reflect their placement in Annelida as sister group to Capitellidae. Invertebr Syst 34:101–111. https://doi.org/10.1071/IS19020
Hughes DJ, Crisp DJ (1976) A further description of the echiuran Prashadus pirotansis. J Zool 180:233–242
Hughes DJ, Ansell AD, Atkinson RJA, Nickell LA, Ansell AD, Atkinson RJA, Nickell LA (1993) Underwater television observations of surface activity of the echiuran worm Maxmuelleria lankesteri (Echiura: Bonelliidae). J Nat Hist 27:219–248. https://doi.org/10.1080/00222939300770081
Ikeda I (1904) The gephyrea of Japan. J Coll Sci Imp Univ Tokyo, Jpn 18:1–87
Jaccarini V, Schembri PJ (1977a) Feeding and particle selection in the echiuran worm Bonellia viridis Rolando (Echiura: Bonelliidae). J Exp Mar Bio Ecol 28:163–181
Jaccarini V, Schembri PJ (1977b) Locomotory and other movements of the proboscis of Bonellia viridis (Echiura, Bonellidae). J Zool Lond 182:467–476
Jaccarini V, Schembri PJ (1979) The proboscis ciliation of the echiuran Bonellia viridis. J Mar Biol Assoc UK 59:377–384
Jumars PA, Dorgan KM, Lindsay SM (2015) Diet of worms emended: an update of polychaete feeding guilds. Annu Rev Mar Sci 7:497–520. https://doi.org/10.1146/annurev-marine-010814-020007
Kawaguti S (1968) Electron microscopy on blue-green algae in the body-wall of an echiuro1d Jkedosoma gogoshimense. Biol Jpn Okayairna Univ 14:67–74
Kharlamenko VI, Maiorova AS, Ermolenko EV (2018) Fatty acid composition as an indicator of the trophic position of abyssal megabenthic deposit feeders in the Kuril Basin of the Sea of Okhotsk. Deep Res Part II Top Stud Oceanogr. https://doi.org/10.1016/j.dsr2.2018.03.005
Kuznetsov PA, Maiorova AS, Temereva EN (2021) New data on echiuran anatomy and histology: the case of Lissomyema mellita (annelida: Thalassematidae). Zool. https://doi.org/10.1016/j.zool.2020.125865
Maiorova AS, Adrianov AV (2020) Biodiversity of echiurans (Echiura) of the Kuril-Kamchatka Trench area. Prog Oceanogr. https://doi.org/10.1016/j.pocean.2019.102216
Pilger JF (1977) Biology and Gametogenesis of Listriolobus pelodes (Echiura). Dissertation, University of Southern California
Pilger JF (1993) Echiura. In: Microscopic analomy of invertebrates, Volume 12: onychophora, chilopoda, and lessser protostomata. Willey-Liss Inc, pp 186–236.
Temereva EN, Kuznetsov PA, Kiseleva EA (2017) The morphology and microscopic anatomy of the deep-sea echiurid Protobonellia zenkevitchi Murina, 1976. Russ J Mar Biol 43:447–464. https://doi.org/10.1134/S1063074017060104
Vracko R (1974) Basal lamina scaffold. Anatomy and significance for maintenance of orderly tissue structure. Am J Path 77:314–346