Topic
Cetopsidae
About: Cetopsidae is a research topic. Over the lifetime, 6 publications have been published within this topic receiving 85 citations.
Papers
TL;DR: The stomach contents of several Trichomycteridae and Cetopsidae species were examined from wet-season collections in the Portuguesa River basin, Venezuela, and based on these and other published and unpublished observations the species were classified according to feeding habits.
Abstract: The stomach contents of several Trichomycteridae and Cetopsidae were examined from wet-season collections in the Portuguesa River basin, Venezuela. Collections were from piedmont, high llanos, and low llanos habitats. Based on these and other published and unpublished observations the species were classified according to feeding habits. Among the trichomycterids, Trichomycterus kneri and T. meridae feed only on benthic insects, Vandellia feeds only on blood of fishes and other vertebrates, and Stegophilinae (Stegophilus, Homod'iaetus, and Ochmacanthus) are tentatively classified as scale eaters. The only cetopsid species taken contained terrestrial-winged insects. Cetopsids are also schooling piscivores, but none are confirmed to be parasites. Both cetopsids and trichomycterids bear the common name candiru or carnero, but their feeding habits do not indicate close phylogenetic relationship. Three parasitic species were found in the piedmont and four in the high Ilanos, but in the low llanos. where the greatest variety of fishes was found, only Ochmacanthus occurred. OF THE 13 FAMILIES AND ESTIMATED OVER 2500 SPECIES of South American freshwater catfishes, only Trichomycteridae and Cetopsidae are reported to include parasitic species (Gudger 1930, Eigenmann and Allen 1942, Kelley and Atz 1964, Roberts 1972), knowni collectively as candiru, or carnero. The two families were once considered to be closely related primarily because of this similar reputation, but recent taxonomic work has shown that the Trichomycteridae are more closely related to the Loricariidae and Callichthyidae (the armored catfishes) rather than to the Cetopsidae (Baskin 1972, Chardon 1968). The older literature contains many references to the habits of the candiru, but the actual species in question is often obscure, and the exact feeding habits of these catfish families have not been determined by systematic stomach-content analysis. The Trichomycteridae consists of about 30 genera and 136 species, divided into six subfamilies (Baskin 1972). Most are small, worm-like catfishes, characterized as having teeth on the external edges of the opercular bones, and lacking the pectoral and dorsal fin spines found in more typical catfishes. The Trichomycterinae are not considered to be parasitic, and are not included among the candiru; e.g. Eigenmann and Allen (1942) report Trichomycterus dispar feeding on molluscs, crustaceans, and fishes. The Vandelliinae and Stegophilinae contain the reported
37 citations
Journal Article•
TL;DR: A collection of naked catfishes from French Guiana, which he had brought together in the course of an ichthyological survey of that country, carried out between September 1978 and March 1980, and a discussion of this material is reserved for inclusion in a paper on the fishes of this group.
Abstract: In April 1980, Mr. P. Planquette of the Laboratoire d'Hydrobiologie, PetitBourg, Guadeloupe, presented me with a collection of naked catfishes from French Guiana, which he had brought together in the course of an ichthyological survey of that country, carried out between September 1978 and March 1980.
The survey continues and in September 1981 a few additional specimens were received from Mr. R. Rojas-Beltran, who is collaborating with Mr. Planquette in the project. The material consists of 19 species belonging to six families: Auchenipteridae (six species), Aspredinidae (one species), Pimelodidae (nine species), Helogeneidae (one species), Trichomycteridae (one species) and Cetopsidae (one species).
The Aspredinidae are represented by a single specimen belonging to the genus Bunocephalichthys (RMNH no. 28577). As, in spite of useful short reviews by Myers (1942, 1960) and Fernandez-Yepez (1953), the systematics and nomenclature of the Bunocephaline catfishes are greatly confused, a discussion of this specimen is reserved for inclusion in a paper on the fishes of this group, on which I have been working for some time. The one specimen of Trichomycterus (RMNH no. 28605) and the two specimens of Cetopsidae (RMNH nos. 28606, 28607) have not yet been identified and will not be further dealt with here, except to say that the former belongs to a species that is common and widely distributed in Suriname. Of the other species, several are new to French Guiana, but their occurrence is not unexpected as they were already known from adjacent Suriname, apart from one which appears to be undescribed.
All the collecting-localities are shown on the accompanying map (fig. 1). To facilitate comparison with my publication on certain Nematognathi from Suriname (Mees, 1974), it should to be pointed out that the Dutch name for the
10 citations
TL;DR: An examination of other samples of Cetopsidium from the rio Branco system extends the range of C. pemon into the Ireng River system of Guyana, and DNA barcodes were generated for the holotype and paratype.
Abstract: Cetopsidium soniae, new species, is described from the Takutu River basin of southwestern Guyana, within the upper portions of the rio Branco of the Amazon basin. The new species differs from its congeners in details of pigmentation, the length of the pelvic fin, the form of the first rays of the dorsal and pectoral fins in mature males, the relative alignment of the dorsal and ventral profiles of the postdorsal portion of the body, the position of the anus, and the depth of the body. DNA barcodes were generated for the holotype and paratype. An examination of other samples of Cetopsidium from the rio Branco system extends the range of C. pemon into the Ireng River system of Guyana.
7 citations
TL;DR: Data indicate a relevant participation of catfishes in the diets of potamotrygonid rays in the Amazon, and may reflect the regional diversity and abundance of Siluriformes in the region.
Abstract: In spite of the fact that catfish have rarely been reported as food items in the diets of freshwater stingrays, they are commonly observed in the stomach contents of species inhabiting the Solimoes and Negro rivers in the Brazilian Amazon. The stomach contents of six rays from the Solimoes River and 64 from the Negro River were analyzed, and catfishes (distributed among the families Callichthyidae, Cetopsidae, Doradidae and Loricariidae) were found in the stomach contents of four and 10 of these rays, respectively, comprising a frequency of occurrence of 20%. These data indicate a relevant participation of catfishes in the diets of potamotrygonid rays in the Amazon, and may reflect the regional diversity and abundance of Siluriformes in the region.
5 citations
TL;DR: A new species, Goezeella mariae sp.
Abstract: The cestode genus GoezeellaFuhrmann, 1916 is reviewed on the basis of taxonomic evaluation of type and newly collected material from pimelodid and heptapterid catfishes (Siluriformes) in the Amazon River basin, South America, and its generic diagnosis is amended. The genus is typified by the exclusively ventral position of the cortical vitelline follicles, the inner longitudinal musculature formed by dense individual muscle fibres, rather than forming bundles as in other proteocephalids, a well-developed metascolex and biloculate suckers. The type species, G. siluriFuhrmann, 1916, is redescribed based on its syntype from Cetopsis coecutiens (type-host) (Cetopsidae) and specimens from Pinirampus pirinampu (Pimelodidae). The validity of G. danbrooksi de Chambrier, Rego & Mariaux, 2004 from Ageneiosus pardalis (Auchenipteridae) is confirmed and some erroneous morphological traits are corrected based on examination of its holotype. A new species, Goezeella mariae sp. nov., is described from the heptapterid catfish Pimelodella cristata (Heptapteridae). The new species differs from congeners by its overall size (much smaller compared to G. siluri), morphology of the scolex (strongly wrinkled metascolex and weakly developed interlocular septum of suckers) and number of the testes. This is the third proteocephalid cestode described from a heptapterid catfish in South America and the first helminth parasite reported from P. cristata. Goezeella is unusual among other Neotropical proteocephalids by its occurrence in catfishes of as many as four families; all species of the genus are known only from the Amazon and Orinoco River basins. Molecular data on two of the three valid species and a key to their identification are provided.
2 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2017 | 1 |
| 2013 | 1 |
| 2009 | 1 |
| 2005 | 1 |
| 1983 | 1 |
| 1980 | 1 |