Abstract
Free-living microturbellarians are a part of lentic and lotic aquatic assemblages and play an important but underestimated role in aquatic ecosystems. Consequently, they are not included in studies on the dynamics of freshwater aquatic invertebrate communities. We report eight new records of microturbellarians from the Suquía River (Córdoba, Argentina): Catenula lemnae Dugès, 1832, Stenostomum arevaloi Gieysztor, 1931, Stenostomum aff. amphotum Marcus, 1945, Macrostomum aff. quiritium Beklemischev, 1951, Macrostomum platensis Adami, Damborenea & Ronderos, 2012, Microstomum sp., and Mesostoma erhenbergii (Focke, 1836). We discuss these results within the geomorphological history of the river basin
Highlights
The Suquía River is a closed basin and one of the five main rivers in Córdoba Province, Argentina (Díaz et al 2018)
We report eight new records of microturbellarians from the Suquía River (Córdoba, Argentina): Catenula lemnae Dugès, 1832, Stenostomum arevaloi Gieysztor, 1931, Stenostomum aff. amphotum Marcus, 1945, Macrostomum aff. quiritium Beklemischev, 1951, Macrostomum platensis Adami, Damborenea & Ronderos, 2012, Microstomum sp., and Mesostoma erhenbergii (Focke, 1836)
Córdoba Province is in the Neotropical region, where many studies have reported on the high species diversity of turbellarians in a variety of aquatic environments (e.g., Marcus 1945a, 1945b, 1946, 1948, 1950, 1952; Noreña et al 2005; Martínez-Aquino et al 2014; Braccini et al 2016; Reyes and Brusa 2017)
Summary
The Suquía River is a closed basin and one of the five main rivers in Córdoba Province, Argentina (Díaz et al 2018). The Suquía River belongs to an endorheic system, and evidence suggests that its course was diverted to drain into the Mar Chiquita Lake after geomorphological and tectonic events during the Middle Pleistocene Prior to these events, these waters flowed northeast to Salado River, a tributary of the Plata Basin (Castellanos 1958; Mon and Gutiérrez 2009). In Argentina, exhaustive studies have been conducted on the ecological and taxonomic traits of “Turbellaria” (Noreña-Janssen 1995a, 1995b, Brusa et al 2003, 2008; Noreña et al 2004; Brusa 2006; Damborenea et al 2007, 2011; Adami et al 2012; Lachowich et al 2016; Adami and Damborenea 2020) Most of these studies were undertaken in the Paraná and Río de la Plata Basin, Check List 17 (6)
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