Dero (Allodero) lutzi Michaelsen, 1926 (Oligochaeta: Naididae) associated with Scinax fuscovarius (Lutz, 1925) (Anura: Hylidae) from Semi-deciduous Atlantic Rain Forest, southern Brazil

Abstract

Amphibians are hosts for a wide variety of ecto-and endoparasites, such as protozoans and parasitic worms. Naididae is a family of Oligochaeta whose species live on a wide range of substrates, including mollusks, aquatic macrophytes, sponges, mosses, liverworts, and filamentous algae. However, some species are known as endoparasitic from vertebrates, such as Dero (Allodero) lutzi, which is parasitic of the urinary tracts of frogs, but also have a free-living stage. Specimens in the parasitic stage lack dorsal setae, branchial fossa, and gills. Here we report the occurrence of D. (A.) lutzi associated with anuran Scinax fuscovarius from Semi-deciduous Atlantic Rain Forest in southern Brazil. The study took place at the Caiuá Ecological Station, Diamante do Norte, Paraná, southern Brazil. Seven specimens of S. fuscovarius were examined for parasites but only one was infected. Parasites occurred in ureters and urinary bladder. Previous records of this D. (A.) lutzi include the Brazilian States of Santa Catarina, São Paulo, Rio de Janeiro, and Minas Gerais, as well as Cuba and North America. This is a new locality record for this species in Brazil. Reports of Dero (Allodero) lutzi are rare, due to difficulty of observation, and such events are restricted only the fortuitous cases. It is important to emphasize the necessity of future studies, which are fundamental to the understanding of biological and ecological aspects of this species.Keywords: anuran, Hylidae, endoparasite, urinary tract, Annelida. Dero

Oligochaeta (Annelida: Clitellata) in the Juruena River, MT, Brazil: species indicators of substrate types

“…Oligochaeta are some of the most abundant groups in continental aquatic macrofauna and play an important role in the process of decomposition and cycling of organic matter in freshwater ecosystems , Cesar & Henry 2017. These organisms are found in almost all fresh aquatic environments (Cesar & Henry 2017), living in sediment and water columns (Rodriguez & Reynoldson 2011), and in association with other organisms (Corbi et al 2004, Gorni & Alves 2008, Oda 2015.…”

Aquatic oligochaeta (Annelida: Clitellata) in extractive reserve Lake Cuniã, Western Brazilian Amazon

“…This results in fragmented and scarce information on the invertebrate fauna (Magurran, 2011), especially in continental aquatic ecosystems, where the information about this group is even more incomplete (Agostinho et al 2005). Biota Neotrop., 17(1): e20160232, 2017 http://www.scielo.br/bn http://dx.doi.org/10.1590/1676-0611- BN-2016-0232 Aquatic Oligochaeta worms are one of the most abundant organisms in continental aquatic fauna and can be found in sediments, in water columns or associated to other organisms such as molluscs (Gorni & Alves, 2006), aquatic macrophytes (Alves & Gorni, 2007), insect larvae (Corbi et al 2004), bryophytes (Gorni & Alves, 2007), sponges (Gorni & Alves, 2008a) and amphibians (Oda et al, 2015). It is important to highlight that these organisms are important for organic matter cycling of freshwater ecosystems, bioturbation processes, biomonitoring research, aquatic ecotoxicology and test organisms (Chapman, 2001, Corbi et al 2015.…”

First record of Nais schubarti Marcus, 1944 (Oligochaeta: Naididae) in the State of São Paulo

“…According to Alves et al (2008), Petsch et al (2015), Maroneze et al (2011) and Ragonha et al (2014), these organisms can be found living on sandy substrates or in organic matter enriched environments (Behrend et al, 2012). In addition, these organisms are also recorded associated with aquatic macrophytes and leaf litter (Trivinho-Strixino et al, 2000;Alves and Gorni, 2007;Gorni and Alves, 2007;Oliveira et al, 2014) with sponges (Gorni and Alves, 2008) gastropods (Gorni and Alves, 2006), insect larvae (Corbi et al, 2004) and amphibians (Oda et al, 2015). Recent studies (Gorni et al, 2015) recorded 75 species of aquatic oligochaetes in the State of São Paulo, in which 64 species (85%) belong to the Naididae family.…”