The internal morphology and histology of adult <i>Caloglyphus mycophagus</i> (Mégnin) (Acarina: Acaridae)

Kuo, Jon Son; Nesbitt, H.H.J.

doi:10.1139/z70-086

Cited by 16 publications

(6 citation statements)

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“…Therefore, we expect that S and D cells play similar roles in all species. In contrast, three cell types were distinguished by Kuo and Nesbitt (1970) in C. mycophagus; since their work was based on optical microscopy only, comparisons with our results are not feasible.…”

Section: Midgutcontrasting

confidence: 77%

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Ultrastructure of the digestive tract in Acarus siro (Acari: Acaridida)

Šobotník

Alberti

Weyda

et al. 2007

Journal of Morphology

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The gut of the mite Acarus siro is characterized on the ultrastructural level. It consists of the foregut (pharynx, esophagus), midgut (ventriculus, caeca, colon, intercolon, postcolonic diverticula, postcolon), and hindgut (anal atrium). The gut wall is formed by a singlelayered epithelium; only regenerative cells are located basally and these have no contact with the lumen. Eight cell types form the whole gut: (i) simple epithelial cells forming fore-and hindgut; (ii) cells that probably produce the peritrophic membrane; (iii) regenerative cells occurring in the ventriculus, caeca, colon, and intercolon; (iv) spherite cells and (v) digestive cells forming the ventriculus and caeca; (vi) colonic cells and (vii) intercolonic cells; and (viii) cells forming the walls of postcolonic diverticula and postcolon. Spherite and digestive cells change in structure during secretory cycles, which are described and discussed. The cycle of spherite, colonic, and intercolonic cells is terminated by apoptosis. Ingested food is packed into a food bolus surrounded by a single homogeneous peritrophic membrane formed by addition of lamellae that subsequently fuse together. The postcolonic diverticula serve as a shelter for filamentous bacteria, which also are abundant in the intercolon.

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Section: Midgutcontrasting

confidence: 77%

“…Rhizoglyphus robini, R. echinopus, and Tyrophagus infestans (Prasse, 1967;Rohde and Oemick, 1967;Kuo and Nesbitt, 1970;Akimov, 1985;Baker and Krantz, 1985). The fore-and hindgut are equipped with a multilayered cuticle and are thus likely of ectodermal origin.…”

Section: General Remarksmentioning

confidence: 99%

Ultrastructure of the digestive tract in Acarus siro (Acari: Acaridida)

Šobotník

Alberti

Weyda

et al. 2007

Journal of Morphology

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“…Two identical accessory glands opening into the common oviduct, previously reported inA. siro and some other species (Kuo and Nesbitt, 1970;Baker and Krantz, 1985;Witalifiski et al, 1990) are missing in light of recent studies (Witalifiski and Walzl, 1993, unpublished).…”

Section: Female Reproductive Systems In Acaridida Under Stud)mentioning

confidence: 87%

Egg shells in mites: vitelline envelope and chorion in Acaridida (Acari)

Witaliński

1993

Exp Appl Acarol

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Witalifiski, W., 1993. Egg shells in mites: vitelline envelope and chorion in Acaridida (Acari). Exp.Appl. Acarol., 17: 321-.344.This study deals with the formation of vitelline envelope (VE) and chonon compartments in several free living and parasitic acaridid mites. In all investigated mites, the VE is of primary origin (produced by oocyte itself), whereas exochorion material is of tertiary, origin (oviduct or chorion gland .secretion).In acarid mites Acarus siro and Tyrophagus perniciosus, VE formation starts with the oviductal oocytes in which vitellogenesis already proceeds. It is characterized by stratification (Acarus) or coarse fibrillar texture (Tyrophag~). Oocyte microvilli penetrating VE material were not observed. When the vitellogenesis terminates, VE becomes homogeneous and is transformed into chorion. This is the only layer protecting the deposited egg in A. siro, whereas in T. perniciosus the chorion-coated eggs passing through the distal portion of the oviduct are additionally covered by exochorion material deposited in three distinct forms: dense patches, granules, and most conspicuous tocular chambers.In Tyrophagus longior, the egg surface closely resembles that of T. perniciosus, but the locular chambers are smaller. In Aleuroglyphus ovatus the exochorion material forms tiny spherical patches instead of locnlar chambers.In Sarcoptes scabiei, Notoedres cati and Falculifer rostratus, flocculent VE appears on vitellogenic oocytes in the oviduct. VE development is characterized by formation of numerous lenticular perivitelline spaces, which initially grow to disappear later. Then VE material transforms into fully homogeneous chorion. Chorion glands in Sarcoptes and Notoedres produce multivesicular secretory bodies; their content is released onto the egg surface to form a vesicular monolayer (exochorion) during the egg passage. The chorion gland in Falculifer is composed of two secretory cell types. Its secretion possibly glues the eggs to the host feather barb during highly ordered deposition, and forms the appendage ending with a fibbed plate, here considered to be a print of female undulate lamina acting as an ovipositor. The hatching suture is present. Neither distinct micropyle nor aeropyles have been found in eggs of species under study.The exochorion is proposed to be an adhesive layer which fixes the eggs to the substratum. The same role plays the chorion gland secretion in F. rostrat~. It can be argued, however, that locular chambers of Tyrophagus exochorion may participate in reduction of water loss rather than in egg adherence or plastron respiration, as previously suggested in the literature.

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“…Although not supported by molecular data (Domes et al, 2007), there is strong morphological and chemical evidence that the pedomorphic, mostly soft-bodied mite suborder Astigmata (Acar-idida) was derived from within oribatid mites, and the family of Archegozetes, Trhypochthoniidae, include possible close relatives of this suborder (Norton, 1998 and cited references). Three paired muscles were tracked to insert on the valves of the anus of a common species of the astigmatan Sancassania (5Caloglypus) by Kuo and Nesbitt (1970). Although homologies are not certain, one pair has a dorsal origin and may be our poam.…”

Section: Comparisons With Differently Structured Oribatid Mitesmentioning

confidence: 99%

Role of musculature during defecation in a particle‐feeding arachnid, Archegozetes longisetosus (Acari, Oribatida)

Heethoff

Norton

2008

Journal of Morphology

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Most extant Chelicerata are characterized by external digestion and the ingestion of fluid food. Exceptions include the marine taxa, most Opiliones, and the mite groups Opilioacarida (Parasitiformes) and Sarcoptiformes (Acariformes), which ingest particulate food. This leads to different physiological and morphological adaptations for food processing, including the production and extrusion of solid fecal pellets, which are rather large in sarcoptiform mites. Few studies have investigated the defecation of such large fecal pellets, and available information is contradictory. We use a combination of non invasive microscopical techniques and in vivo examination to investigate the complex functional morphology of the anal region of the oribatid mite Archegozetes longisetosus Aoki. The opening of the anus is at least initiated by indirect muscular action via an increase of hemolymph pressure, through the action of dorsoventral muscles (dvm). Extrusion of the fecal pellet is accomplished by the prerectal muscle collar, with full opening of the anus and rotation and bowing of the plates probably resulting from pressure of the pellet. The sequential nature of these actions was demonstrated by many observations in which the anus opened only partially; these were concomitant with dmv contraction but pellets were not being extruded. All muscles directly connected to the anal and adanal regions assist in keeping the anus closed; they are antagonists to hydrostatic forces that are necessary for normal activity. Based on the literature, no obvious similarities were noted with defecation musculature in other particle-feeding chelicerates, but most muscles can be homologized with those of more specialized oribatid mites. The function of the outer anal muscles has been modified in both Euphthiracaridae and Brachypylina to assist in providing general hemolymph pressure.

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The internal morphology and histology of adult Caloglyphus mycophagus (Mégnin) (Acarina: Acaridae)

Cited by 16 publications

References 0 publications

Ultrastructure of the digestive tract in Acarus siro (Acari: Acaridida)

Ultrastructure of the digestive tract in Acarus siro (Acari: Acaridida)

Egg shells in mites: vitelline envelope and chorion in Acaridida (Acari)

Role of musculature during defecation in a particle‐feeding arachnid, Archegozetes longisetosus (Acari, Oribatida)

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