Coronatella (Coronatella) acuticostata (Sars, 1903)

21. Coronatella (Coronatella) acuticostata (Sars, 1903)

Localities and specimens found: 15 – 1♀; 16 – 1♀, 1♀ em; 32 – 1♀; 33 – 1♀, 1♀ ov; 65 – 8♀, 3♀ ov, 1♀ em, 2♂, 1j.

Distribution and ecology. Coronella acuticostata is the current name of one of the Oriental representatives of the genus (Sinev 2016, 2017). The species is rather common in most countries of Southeast Asia, India and Southern China, where it was previously recorded under a number of synonymous names: Alona monacantha (or A. cf. monacantha ) Sars, 1901, A. monacantha tridentata Stingelin, 1905 , A. acuticostata var. tridentata Stingelin, 1905 , Coronatella monacantha (or C. cf. monacantha ) ( Sars, 1901), C. monacantha tridentata (Stingelin, 1905) ( Idris & Fernando 1981; Rajapaksa & Fernando 1982a; Idris 1983; Michael & Sharma 1988; Sanoamuang 1998; Maiphae et al. 2005, 2008; Tanaka & Ohtaka 2010; Van Damme et al. 2010, 2013; Chatterjee et al. 2013; Korovchinsky 2013; Kotov et al. 2013b; Sinev et al. 2015; Sinev & Yusoff 2015; Sinev 2016; Sharma & Sharma 2017; Tiang-nga et al. 2020; Choedchim & Maiphae 2023). In Vietnam, this crustacean was earlier reported as Alona monacantha ( Shirota 1966; Duong et al. 2008; Dang & Ho 2001; Dang et al. 2002), A. cf. monacantha ( Gusakov et al. 2014) or Coronatella cf. monacantha ( Sinev & Korovchinsky 2013) .

Sinev (2016) classifies C. acuticostata as a littoral species associated with vegetation. So far, this chydorid has been detected in different water bodies, mainly permanent: lakes, reservoirs, ponds, mining pools, rice fields, marshes, rivers, streams, drains ( Idris 1983; Sanoamuang 1998; Dang & Ho 2001; Tanaka & Ohtaka 2010; Sinev & Korovchinsky 2013; Sinev & Yusoff 2015; Sinev et al. 2015; Gogoi et al. 2018; Choedchim & Maiphae 2023). We encountered several individuals of this species in overgrown and vegetation-free biotopes of natural lakes and in a temporary roadside pool (see Appendix 1).

Remarks. The distribution of the present Coronatella (former Alona ) monacantha s. str., to which C. acuticostata was previously often attributed, seems to be limited only to the Neotropical region. Asian populations of C. acuticostata still require additional, more detailed analysis ( Sinev 2004; Kotov et al. 2013b; Van Damme et al. 2010, 2013; Sinev & Yusoff 2015; Sinev et al. 2015).