Branchotenthes Robinoverstreeti N. Gen. And N. Sp. (Monogenea: Hexabothriidae) From Gill Filaments of the Bowmouth Guitarfish, Rhina Ancylostoma (Rhynchobatidae), in the Indian Ocean

Bullard, Stephen A.; Dippenaar, Susan M.

doi:10.1645/0022-3395(2003)089[0595:brngan]2.0.co;2

Cited by 19 publications

(28 citation statements)

References 7 publications

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“…Of the must often uses keys, that of Yamaguti (1963) is outdated because it does not include the taxa described since that time and his systematic arrangement differs from current hypotheses. The more recent key of Bullard & Dippenaar (2003) is consistent with current hypotheses but lack taxa because there was insufficient morphological information or because they were described more recently. The key of Yamaguti (1963) lacks eight more recently described genera and the other two keys lacked two genera, one for lack of information and one because it was described more recently than those publications (BOEGER & KRITSKY, 1989;BULLARD & DIPPENAAR, 2003).…”

Section: Remarks and Discussionsupporting

confidence: 60%

“…Bullard & Dippenaar (2003), building upon information summarized by Boeger & Kritsky (1989), furnished a key that distinguished Neonchocotyle from all other hexabothriids by the presence of an asymmetrical haptor, appendix originating from dorsal surface of haptor, sclerites not equally sized, and prostatic region present. These characters, except for the inequality in the size of the sclerites, are present in the specimens that we collected in Mexico, so we have assigned the new species to this genus.…”

Section: Remarks and Discussionmentioning

confidence: 99%

“…An example is the use of vasa efferentia to refer to ducts that carry sperm from the testis. The structure that carries sperm from testis in every species of monogenean (the vas efferens) is homologous a should be referred to by the same name even though its derived form is a dilated, glandular-wall (BULLARD & DIPPENAAR, 2003) or it is a thin non-glandular wall (GLENNON et al, 2005). Theses are forms (thing walled, glandular, or looped) of the same homologous structure, so they should be referred to by the same name (vas efferens).…”

Section: Remarks and Discussionmentioning

confidence: 99%

“…Pristonchocotyle was excluded in the systematic treatments of Boeger & Kritsky (1989) and Bullard & Dippenaar (2003), perhaps because the description of its type species P. intermedia Watson & Thorson, 1976 was incomplete. For example, in the figures of that paper (WATSON & THORSON, 1976) it is not clear whether the haptor is symmetrical or asymmetrical and we were not able to study the slides and review this character.…”

Section: Remarks and Discussionmentioning

confidence: 99%

“…Statistical analysis of variance (ANOVA) was used to assess differences in the sizes of suckers and sclerites, respectively, of the new species. Helminths were identified using existing taxonomic keys and published literature (PRICE, 1942;YAMAGUTI, 1963;KTARI & MAILLARD, 1972;EUZET & MAILLARD, 1974;BOEGER & KRITSKY, 1989;BULLARD & DIPPENAAR, 2003 …”

Section: Methodsmentioning

confidence: 99%

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Neonchocotyle violantei n. sp. (Monogenea, Hexabothriidae) from Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) of Yucatán, Gulf of Mexico

Quiterio-Rendon

Monks

Pulido-Flores

2018

Rev. Bras. Parasitol. Vet.

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Neonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infects the gill of the Atlantic guitarfish, Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) from littoral waters of Celestún, Yucatán, Mexico. It is assigned to Neonchocotyle because it has, among other features, an asymmetrical haptor, a seminal receptacle, a smooth oötype, and an egg with two elongate filaments. It differs from Neonchocotyle pastinacae, the only congener, by having a small body (821 long by 315 wide, length to width = 2.6:1), two pairs of microhooks between the haptoral appendix suckers, extracaecal (submarginal) vaginal pores, and 5-9 testes. This is the first record of a species of Neonchocotyle in the Gulf of Mexico, the first monogenean reported from P. lentiginosus in Mexico and the second species of Hexabothriidae reported from Mexico.Keywords: Neonchocotyle sp. n., Pseudobatos lentiginosus, helminth, key. ResumoNeonchocotyle violantei n. sp. (Monogenea: Hexabothriidae) infecta brânquia de Pseudobatos lentiginosus, (Rhinopristiformes, Rhinobatidae) de águas litorâneas ao largo da costa de Celestún, Yucatán, México. É atribuído a Neonchocotyle porque tem, entre outras características, um haptor assimétrico, um receptáculo seminal, um tipo oótipo liso e um ovo com dois filamentos alongados. Difere de Neonchocotyle pastinacae, o único congênere, por ter um corpo pequeno (821 de comprimento por 315 de largura, comprimento a largura = 2,6: 1), dois pares de microganchos entre as ventosas do apêndice haptoral, poros vaginais extracaecais (submarginal) e 5-9 testículos. Este é o primeiro registro de uma espécie de Neonchocotyle no Golfo do México, o primeiro monogenético registrado em P. lentiginosus no México e a segunda espécie de Hexabothriidae relatada no México.Paravras-chave: Neonchocotyle sp. n., Pseudobatos lentiginosus, helminto, chave.

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Section: Remarks and Discussionsupporting

confidence: 60%

Section: Remarks and Discussionmentioning

confidence: 99%

Section: Remarks and Discussionmentioning

confidence: 99%

Section: Remarks and Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Neonchocotyle violantei n. sp. (Monogenea, Hexabothriidae) from Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) of Yucatán, Gulf of Mexico

Quiterio-Rendon

Monks

Pulido-Flores

2018

Rev. Bras. Parasitol. Vet.

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The surface topography of Callorhynchocotyle callorhynchi (Manter, 1955) (Monogenea: Hexabothriidae), a parasite of the holocephalan fish Callorhinchus capensis

2015

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A scanning electron microscopical study, incorporating some transmission electron microscopical observations, was undertaken on the surface topography of the gill parasite Callorhynchocotyle callorhynchi (Manter, 1955) (Monogenea: Hexabothriidae) from the Cape elephant fish Callorhinchus capensis (Holocephali) off the western coast of South Africa. The study revealed the presence of several new characteristics for this species. These include the presence of regularly distributed, knob-shaped projections on the surface of the haptor, haptoral appendix and sucker peduncles measuring 0.2 μm and in concentrations of approximately 100 per 10 μm(2) and the existence of a ridge which bisects each sucker lumen, forming two different loculi. We also report, for the first time for any monogenean, the presence of 'true spines'; these occur on the luminal surface of the haptoral suckers and have all of the characteristics of the tegumental spines of digeneans, i.e. they are situated within the distal syncytial tegumental cytoplasm, rest on the basal plasma membrane, have a uniform structure and are covered apically by the tegumental surface plasma membrane. These spines are simple, straight and single-pointed. Under the scanning electron microscopy (SEM), within an area of 20 μm in diameter, 23 such spines were counted, but their concentration and arrangement varies in different regions of the sucker. At their base, they measure about 1.5 μm in width and reach approximately 2 μm in height above the general level of the tegument, but transmission electron microscopy (TEM) measurements of an entire spine indicate that they may reach 3 μm in total length. The presence of spines, possessing similar morphological characteristics in both basal polyopisthocotylean monogeneans and digeneans, represents another characteristic which may prove useful in understanding the evolutionary relationships within the Neodermata.

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Ultrastructural observations of the attachment organs of the monogenean Rajonchocotyle emarginata (Olsson, 1876) (Polyopisthocotylea: Hexabothriidae), a gill parasite of rays

2016

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The present study uses scanning and transmission electron microscopical observations to examine the haptoral features of the hexabothriid polyopisthocotylean monogenean Rajonchocotyle emarginata from the gills of the elasmobranch Amblyraja radiata. The haptor possesses six equal, pedunculate suckers, each armed with a large, curved, hooked sclerite, and an appendix bearing two small, terminal suckers and a pair of minute hamuli. The outer side of the distal region of the hooked sclerite forms a large bulge along the antero-lateral side of each sucker and the proximal region forms a small bulge on the opposite postero-lateral side; part of the large bulge, which covers the small sclerite hook, surmounts the sucker rim. The sucker sclerite is situated outside the main sucker muscle complex of the sucker wall and is surrounded by its own muscular envelope; close to the sclerite itself, long, tightly packed lamella-like processes of sarcoplasm are present. A muscular sphincter surrounds the distal region of the sclerite shaft. The sclerite consists of three heterogeneous layers, but its hook region is distinguished from the shaft by the presence of an additional homogeneous layer. Hamuli within the appendix consist of three distinct layers loosely surrounded by sarcoplasmic lamellae. The luminal surface of the appendicular suckers is covered with unusual, long, thin, interconnected surface protrusions. In all other regions of the haptor, the tegumental surface is smooth, with numerous shallow pores penetrating the "terminal web" of the syncytial cytoplasm. Unicellular gland cells are localized close to the base of the appendix, with their ducts, containing non-homogenous secretory bodies, opening onto the anterior haptoral surface. Two types of sense receptors are visible on the haptoral surface. The ultrastructural features of the haptor are discussed in relation to our understanding of their function and the evolutionary relationships of the basal polyopisthocotylean monogenean groups Hexabothriidae and Chimaericolidae.

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Branchotenthes Robinoverstreeti N. Gen. And N. Sp. (Monogenea: Hexabothriidae) From Gill Filaments of the Bowmouth Guitarfish, Rhina Ancylostoma (Rhynchobatidae), in the Indian Ocean

Cited by 19 publications

References 7 publications

Neonchocotyle violantei n. sp. (Monogenea, Hexabothriidae) from Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) of Yucatán, Gulf of Mexico

Neonchocotyle violantei n. sp. (Monogenea, Hexabothriidae) from Pseudobatos lentiginosus (Rhinopristiformes, Rhinobatidae) of Yucatán, Gulf of Mexico

The surface topography of Callorhynchocotyle callorhynchi (Manter, 1955) (Monogenea: Hexabothriidae), a parasite of the holocephalan fish Callorhinchus capensis

Ultrastructural observations of the attachment organs of the monogenean Rajonchocotyle emarginata (Olsson, 1876) (Polyopisthocotylea: Hexabothriidae), a gill parasite of rays

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