Sanguinicola platyrhynchi n. sp. (Digenea: Sanguinicolidae) parasite of visceral cavity of Hemisorubim platyrhynchos (Valenciennes, 1840) (Pisces: Pimelodidae) from the floodplain of the upper Paraná River, Brazil

Abstract

A new species is of the genus Sanguinicola Plehn, 1905 described, Sanguinicola platyrhynchi n. sp., digenetic parasite of visceral cavity of Hemisorubim platyrhynchos (Valenciennes, 1840) from the floodplain of the upper Paraná River, Brazil. The species has been thus included because of the presence of separate dorsal genital pores, while differing from other species of the same genus mainly in digestive apparatus features, genital pore position, and infection site. Emendation of generic diagnosis is included.

Blood flukes (Digenea: Aporocotylidae) of walking catfishes (Siluriformes: Clariidae): new genus and species from the Mekong River (Vietnam) with comments on related catfish aporocotylids

“…We regard the presence of two columns of denticles and flanking the mouth as the marquee feature that differentiates Nomasanguinicola from all other blood fluke genera. Other aporocotylids have minute, straight spines typically arranged in concentric rows distributing anterior to the mouth (Meade and Pratt 1965, schell 1974, guidelli et al 2002, Bullard 2012; however, those spines should not be confused with the denticles described herein and diagnostic for Nomasanguinicola. Moreover, we doubt that the denticles of Nomasanguinicola and the concentric, minute spines of aporocotylids are homologous.…”

Cytochemical features of the digestive tract mucosa of Hemisorubim platyrhynchos (Siluriformes: Pimelodidae)

“…Acid glycoconjugates have been related to lubrication of the mucosa surface (Cardoso et al, 2015), increased secretory viscosity (Tibbetts, 1997;Díaz et al, 2008), protection of the intestinal epithelium against glycosidases (Rhodes et al, 1985) and protection against parasites Dezfuli et al, 2010). Although this work did not analyse parasites, several studies have described their presence in H. platyrhynchos (Pavanelli et al, 1997;Guidelli et al, 2002Guidelli et al, , 2003Pádua et al, 2013). According to Bosi et al (2005), mucus secreted onto the surface of the intestine forms a physical barrier to invading parasites so that the attachment of helminths to the surface is prevented and their expulsion by peristalsis facilitated.…”

“…Acid glycoconjugates have been related to lubrication of the mucosa surface (Cardoso et al, ), increased secretory viscosity (Tibbetts, ; Díaz et al, ), protection of the intestinal epithelium against glycosidases (Rhodes et al, ) and protection against parasites (Bosi et al, ; Dezfuli et al, ). Although this work did not analyse parasites, several studies have described their presence in H. platyrhynchos (Pavanelli et al, ; Guidelli et al, , ; Pádua et al, ). According to Bosi et al .…”

Blood flukes (Digenea: Aporocotylidae) infecting body cavity of South American catfishes (Siluriformes: Pimelodidae): two new species from rivers in Bolivia, Guyana and Peru with a re-assessment of Plehniella Szidat, 1951

“…Aporocotylidae Brasil-Sato and Pavanelli (2004) Plehniella dentata Paperna, 1964 incertae sedis Clarias gariepinus (Burchell) (Clariidae) (as C. lazera [Valenciennes]) ʻintestineʼ (probably mesenteric vessels) Lake Tiberia and Hule Nature Reserve, Israel Paperna (1964) Plehniella platyrhynchi (Guidelli, Isaac et Pavanelli, 2002) Odhner, 1924 Auchenoglanis occidentalis (Valenciennes) (Claroteidae) blood, heart Sudan, Africa Woodland (1923), Odhner (1924), Khalil (1969Khalil ( , 1971, Paperna (1996) Synodontis schall (Block and Schneider) (Mochoidae) mesenteric and branchial blood vessels Cairo and Giza fish markets, Egypt Woodland (1923), Imam et al (1984) Sanguinicola clarias Imam, Marzouk, Hassan et Itman, 1984 incertae sedis Clarias gariepinus (Burchell) (Clariidae) (as C. lazera) ʻmesenteric and other blood vesselsʼ Cairo and Giza fish markets, Egypt Imam et al (1984) not specified Beni-Suef fish market, Egypt Imam and El-Askalany (1990) Canal del Dique (10°20'59''N; 74°58'00''W), Magdalena River Basin, Colombia, AUM 35398. These fish were formalin-fixed in the field (immersed and abdominally injected) and subsequently transferred to, and held in, 70% EtOH.…”

“…This significant portion of the Neotropical region arguably harbours the most diverse freshwater ichthyofauna on the Earth, estimated to exceed 4 000 species (Reis 2013). However, only three of 136 (2%) aporocotylid species assigned to two genera reportedly infect five South American freshwater fishes from four genera: Sanguinicola argentinensis Szidat, 1951 infects heart and vessels leading to the gills of the streaked prochilodid, Prochilodus platensis (Holmberg) = Prochilodus lineatus (Valenciennes) (Characiformes: Prochilodontidae); Plehniella coelomicola Szidat, 1951 infects the body cavity of the long-whiskered catfishes (Siluriformes: Pimelodidae) Iheringichthys labrosus (Lütken), Pimelodus albicans (Valenciennes) and Pimelodus clarias maculatus (Bloch) = Pimelodus macu-latus (Lacépède); and Plehniella platyrhynchi (Guidelli, Isaac et Pavanelli, 2002) (originally as Sanguinicola platyrhynchi Guidelli, Isaac et Pavanelli, 2002) infects body cavity of porthole shovelnose catfish, Hemisorubim platyrhynchos (Valenciennes) (Pimelodidae) ( Table 1).…”