The ultrastructure of the tegument and clamp attachment organ of Gotocotyla bivaginalis (Monogenea, polyopisthocotylea)

1993 ◽  
Vol 23 (2) ◽  
pp. 213-220 ◽  
Author(s):  
P. Ramasamy ◽  
R. Bhuvaneswari
Keyword(s):  
Attachment Organ

scholarly journals A phylogeny of Cichlidogyrus spp. (Monogenea, Dactylogyridea) clarifies a host-switch between fish families and reveals an adaptive component to attachment organ morphology of this parasite genus

2015 ◽  
Vol 8 (1) ◽  
Author(s):  
Françoise D. Messu Mandeng ◽  
Charles F. Bilong Bilong ◽  
Antoine Pariselle ◽  
Maarten P. M. Vanhove ◽  
Arnold R. Bitja Nyom ◽  
...  
Keyword(s):  
Host Switch ◽  
Attachment Organ

The Attachment and Penetration Apparatus of the Miracidium of Schistosoma

1971 ◽  
Vol 45 (2-3) ◽  
pp. 229-235 ◽  
Author(s):  
G. K. Kinoti
Keyword(s):  
Electron Microscopy ◽  
Endoplasmic Reticulum ◽  
Body Surface ◽  
Leucine Aminopeptidase ◽  
The Body ◽  
Intermediate Hosts ◽  
Free Swimming ◽  
History Of ◽  
Apical Papilla ◽  
Attachment Organ

Preliminary electron microscope observations have shown that in the miracidium of Schistosoma mattheei the surface of the apical epidermal plate consists of branching and anastomosing microvilli. It is suggested that this arboreal arrangement serves to attach the miracidium to the body surface of snail hosts during attempts to penetrate; the apical papilla can therefore be regarded as an attachment organ, functionally analogous to the suckers of the adult schistosome. It is also suggested that the degree of ‘fit’ between the attachment organ and the snail body surface may be an important factor determining the success of attempts by the miracidium to penetrate.Electron microscopy has also shown that the so-called penetration and apical glands are single flask-shaped cells. No endoplasmic reticulum and very few ribosomes were seen in these cells and it is therefore suggested that, in the mature (free-swimming) miracidium, the “glands” are not functional as such; they are simply sacs full of fluid. If they contain histolytic substances they must either have been synthesized at an earlier stage in the life history of the organism or they are synthesized elsewhere and passed into the “glands”.Histochemical attempts to identify leucine aminopeptidase and mucin in the contents of the “glands” of S. mansoni miracidia were unsuccessful. It is concluded that these substances probably do not play any role in the penetration into or attachment on snail intermediate hosts by S. mansoni miracidia.

The Structure of the Attachment Organ of Lernaeopodidae (Crustacea: Copepoda)

1972 ◽  
Vol 29 (7) ◽  
pp. 1015-1023 ◽  
Author(s):  
Z. Kabata ◽  
B. Cousens
Keyword(s):  
Phylogenetic Position ◽  
Parasitic Copepods ◽  
Attachment Organ ◽  
Freshwater Teleosts

The morphology and the anatomy of the bulla, a unique attachment organ of the parasitic copepods belonging to Lernaeopodidae (Caligoida) is described. By their anatomy the bullae can be divided into three types, associated with three groups of fishes: freshwater teleosts, marine teleosts, and elasmobranchs. The evolution of Lernaeopodidae is briefly outlined. The authors point out that the type of the bulla appears independent of the phylogenetic position of the parasite but is related only to the type of the host. It is concluded that the bulla is more than an attachment organ and that it enters into physiological association with the tissues of the fish.

scholarly journals Musculoskeletal and nervous systems of the attachment organ in three species of Diplectanum (Monogenea: Dactylogyroidea)

2017 ◽  
Vol 64 ◽  
Author(s):  
Anatoly A. Petrov ◽  
Evgenija V. Dmitrieva ◽  
Maryana P. Popyuk ◽  
Pavel I. Gerasev ◽  
Sergey A. Petrov
Keyword(s):  
Nervous Systems ◽  
Attachment Organ

scholarly journals Variasi Morfologi Holdfast Lernaea Yang Menyerang Ikan Gurami Di Jawa Timur [Morphological Variation Of Lernaea Holdfast Infest Gouramy In East Java]

2019 ◽  
Vol 6 (1) ◽  
pp. 67
Author(s):  
Kismiyati, Putri Desi Wulan Sari
Keyword(s):  
Freshwater Fish ◽  
Morphological Variation ◽  
Parasitic Diseases ◽  
Lernaea Cyprinacea ◽  
Attachment Organ

Abstract Lernaeosis is one of the parasitic diseases in freshwater fish caused by Lernaea cyprinacea. These parasites infest many freshwater fish. Identification of parasites carried by observing the morphology of holdfast as an attachment organ. This study aims to make observations on the variation of morphology of Lernaea holdfast's in East Java and the identification of Lernaea infest gouramy in East Java.

scholarly journals RHIPIDOCOTYLE CAMPANULA (DIGENEA, BUCEPHALIDAE): MUSCULAR SYSTEM, LOCALIZATION OF SEROTONIN AND NEUROPEPTIDE FMRFamide IN NERVOUS SYSTEM

2020 ◽  
pp. 276-280
Author(s):  
Nefedova ◽  
Mochalova ◽  
Terenina ◽  
Voropaeva ◽  
Movsesyan ◽  
...  
Keyword(s):  
Nervous System ◽  
Morphological Characteristics ◽  
Confocal Scanning Laser Microscopy ◽  
Muscular System ◽  
Reproductive Systems ◽  
Related Data ◽  
Confocal Scanning ◽  
Confocal Scanning Laser ◽  
Relationship Of ◽  
Attachment Organ

Trematodes of the Bucephalidae family differ from all other trematodes by the number of morphological characteristics including the structure of their attachment organ as well as the digestive and reproductive systems. In this study, the muscular system and nerve components containing serotonin and neuropeptide FMRFamid were investigated in Rhipidocotyle campanula (Bucephalidae family) from the intestine of the pike. Using immunocytochemical methods and confocal scanning laser microscopy (CSLM), data on the presence and distribution of neurotransmitters serotonin as well as the neuropeptide FMRFamide in the central and peripheral nervous system of Rh. campanula were obtained. When studying the relationship of nerve structures containing the studied neurotransmitters, muscle fibers of the muscle elements of the parasite were stained using the phalloidin associated with the fluorophore. Information on the organization of the muscular system, attachment organ, digestive and reproductive systems is given. The data obtained suggest that serotonergic and FMRF-amidergic nerve structures are involved in the regulation of the function of the attachment organ, as well as the digestive and terminal departments of the eproductive system of Rh. campanula. A comparative analysis of the obtained results and related data available in the literature for other trematodes was carried out.

Descriptions of two loxosomatids (Entoprocta), with emphasis on a relationship between symbiont attachment structures and host cuticle

2000 ◽  
Vol 78 (1) ◽  
pp. 110-120 ◽  
Author(s):  
J B Williams
Keyword(s):  
New Species ◽  
Individual Animal ◽  
Exact Location ◽  
Adhesive Disc ◽  
Short Stalk ◽  
Attachment Structures ◽  
A New Species ◽  
Attachment Organ ◽  
Single Ovary

Information is provided on a new species of Loxosomella, L. diopatricola, with unusual characteristics that is symbiotic with tubicolous polychaetes of the genus Diopatra. Plasticity is displayed in the morphology of the attachment organ: the new loxosomatid possesses a stalk terminating in either a persistent pedal gland or an enlarged adhesive disc. An individual animal develops one or other of the two stalk morphologies according to its exact location on the host and the thickness of the underlying cuticle. The host epidermis underlying individuals with an adhesive disc is, in turn, modified, suggesting that these symbionts may negatively affect their hosts. Females possessed a single ovary, nearly always on the left side. The larva lacks eyespots. Buds were borne only by males. A minute species of Loxosomella commensal on polychaetes of the genus Eunice, characterised by 6 tentacles and a very short stalk, is also described. A grooved foot is present in the bud and a pedal gland is retained in the adult. The larva apparently undergoes metamorphosis.

scholarly journals Scanning electron microscopy of acrothoracican cypris larvae (Crustacea, Thecostraca, Cirripedia, Acrothoracica, Lithoglyptidae)

1999 ◽  
Vol 68 (3) ◽  
pp. 143-160 ◽  
Author(s):  
Gregory A. Kolbasov ◽  
Jens T. Høeg ◽  
Alexei S. Elfimov
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Morphological Description ◽  
Fourth Segment ◽  
Lattice Organs ◽  
Attachment Organ ◽  
Scanning Electron

Scanning electron microscopy was used to provide a full morphological description of cypris morphologyin the acrothoracican species Lithoglyptes milis and L. habei (Lithoglyptidae).Special attention was givento lattice organs, antennules, thorax, thoracopods, abdomen, and furcal rami. Cypris larvae of the Acrothoracica share some putative plesiomorphic features with the cypris-like ascothoracid larvae of the non-cirripede taxon Ascothoracida. The most notable are traces of abdominal segmentation and carapace lattice organs without pore fields. Acrothoracican cyprids also share numerous synapomorphies with those of the Thoracica and the Rhizocephala. This list includes a four-segmented antennule with a triangular first segment of two sclerites set at an angle to each other, a cylindrical second segment, a small third segment functioning asan attachment organ, and a cylindrical fourth segment bearinghomologous sensory setae. Further apomorphies are a pair of frontolateral horn glands exiting anteroventrally on the headshield (carapace), a pair of multicellular cement glands exiting on the attachment organs, a single stout, serrated and non-natatory seta on the thoracopodal exopods and a highly reduced abdomen with at best traces of segmentation. These synapomorphies in cypris morphology supporta monophyletic taxon Cirripedia comprising the Acrothoracica, Thoracica, and Rhizocephala but excluding the Ascothoracida.

On the structure of the antennular attachment organ of the cypris larva of Balanus balanoides (L.)

1969 ◽  
Vol 256 (803) ◽  
pp. 115-134 ◽  
Keyword(s):  
Sensory Cell ◽  
The Third ◽  
Fourth Segment ◽  
Sensory Hairs ◽  
Cell Processes ◽  
Sensory Structures ◽  
Sensory Processes ◽  
Balanus Balanoides ◽  
Viscous Substance ◽  
Attachment Organ

The third segment of the antennule of the cypris larva of Balanus balanoides is modified as an attachment organ with a disk by which the cyprid attaches to submerged surfaces. The attachment disk is covered with a felt of fine cuticular villi. Opening on to the disk are terminal branches of the cement duct, numerous glands and an array of sensory hairs. The sensory structures are arthropod scolopidia with the dendrites giving rise to cilia which, distally, change to distal sensory processes. It is suggested that the cuticular hairs situated in invaginations of the cuticle around the margin of the disk function as position receptors and that the two setae lying away from the cuticle of the segment are mechanoreceptors. Three of the scolopidia have structures suiting them for chemoreception; the distal sensory processes are exposed to the exterior at the tip of the hair. Two of these hairs are positioned at the margin and one at the centre of the disk. The fourth segment, which arises from the side of the attachment organ, is packed with sensory cell processes which are associated with setae arising at the distal end; its movements are controlled by a single muscle from the third segment. A suction mechanism of adhesion is precluded as there are no structures which could effect or release suction beneath the disk. The disk could act as an adhesive pad, with the cuticular villi increasing its surface area and the antennular glands possibly secreting a viscous substance. The presence of chemoreceptors on the attachment organ indicates that a chemosensory mechanism could operate during the gregarious behaviour of settling cyprids.

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