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1

A new host record for Vasorhabdochona cablei [Nematoda, Rhabdochonidae] in the Pacific coast of Mexico

100%
Gonzalez-Solis D.
Acta Parasitologica
|
2004
|
tom 49
|
nr 1
This study reports the presence of the nematode Vasorhabdochona cablei in the digestive tract of the white grunt, Haemulopsis leuciscus (syn. Pomadasys leuciscus) collected in the Chamela Lagoon, State of Jalisco, Mexico. This rhabdochonid species is characterized by the absence of longitudinal thickenings or teeth in the anterior end of vestibule, vulva in the anterior part of body and eggs without polar plugs or filaments. Its occurrence in this fish represents a new host record, since V. cablei has only been reported from an estuarine (Gobiomorus maculatus) and marine fish (Gillichthys mirabilis) from neighboring localities in the Pacific coast of Mexico.
2

Pancreatonema americanum sp.nov. [Nematoda, Rhabdochonidae] from the pancreatic duct of the dogfish shark, Squalus acanthias, from the coast of Massachusetts, USA

84%
Moravec F., Borucinska J. D., Frasca S.
Acta Parasitologica
|
2001
|
tom 46
|
nr 4
3

Some aspects of the taxonomy, biology, possible evolution and biogeography of nematodes of the spirurine genus Rhabdochona Railliet, 1916 [Rhabdochonidae, Thelazioidea]

67%
Moravec F.
Acta Parasitologica
|
2010
|
tom 55
|
nr 2
144-160
At present the nematode genus Rhabdochona Railliet, 1916 (Rhabdochonidae) comprises 92 possibly valid species, mostly intestinal parasites of freshwater fishes in all zoogeographical regions. Because of the absence of any phylogenetic studies using molecular methods in this nematode group, an attempt to evaluate affinities among these parasites and their zoogeography on the basis of morphological features and host-parasite relationships has been carried out. Only true definitive hosts should be considered for such evaluation. It appears that, during the evolution of Rhabdochona spp., there occur an increase in the number of anterior prostomal teeth, loss of lateral alae, the right spicule attains a boat-like shape and a dorsal barb develops on its distal tip, and the distal tip of the left spicule attains gradually a more complex structure; the eggs with a smooth surface are considered to be more primitive. Nematodes of this genus most probably originated in the region of present southern Asia at the beginning of Tertiary. Closest to the initial type appear to be members of the subgenus Globochona Moravec, 1972, from which lineages leading to the subgenera Globochonoides Moravec, 1975, Rhabdochona Railliet, 1916 and Sinonema Moravec, 1975 can be derived. The morphology of Rhabdochona spp. indicate a close relationship between the Palaearctic fauna of these nematodes with the Nearctic species, and the Oriental fauna with the Ethiopian fauna. The Neotropical species can be derived from Nearctic members of the subgenus Rhabdochona; the latter probably penetrated, along with leuciscine hosts into North America from Palaearctic Eurasia at the end of Tertiary. The distribution of Palaearctic species of Rhabdochona corresponds to faunistical complexes in the conception of ichthyologists.
4

Rhabdochona ictaluri sp. nov. [Nematoda, Rhabdochonidae] from ictalurid catfishes in Mexico

67%
Aguilar-Aguilar R., Rosas-Valdez R., Leon G. P.-P.
Acta Parasitologica
|
2010
|
tom 55
|
nr 3
276-280
A new species of Rhabdochona is described as a parasite of two endemic species of catfishes (Ictalurus dugesii and Ictalurus pricei) from two river basins in central and northern Mexico (Río Ameca and Río Tunal). Rhabdochona ictaluri sp. nov. is characterized by a combination of morphological traits that include the presence of basal teeth, bifurcated deirids, absence of a dorsal barb in left spicule and length ratio between spicules. The combination of these traits readily distinguishes the new species from all its congeners, including those species possessing 14 teeth in the prostom. The new species appears to be specific to freshwater ictalurids.
5

Rhabdochona (Rhabdochona) keralaensis sp. nov. (Rhabdochonidae) and some other nematodes in the Indian mottled eel Anguilla bengalensis bengalensis from India

67%
Moravec F., Sheeba S., Kumar A. B.
Acta Parasitologica
|
2012
|
tom 57
|
nr 1
A new species of parasitic nematode, Rhabdochona (Rhabdochona) keralaensis sp. nov., is described based on specimens recovered from the intestine of Anguilla bengalensis bengalensis (Gray) collected from the freshwater bodies of Kerala State, southern India. It is characterized mainly by the presence of ten anterior prostomal teeth, absence of basal teeth, simple deirids, length of spicules, number and arrangement of preanal papillae and non-filamented eggs. Two species of camallanid nematodes, adults of Camallanus cotti Fujita, 1927 and a single Procamallanus (Spirocamallanus) sp. fourth-stage larva, were also recorded from A. bengalensis. Camallanus cotti, a pathogenic parasite of many species of wild and aquarium-reared fishes in many countries of South and East Asia, Europe, South and North America, West Indies and Australia, is reported for the first time from a representative of the fish family Anguillidae. Descriptions of R. (R.) keralaensis and Indian specimens of C. cotti, based on light and scanning electron microscopical examinations, are provided. Camallanus oxygasterae Gupta et Bakshi, 1983 is considered a junior synonym of C. cotti.
6

Redescription of Rhabdochona cotti [Nematoda, Rhabdochonidae] from Cottus caeruleomentum [Teleostei, Cottidae] in Maryland, USA, with remarks on the taxonomy of North American Rhabdochona spp.

67%
Moravec F., Muzzall P.
Acta Parasitologica
|
2007
|
tom 52
|
nr 1
The nematode Rhabdochona cotti Gustafson, 1949 is redescribed from specimens collected from the intestine of the blue ridge sculpin Cottus caeruleomentum (a new host record), a recently described fish species, from Little Fishing Creek in Maryland, USA. The measurements of these specimens, collected in November 2005, are generally smaller than those reported in the original description of R. cotti, this being probably associated with the nematode’s seasonal maturation cycle or the different host species. As revealed by SEM, the deirids of R. cotti are simple (not bifurcate), in which this species differs from almost all North American congeners. Of these, simple deirids, filamented eggs and a rounded tail tip in females occur only in Rhabdochona longleyi, but it distinctly differs from R. cotti in the smaller number of anterior prostomal teeth (6 vs. 14). Rhabdochona rotundicaudatum is considered a junior synonym of Rhabdochona cascadilla; numerous specimens of the latter were collected from Semotilus atromaculatus, Luxilus cornutus and Notropis rubellus from the type locality (Eramosa River, Ontario, Canada) (unpublished). Rhabdochona paxmani and Rhabdochona salmonis are synonymized with Rhabdochona kisutchi, whereas Rhabdochona californiensis is considered a junior synonym of R. cascadilla. The need of a taxonomic revision of North American species of Rhabdochona is stressed.
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