A histological and ultrastructural study of the cells of the mantle edge of a marine bivalve, Cerastoderma edule

Richardson, Christopher A.; Runham, N. W.; Crisp, D. J.

doi:10.1016/s0040-8166(81)80008-0

Cited by 42 publications

(35 citation statements)

References 23 publications

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“…In contrast to the mantle edge gland, the outer epithelium of Nautilus pompilius shows ultrastructural characteristics reflecting a transport-active epithelium similar to the outer epithelium of marine bivalves (Neff, 1972;Richardson et al, 1981) and the septal epithelium responsible for the formation of the septa of the cuttlebone in Sepia officinalis (Wendling, 1987). The presence of large concentrations of mitochondria in the apical cytoplasm, the welldeveloped apical microvillar border, and the paucity of rough endoplasmic reticulum and Golgi complex within the outer epithelium of N. pompilius are characteristic of an ion-or water-transporting epithelium.…”

Section: Mantle Edge Gland and Shell Formationmentioning

confidence: 99%

Functional morphology of the mantle of Nautilus pompilius (Mollusca, Cephalopoda)

Westermann

Schmidtberg

Beuerlein

2005

Journal of Morphology

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This study presents histological and cytological findings on the structural differentiation of the mantle of Nautilus pompilius in order to characterize the cells that are responsible for shell formation. The lateral and front mantle edges split distally into three folds: an outer, middle, and inner fold. Within the upper part of the mantle the mantle edge is divided into two folds only; the inner fold disappears where the hood is attached to the mantle. At the base of the outer fold of the lateral and front mantle edge an endo-epithelial gland, the mantle edge gland, is localized. The gland cells are distinguished by a distinct rough endoplasmic reticulum and by numerous secretory vesicles. Furthermore, they show a strong accumulation of calcium compounds, indicating that the formation of the shell takes place in this region of the mantle. Numerous synaptic contacts between the gland cells and the axons of the nerve fibers reveal that the secretion in the area of the mantle edge gland is under nervous control. The whole mantle tissue is covered with a columnar epithelium having a microvillar border. The analyses of the outer epithelium show ultrastructural characteristics of a transport active epithelium, indicating that this region of the mantle is involved in the sclerotization of the shell. Ultrastructural findings concerning the epithelium between the outer and middle fold suggest that the periostracum is formed in this area of the mantle, as it is in other conchiferan molluscs.

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Section: Mantle Edge Gland and Shell Formationmentioning

confidence: 99%

Functional morphology of the mantle of Nautilus pompilius (Mollusca, Cephalopoda)

Westermann

Schmidtberg

Beuerlein

2005

Journal of Morphology

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“…Reduction of mantle epithelial thickness throughout the outer fold was reported for other bivalves, such as M. edulis, Cardium edule, Nucula sulcata (Bubel, 1773), and Gomphina veneriformis (Lee et al, 2007), and related to possible differences in secretory activities (Beedham, 1958). Similar to the gland cells observed in the outer mantle fold of N. nodosus, positive reaction for PAS and Alcian Blue was obtained in secretory cells from the outer fold of Pinctada fulcata (Fang et al, 2008) and Cerastoderma edule (Richardson et al, 1981), suggesting intense secretion of neutral and acid mucopolyssacharides in this region. In the extra-pallial cavity of the outer mantle fold, the calcified shell is deposited in an organic matrix formed by proteins, mucopolyssacharides, glycoproteins and lipids (Beedham, 1958;Wada, 1964;.…”

Section: Functional Ontogeny and Morphology Of The Mantle Marginsupporting

confidence: 73%

“…Mucous secretion in scallop middle fold tentacles might be associated to lubrication and cleansing of the mantle margin (a role possibly lost during eyestalk evolution), the function of velar tentacles being possibly restricted to tactile detection. In the pearl oyster Pinctada margaritifera, the number of cells with affinity to PAS and Alcian blue decreases in the tentacles from the middle mantle fold in contrast to the inner fold , a condition also observed in Cerastoderma edule (Richardson et al, 1981). Therefore, the abundance of 84 mucous-secreting cells in the tentacles of N. nodosus may represent a particular condition of Pectinidae in respect to the functional anatomy of tentacular organs.…”

Section: Discussionmentioning

confidence: 92%

“…Additionally, it has also been suggested that the products of mucous cells in this region may be concerned with mantle lubrication (Beedham, 1958;. Mantle secretory cells of P. margaritifera exhibit mucous or granular content in all three mantle folds, although the number of cells responding to PAS-Alcian blue decreases in the middle one , a condition also observed in C. edule (Richardson et al, 1981). In contrast, numerous cells secreting acid mucopolysaccharides were detected in the middle fold tentacles of N. nodosus.…”

Section: Functional Ontogeny and Morphology Of The Mantle Marginmentioning

confidence: 94%

“…In several bivalves, including scallops, the inner mantle fold and the inner pallial surface commonly display mucous cells, usually associated with ciliated cells (Richardson et al, 1981;Beninger et al, 1999;Beniner and Le Pennec, 2006). Cilia and mucocyte distribution on the inner mantle surface of N. nodosus are in accordance with previous observations on P. magellanicus, where mantle cilia are suspected not to contribute much to the water flow or particle transportation inside the mantle cavity, due to their sparse distribution (Beninger et al, 1999).…”

Section: Functional Ontogeny and Morphology Of The Mantle Marginmentioning

confidence: 99%

See 2 more Smart Citations

Anatomia e morfogênese da margem do manto da vieira Nodipecten nodosus (L. 1758) (Bivalvia: Pectinidae)

Audino¹,

Lopes²,

Marian³

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Form and function of tentacles in pteriomorphian bivalves

Audino

Marian

2019

Journal of Morphology

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Tentacles are remarkable anatomical structures in invertebrates for their diversity of form and function. In bivalves, tentacular organs are commonly associated with protective, secretory, and sensory roles. However, anatomical details are available for only a few species, rendering the diversity and evolution of bivalve tentacles still obscure. In Pteriomorphia, a clade including oysters, scallops, pearl oysters, and relatives, tentacles are abundant and diverse. We investigated tentacle anatomy in the group to understand variation, infer functions, and investigate patterns in tentacle diversity. Six species from four pteriomorphian families (Ostreidae, Pinnidae, Pteriidae, and Spondylidae) were collected and thoroughly investigated with integrative microscopy techniques, including histology, scanning electron microscopy, and confocal microscopy. Tentacles can be classified as middle fold tentacles (MFT) and inner fold tentacles (IFT) according to their position with respect to the folds of the mantle margin. While MFT morphology indicates intense secretion of mucosubstances, no evidence for secretory activity was found for IFT. However, both tentacle types have appropriate ciliary distribution and length to promote mucus transportation for cleaning and lubrication. Protective and sensory functions are discussed based on different lines of evidence, including secretion, cilia distribution, musculature, and innervation. Our results support the homology of MFT and IFT only for Pterioidea and Ostreoidea, considering their morphology, the presence of ciliated receptors at the tips, and branched innervation pattern. This is in accordance with recent phylogenetic hypotheses that support the close relationship between these superfamilies. In contrast, major structural differences indicate that MFT and IFT are probably not homologous across all pteriomorphians. By applying integrative microscopy, we were able to reveal anatomical elements that are essential for the understanding of homology and function when dealing with such superficially similar structures.

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A histological and ultrastructural study of the cells of the mantle edge of a marine bivalve, Cerastoderma edule

Cited by 42 publications

References 23 publications

Functional morphology of the mantle of Nautilus pompilius (Mollusca, Cephalopoda)

Functional morphology of the mantle of Nautilus pompilius (Mollusca, Cephalopoda)

Anatomia e morfogênese da margem do manto da vieira Nodipecten nodosus (L. 1758) (Bivalvia: Pectinidae)

Form and function of tentacles in pteriomorphian bivalves

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