Comparative Study of the Tegumental Surface of Several Species of Gorgoderina Looss, 1902 (Digenea: Gorgoderidae), as Revealed by Scanning Electron Microscopy

Mata-López, Rosario; León‐Régàgnon, Virginia

doi:10.1654/4186.1

Cited by 24 publications

(14 citation statements)

References 20 publications

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“…In this study, tegument of the rim of the oral sucker was smooth and had two types of papillae, domed and rosette. Mata-Lopez and Leon-Regagnon (2006) found rosette papillae only around the ventral sucker of Gorgoderina spp. Meanwhile, around the oral sucker, tegument was covered with sharp, pointed spines and groups of rosette papillae, while there were fewer rosette papillae inside the oral sucker, and no spines were seen.…”

Section: Discussionmentioning

confidence: 96%

Tegumental ultrastructure of adult Quinqueserialis quinqueserialis (Trematoda: Notocotylidae): an intestinal parasite of muskrat (Ondatra zibethicus)

Naem

Smythe

2015

Parasitol Res

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Ten adult Quinqueserialis quinqueserialis specimens were removed from the intestine of a naturally infected muskrat, and scanning electron microscopy was used to study the morphological characteristics of the trematodes. The mature trematode, which was easy to recognize by the monostome holdfast organ, with no anterior cone, measured 2200-2500 μm in length by 900-1050 μm in width. The body was elongated and tapering at the anterior end, but the posterior end was rounded, and in some specimens was slightly truncated. The mouth opening lay at the anterior end and was surrounded by the oral sucker, which was round, small to medium in size, and subterminal. The tegument of the rim and inside of the oral sucker was smooth and had two types of papillae, domed and rosette papillae. Around the oral sucker, tegument was covered with sharp, pointed spines. The common genital pore was located on the median line of the body, posterior to the oral sucker. The cirrus had smooth tegument at the base and was armed with numerous conical spines throughout its length. The ventral surface was concave and provided with five distinct longitudinal rows of ventral papillae, which extended from the anterior to the posterior end of the body. Each row consisted of 15 to 20 papillae, making 81 to 88 papillae in all. These papillae were variable in size. In most specimens, the papillae were simple knob-like structures, but in some cases, they appeared to be bi-or trifurcate. The tegument at the base of each ventral papilla showed minute spiny pattern, but it was smooth or folded on top and had small rosette and ciliated papillae. Tegument at the edges of the worm was smooth in the mid-parts, spiny on lateral parts, and included rosette papillae. The dorsal surface of the worm was smooth and slightly convex, and the tegument was provided with two large domed papillae in one third of the anterior end of the dorsal part, few thick spines in the mid-part, and excretory pore at the level just posterior to the end. No spines or papillae were seen around the excretory pore.

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Section: Discussionmentioning

confidence: 96%

Tegumental ultrastructure of adult Quinqueserialis quinqueserialis (Trematoda: Notocotylidae): an intestinal parasite of muskrat (Ondatra zibethicus)

Naem

Smythe

2015

Parasitol Res

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“…Sensory receptors are common among digeneans and have been examined in various species such as B. anguillae (Filippi et al,2010), Clonorchis sinensis (Fujino et al,1979a), Cryptocotyle lingua (Køie,1977), F. hepatica (Bennett,1975b), Gorgoderina vitelliloba (Hoole and Mitchell,1981), and H. continua (Hong et al,1991). However, among Digenea, intra‐tegumental (or non‐ciliated) sensory structures have been observed using SEM or TEM in adults of Brachylaimus aequans (Žd'árská et al,1990; Žd'árská,1993), C. sinensis (Fujino et al,1979a), Echinostoma paraensei (Maldonado et al,2001), F. hepatica (Bennett,1975b), G. attenuata and G. bilobata (Mata‐López and Leon‐Regagnon,2006), G. vitelliloba (Hoole and Mitchell,1981), Hasstilesia tricolor (Crites and Jilek,1981), Heterophyes nocens (Chai et al,1992), H. continua (Hong et al,1991), Himasthla alincia (Han et al,2003), Karyakartia egyptensis (Abdou,2008), Leucochloridium sp. (Bakke,1976), Metagonimus miyatai (Chai et al,1998), M. takahashii (Chai et al,2000), Nicolla skrajbini (Moravec,2009), Paragonimus westermani (Choi and Yoo,1985), Philophthalmus megalurus (Edwards et al,1977), Pygidiopsis summa (Chai et al,2002), and Transversotrema licinum (Abdul‐Salam and Sreelatha,1992).…”

Section: Discussionmentioning

confidence: 99%

“…It may also be involved in ion regulation and osmoregulation (Threadgold,1984), which makes it a tissue with complex functions (Roberts and Janovy,2000). Detailed studies on the ultrastructural characteristics of digeneans can provide also useful information for the taxonomic analysis of the groups (Mata‐López and Leon‐Regagnon,2006).…”

Section: Introductionmentioning

confidence: 99%

Topography and ultrastructure of the tegument of Lecithochirium musculus (digenea: Hemiuridae), a parasite of the European eel Anguilla anguilla (osteichthyes: Anguillidae)

Filippi

Quilichini

Foata

et al. 2011

Journal of Morphology

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The tegumental ultrastructure of the stomach fluke Lecithochirium musculus was studied using scanning and transmission electron microscopy. The surface of the tegument was smooth and covered by transverse cytoplasmic ridges. Cobblestone-like units of the tegument were observed on the ventral surface. Invagination and evagination of the ecsoma induced variations in the tegumental surface. The ultrastructural study revealed that the tegument of L. musculus had a typical syncytial organization with a distal cytoplasm lying over a basal matrix and cytons. Two types of intra-tegumental sensory structures were observed. Type 1 sensory receptor was a domed-like fusiform structure consisting of a smooth elevation of the tegument. Four receptors of this type were observed on the anterior dorsal surface of the fluke. Three nerve bulbs filled with electron-lucent material and mitochondria composed this receptor. Hemispherical electron-dense collars were observed at the top of the nerve bulbs. Striated rootlets laid just beneath the hemispherical electron-dense collars. Type 2 sensory receptor presented two morphological variations, i.e., a bulb-like monolobed structure, and a bulb-like bilobed structure observed at two different degrees of evagination. For both variations, the nerve bulb enclosed mitochondria, electron-lucent material, and a conical electron-dense collar from which extended a striated rootlet. Numerous sensory receptors of this type were observed around the ventral sucker.

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Section: Fine Structure Of Body Surfacementioning

confidence: 99%

“…This character has often been used for their classification (Eduardo 1982(Eduardo , 1984Mata-Lopez and Leon-Regagnon 2006). Up to 4 types of papillae (button, ciliated, rosette, and domed papillae) were described by Hoole and Mitchell (1981), Bakke and Hoole (1988) and Mata-Lopez and Leon-Regagnon (2006) in various trematodes based on their shape. Eduardo (1982) emphasized the role of papillae in taxonomy and described up to 6 different types of papillae in paramphistomids (dome to conical non-ciliated papillae, dome to conical ciliated papillae, short and stumpy papillae covered by hair-like processes, long non-branching and non-ciliated papillae, long papillae with simple uniciliated branches, and long papillae with bulb-like multiciliated branches).…”

Section: Fine Structure Of Body Surfacementioning

confidence: 99%

Taxonomic tools for the identification of Allogenarchopsis bareilliensis n. sp. (Digenea: Hemiuroidea: Derogenidae) from Channa striata of Rohilkhand, India based on light and scanning electron microscopic studies

Gupta

Gupta²,

Urabe

2016

J Parasit Dis

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The stomach of the freshwater snakehead murrel, Channa striata (n = 250) collected from fresh water habitats of Bareilly, Uttar Pradesh, India revealed Allogenarchopsis, a trematode parasite (Plagiorchiida: Derogenidae). An illustrated account of light (Olympus BX-53 with Cellsens software imaging system) and scanning electron microscopy (SEM) (Neo JCM-6000) of Allogenarchopsis bareilliensis n. sp. (prevalence 37 %, intensity 1-4 par/host) is provided. Light microscopy based studies warranting creation of a new species are the robust shape of the body with broad mid-body, blunt anterior and tapering posterior end, large ventral sucker, ratio of oral sucker: ventral sucker 1:3.5, pharynx broader than long, egg size small with relatively short egg filament, excretory vesicle U-shaped bifurcating at posterior end and terminating above intestinal shoulders. Key characteristics of the tegumental microtopography by SEM are (1) an aspinous tegument with a variety of papillae of different shapes (button-like, dome-shaped) distributed randomly on the dorsal and ventral surface (2) oral sucker and oral cavity muscular with fringed margins and morphologically different oral papillae (3) lip of ventral sucker papillated including two unequally spaced rows of papillae with sensory receptacles interspersed in between, (4) unique differentially texturized cytoplasmic processes on the ventral sucker and (5) body folds grooved, gradually becoming narrower towards posterior end. This is the first record and study on Allogenarchopsis from Channa of Rohilkhand, India using electron optics. We recommend that the newly recognized morphological features as revealed by light microscopy and SEM be utilized as taxonomic tools in future for the identification of the species.

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Comparative Study of the Tegumental Surface of Several Species of Gorgoderina Looss, 1902 (Digenea: Gorgoderidae), as Revealed by Scanning Electron Microscopy

Cited by 24 publications

References 20 publications

Tegumental ultrastructure of adult Quinqueserialis quinqueserialis (Trematoda: Notocotylidae): an intestinal parasite of muskrat (Ondatra zibethicus)

Tegumental ultrastructure of adult Quinqueserialis quinqueserialis (Trematoda: Notocotylidae): an intestinal parasite of muskrat (Ondatra zibethicus)

Topography and ultrastructure of the tegument of Lecithochirium musculus (digenea: Hemiuridae), a parasite of the European eel Anguilla anguilla (osteichthyes: Anguillidae)

Taxonomic tools for the identification of Allogenarchopsis bareilliensis n. sp. (Digenea: Hemiuroidea: Derogenidae) from Channa striata of Rohilkhand, India based on light and scanning electron microscopic studies

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