The morphology of free-living stages and immature parasites of Rhabdias paraensis (Nematoda: Rhabdiasidae), a parasite of Rhinella marina (Anura: Bufonidae) in Brazil
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Francisco Tiago de Vasconcelos Melo
Abstract
Rhabdias paraensis Santos, Melo, Nascimento, Nascimento, Giese et Furtado, 2011 was described based on fully gravid worms. Further investigations on the free-living stages, immature worms and young individuals were facilitated by cultivation in the laboratory, which allowed us to add new information about the morphology and development of the species. Observations on the free-living development of R. paraensis showed that the life cycle is typical of Rhabdias, with alternation of gonochoristic and hermaphroditic generations and without homogony. Males of the free-living generation were different from those in several species of the genus studied previously. In the original description, the excretory glands and duct were absent in gravid specimens of R. paraensis, while in this study, distinct excretory glands and a duct were observed in immature and young individuals. Additionally, we recognised the separation of the buccal capsule walls into anterior and posterior portions and described the specific shapes of these portions in lateral and apical view. Studies on the morphology and development of free-living stages of Rhabdias spp. from Neotropical regions may provide additional information for species determination.
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© 2016
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Articles in the same Issue
- Toxocarosis of the organ of sight – the complex pathological and diagnostic problem
- Trichomonas vaginalis: An Updated Overview Towards Diagnostic Improvement
- New species and records of mites of the superfamily Sarcoptoidea (Acariformes: Psoroptidia) from mammals in Brazil
- The morphology of free-living stages and immature parasites of Rhabdias paraensis (Nematoda: Rhabdiasidae), a parasite of Rhinella marina (Anura: Bufonidae) in Brazil
- Effects of altered water quality and trace elements on the infection variables of Paradiplozoon ichthyoxanthon (Monogenea: Diplozoidae) from two sites in the Vaal River system, South Africa
- Herd-level seroprevalence of Neospora caninum infection in dairy cattle in central and northeastern Poland
- Ultrastructure of Ascaridia galli (Schrank, 1788) (Nematoda: Ascaridida) from the endangered green peafowl Pavo muticus Linnaeus (Galliformes: Phasianidae)
- Prevalence and risk factors associated to Eimeria spp. infection in unweaned alpacas (Vicugna pacos) from Southern Peru
- Description of a new species of Chabaudus Inglis and Ogden, 1965 (Nematoda: Seuratoidea) from the frog Euphlyctis cyanophlyctis from Dehrandun, Uttarakhand, India
- Fertilization in the cestode Echinococcus multilocularis (Cyclophyllidea, Taeniidae)
- Expression analysis of viscerotropic leishmaniasis gene in Leishmania species by real-time RT-PCR
- Fourier transform infrared spectroscopy as a tool for identification of crude microbial extracts with anti-malarial potential
- A 43 kDa recombinant plasmepsin elicits immune response in mice against Plasmodium berghei malaria
- Effects of Echinostoma caproni miracidia dose on the amino acid contents of Biomphalaria glabrata as determined by high-performance thin-layer chromatography
- In search of a potential diagnostic tool for molecular characterization of lymphatic filariasis
- Seasonal pattern in parasite infracommunities of Hoplerythrinus unitaeniatus and Hoplias malabaricus (Actinopterygii: Erythrinidae) from the Brazilian Amazon
- The first detection of the tick-borne encephalitis virus (TBEV) RNA in Dermacentor reticulatus ticks collected from the lowland European bison (Bison bonasus bonasus L.)
- Assessing the influence of geographic distance in parasite communities of an exotic lizard
- Diagnostic value of semi-purified antigens of hydatid cyst fluid in human cystic echinococcosis
- Occurrence and morphogenetic characteristics of Gyrodactylus (Monogenea: Gyrodactylidae) from a rainbow trout farm (Lake Ladoga, Russia)
- Dactylogyrids (Monogenea) parasitic on cichlids from northern Brazil, with description of two new species of Sciadicleithrum and new host and geographical records
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