Ultrastructure and functional morphology of dermal glands in the freshwater mite Limnochares aquatica (L., 1758) (Acariformes, Limnocharidae)

Shatrov, Andrew B.; Soldatenko, E.V.; Stolbov, Vitaly A.; Smirnov, Peter A.; Petukhova, Olga

doi:10.1016/j.asd.2018.11.010

Cited by 8 publications

(9 citation statements)

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“…The idiosomal glands occupy the same location within the body and reveal, as usual, a relatively thin epithelium filled with RER cisterns (Shatrov, 2008). However, in contrast with However, in the early-derived water mite Limnochares aquatica (L., 1758) belonging to the superfamily Eylaoidea of the clade Protohydrachnidia (Dabert et al, 2016), only one type of the highly specialized numerous dermal glands is present (Shatrov et al, 2019). These glands cannot be compared by their ultrastructural organization and structure of the excretory openings (glandularia) with those of other water mites studied so far and are expected to be a type of the excretory system.…”

Section: Morphology and Ultrastructurementioning

confidence: 96%

“…The second assumption from our investigation is that it is impossible to judge about homology of glandularia and, especially, glands only by their position without knowledge on their internal organization. (Shatrov, 2008(Shatrov, , 2013Shatrov et al, 2019;. Besides Thor (1902), Schmidt (1935) has described the light microscopic histology of dermal glands in several water mite species, including L. maculata with suggestions on their functions.…”

Section: Anatomymentioning

confidence: 99%

“…The same functions may be attributed to numerous dermal glands of L. aquatica, which supposedly accumulate peculiar substances from the peripheral body volume in large vacuoles in the form of dense granular material. This material is probably synthesized from precursors migrating across the gland wall (Shatrov et al, 2019).…”

Section: Morphology and Ultrastructurementioning

confidence: 99%

“…Only recently dermal glands of different water mites' species have been studied electron-microscopically (Shatrov, 2008(Shatrov, , 2013Shatrov et al, 2019;Smit & Alberti, 2009) and the production of the peculiar silk-like tubes/threads by dermal glands as a new form of arthropod silk was discovered (Shatrov et al, 2014;.…”

Section: Introductionmentioning

confidence: 99%

“…The glands reveal a quite complex morphological organization different in different water mite species. By contrast, the early-derived Limnochares aquatica (L., 1758) (Eylaioidea) shows an irregular number of dermal glands of only one type with varying organization depended on their functional activity (Shatrov et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Organization of dermal glands and characteristic of secretion in the freshwater mite, Limnesia maculata (O. F. Müller, 1776) (Acariformes, Limnesiidae)

Shatrov

Soldatenko

2022

Journal of Morphology

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The presence of dermal glands is a synapomorphy in the freshwater mites-the large branch of the hyporder Parasitengonina. Dermal glands of the mite Limnesia maculata (O. F. Müller, 1776) (Acariformes, Limnesiidae) were studied using light and electron microscopy (TEM and SEM) for the first time. Two types of dermal glands were recognized in adult mites-14 pairs of the uniformly organized common dermal glands scattered throughout the entire body volume, and one pair of the characteristic socalled idiosomal dermal glands centrally located and stretched along the ventral body wall, supposedly corresponding to the epimeroglandularia 4. The common dermal glands are composed of a single large alveolus with the basally located columnar epithelium. An intra-alveolar lumen is positioned above the epithelium and packed with a secretion in the form of long curved electron-dense bands. These bands are directed to the excretory opening and released to the outside in the form of strongly coiled bands. The cytoplasm of the common dermal glands is filled with short RER cisterns and shows few characteristic Golgi bodies with round dense secretory granules at the distal pole. In contrast, a large elongated sac represents the idiosomal dermal glands having a relatively thin secretory epithelium on the periphery. The cuboidal epithelial cells contain areas with tightly packed RER cisterns and weakly recognized Golgi bodies. The apical cell surface bears irregular short microvilli. The large intra-alveolar lumen always contains an electron-dense secretion with myriads of small lighter particles. This kind of secretion was never seen released through the opening. The excretory opening of the common and the idiosomal dermal glands shows differences in its organization but basically is represented by a cuticular "bell" narrowing to the opening and showing a particular kind of valves at the inner side of the flaps of the orifice.

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Section: Morphology and Ultrastructurementioning

confidence: 96%

Section: Anatomymentioning

confidence: 99%

Section: Morphology and Ultrastructurementioning

confidence: 99%