Comparative Morphology of the North American Species of Spinitectus (Nematoda: Spirurida) Analyzed by Scanning Electron Microscopy

Jilek, Reid; Crites, John L.

doi:10.2307/3225764

Cited by 16 publications

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“…The general morphology (especially the structure of cephalic end and the spination of body) and measurements of the single available female specimen from Albula glossodonta are very similar to those of Spinitectus beaveri Overstreet, 1970, a stomach parasite of Albula vulpes (Linnaeus) in Florida (Biscayne Bay), USA (Overstreet 1970, Jilek andCrites 1982). Since the hosts of both forms belong to the same fish genus, it is apparent that both of them are closely related or even conspecific.…”

Section: Commentsmentioning

confidence: 75%

“…specimen from New Caledonia. Jilek and Crites (1982) studied by SEM the cephalic structure of S. beaveri and found it very different from those of the three other, freshwater North American species of Spinitectus examined, especially in the shape of the oral aperture and highly reduced pseudolabia. However, in fact, by this structure S. beaveri differs from all other congeneric species hitherto studied by SEM.…”

Section: Commentsmentioning

confidence: 88%

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Two cystidicolids (Nematoda, Cystidicolidae) from marine fishes off New Caledonia

Moravec

Justine

2009

Acta Parasitologica

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Two nematode species of the family Cystidicolidae were collected from the digestive tract of marine fishes off New Caledonia, South Pacific: Ascarophis adioryx Machida, 1981 from the stomach of the speckled squirrelfish Sargocentron spiniferum and the sabre squirrelfish Neoniphon sammara (new host record) (both Holocentridae, Beryciformes), and a Spinitectus sp. female, morphologically similar to S. beaveri Overstreet, 1970, from the roundjaw bonefish Albula glossodonta (Albulidae, Albuliformes). Based on light and scanning electron microscopy examinations, A. adioryx is redescribed and a new subgenus Dentiascarophis subgen. nov., characterized by the presence of one dorsal and one ventral median protrusions in the mouth, is established to accommodate it; a key to subgenera of Ascarophis is provided. Ascarophis holocentri Parukhin, 1984 is considered a junior synonym of A. adioryx. The cephalic structure of Spinitectus sp. and S. beaveri is very different from those in other congeners and, therefore, a new subgenus Paraspinitectus subgen. nov., characterized by highly reduced pseudolabia, is erected to accommodate these species. The hemiurid digenean Lecithochirium cirrhiti (Manter et Pritchard, 1960)

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Section: Commentsmentioning

confidence: 75%

Section: Commentsmentioning

confidence: 88%

Two cystidicolids (Nematoda, Cystidicolidae) from marine fishes off New Caledonia

Moravec

Justine

2009

Acta Parasitologica

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“…Taking the cystidicolid genus Spinitectus as an example, Jilek & Crites (1982c) pointed out that some workers have omitted descriptive details of the head or have provided incomplete or misleading en face drawings. Scanning electron microscopy (SEM) may provide accurate representations of nematode head anatomy, tail anatomy and cuticular ornamentation but this technology is not readily available to field workers for whom this Guide is mainly intended.…”

Section: Collection and Examination Of Nematodesmentioning

confidence: 99%

Guide to the Parasites of Fishes of Canada Part V: Nematoda

Arai

Smith

2016

Zootaxa

605

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Keys are provided for the identification of the nematode species known to be parasites of Canadian fishes. The nematodes are described and illustrated, with a note of the site(s) they occupy in named fish host(s) and their geographical distribution. Parasite records are given by author and date, full details of which can be found in a bibliography of over 800 references. Diagnoses and keys for 22 Families, 47 genera and 88 species of nematodes are also given, together with a glossary of terms, a host-parasite list, and indices to both nematode parasites and hosts.

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“…It is most similar to S. micracanthus and S. carolini in possessing a relatively long stoma, a posteriorly directed vagina, a right spicule with a terminal ventral barb, and a heart-shaped caudal mucron (Christian, 1972;Choudhury and Dick, 2001). How- ever, S. macrospinosus can be readily distinguished from its North American congeners primarily by the arrangement and large size of its spines (see Mueller and Van Cleave, 1932;Christian, 1972;Jilek and Crites, 1982;Choudhury and Dick, 1992;Caspeta-Mandujano and Moravec, 2000;Caspeta-Mandujano et al, 2000;Choudhury and Pérez-Ponce de León, 2001 for comparison). It is easily distinguished from S. micracanthus and S. carolini by the size and arrangement of its spines and the position of its excretory pore.…”

Section: Remarksmentioning

confidence: 99%

Spinitectus Macrospinosus N. Sp. (Nematoda: Cystidicolidae) From the Channel Catfish Ictalurus Punctatus in Southern Manitoba and Its Distribution in Other Ictalurus SPP

Choudhury¹,

Perryman²

2003

Journal of Parasitology

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Spinitectus macrospinosus n. sp., a parasite of the channel catfish Ictalurus punctatus, from the Red and Assiniboine rivers in southern Manitoba, Canada, is characterized by spines reaching a maximum length of 21.8-26.8 microm (means for males and females, respectively) in the anterior esophageal region, arranged in 4 sectors in the anterior region of the body. Spines in this region of the body increase in size and decrease in number (from a maximum of 6 to 3 per sector). The combination of spine length, number, and arrangement and the position of the excretory pore (between spine rows 6 and 7) readily distinguishes it from all its North American congeners, including the species it is most similar to, S. carolini. It is different from S. gracilis and S. acipenseri in having a posteriorly directed vagina, an excretory pore between spine rows 6 and 7, a longer stoma, a right spicule with a terminal ventral barb, and a heart-shaped caudal mucron. Spinitectus macrospinosus is similar to other North American species of Spinitectus, e.g., S. carolini, S. micracanthus, S. mexicanus, S. osorioi, and S. humbertoi, in having the anterior rows of spines arranged in 4 sectors. It is also similar to S. micracanthus and S. carolini in possessing a relatively long stoma, a posteriorly directed vagina, a right spicule with a terminal ventral barb, and a heart-shaped caudal mucron. Furthermore, it is similar to S. carolini in possessing an "area rugosa" with 2 rows of precloacal cuticular cleats. In southern Manitoba, S. macrospinosus appears to mature only in the channel catfish. Reexamination of museum specimens revealed that the nematode also is found in I. furcatus in Kentucky Lake (Kentucky-Tennessee) and in I. lacustris in Lake Texoma (Oklahoma-Texas).

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Comparative Morphology of the North American Species of Spinitectus (Nematoda: Spirurida) Analyzed by Scanning Electron Microscopy

Cited by 16 publications

References 0 publications

Two cystidicolids (Nematoda, Cystidicolidae) from marine fishes off New Caledonia

Two cystidicolids (Nematoda, Cystidicolidae) from marine fishes off New Caledonia

Guide to the Parasites of Fishes of Canada Part V: Nematoda

Spinitectus Macrospinosus N. Sp. (Nematoda: Cystidicolidae) From the Channel Catfish Ictalurus Punctatus in Southern Manitoba and Its Distribution in Other Ictalurus SPP

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