Macrothricidae Norman & Brady, 1867 sensu Smirnov, 1992

Escalante, Patricio De Los Rios & Kotov, Alexey A., 2015, A checklist of Branchiopoda (Anostraca and Cladocera) of Chilean continental waters, Zootaxa 4027 (3), pp. 366-388 : 374-375

Family Macrothricidae Norman & Brady, 1867 sensu Smirnov, 1992

(42) Cactus cactus ( Vávra, 1900) (described as Macrothrix cactus Vávra, 1900 ). Punta Arenas (53° 09' S; 70° 55' W) ( Vávra 1900; Ruiz & Bahamonde 1989); Lago San Ricardo, Tierra del Fuego ( Smirnov & Kotov 2009). Listed for Chile by Villalobos (2006). This taxon is an endemic of the southernmost corner of South America and Tierra del Fuego.

(43) Macrothrix atahualpa Brehm, 1936 (syn. M. palearis Harding, 1955 , syn. Echinisca palearis ). Chungará lake (18°15' S; 69°10' W) (Domínguez 1983; Ruiz & Bahamonde 1989; Berrios & Sielfeld 2000), Salar de Lagunillas (19°59' S; 68° 54' W) (Kotov et al. 2010). Listed for Chile by Villalobos (2006).

Macrothrix ciliata Vávra, 1900 . Junior synonym of M. oviformis ( Kotov 2007) .

Macrothrix chevreuxi Guerne & Richard, 1892 . Peña Blanca, Quilpué (33° 07' S; 71° 14' W), Valdivia (39° 49' S; 73° 15' W) ( Ekman 1900). It is regarded as junior synonym of M. triserialis ( Smirnov 1992) . Even if M. chevreuxi will be regarded as a valid taxon in the future, a chance to find this African taxon in South America is minimal keeping in mind already demonstrated non-cosmopolitanism of this group ( Dumont et al. 2002).

(44) Macrothrix goeldi Richard, 1897 . "près de Concepción et à Lunache” (= Limache, 32° 59' S; 71° 17' W)" ( Richard 1897; Kotov & Ferrari 2010). A preliminary name for Macrothrix cf. spinosa King, 1853 from South America. But this group needs to be accurately revised worldwide.

(45) Macrothrix hirsuticornis Norman and Brady, 1867 . Manzanillo river (33° 26' S; 70° 28' S) ( Brehm 1936); Plateado reservoir (33° 04' S; 71° 39' W), Yeso reservoir (33° 39' S; 70° 07' W) ( Domínguez & Zúñiga 1976; Ruiz & Bahamonde 1989); Santiago, Antarctic Peninsula ( Berrios & Sielfeld 2000). Listed for Chile by Villalobos (2006). In reality, this determination is problematic. No M. hirsuticornis s.st. is present in southern portion of South America, only M. oviformis ( Kotov 2007) . But more northern populations need to be revised.

Macrothrix inflata Daday, 1902 . Junior synonym of M. oviformis .

(46) Macrothrix laticornis (Jurine, 1820) s. lat. (described as Monoculus laticornis Jurine, 1820 ). El Peral (33° 30' S; 71° 35' W) ( Araya & Zúñiga 1985); Valparaiso (33° 04' S; 71° 38' W) ( Berrios & Sielfeld 2000). Listed for Chile by Villalobos (2006). A widely distributed group needs to be revised worldwide keeping in mind that even in Holarctic it is represented by several species ( Silva-Briano et al. 1999).

M. odontocephala Daday, 1902 . Junior synonym of M. oviformis .

(47) Macrothrix oviformis Ekman, 1900 (syn. M. ciliata Vávra, 1900 ; M. inflata Daday, 1902 ; M. odontocephala Daday, 1902 . Del Inca lagoon (32° 49' S; 70° 09' W), Peñuelas lagoon (33° 09' S; 71° 32' W) ( Araya & Zúñiga 1985; Ruiz & Bahamonde 1989; Berrios & Sielfeld, 2000), Laguna Melliza, Parque Nacional de las Torres del Paine (51° 03' S; 72° 57' W); grassy meadow, 8 km north of turnoff to Monte Aymond (52° 08' S; 69° 31' W) ( Kotov 2007); Salar de Lagunillas (19° 59' S; 68° 54' W) (Kotov et al. 2010). Listed for Chile by Villalobos (2006). A taxon widely distributed in southernmost portion of South America, Tierra del Fuego, Antarctic Peninsula and surrounding islands ( Kotov 2007).

Macrothrix palearis Harding, 1955 . Junior synonym of M. atahualpa .

(48) Macrothrix triserialis Brady, 1886 s.lat. Реñаblаnса close to Quilpué (33° 07' S; 71° 14' W); Valdivia (39° 49' S; 73° 15' W) ( Vávra 1900; Ruiz & Bahamonde 1989)."Valparaiso (33° 04' S; 71° 38' W) a Valdivia" ( Berrios & Sielfeld 2000). Most probably, these populations belong to M. elegans Sars, 1901 , common in South America ( Dumont et al. 2002; Kotov et al. 2004).

(49) Streblocerus serricaudatus (Fischer, 1849) . Isla Margarita ( Löffler 1961); Lago Llanquihue (41° 15' S; 73° 01' W) ( Thomasson 1963); Lago Todos los Santos ( Zúñiga & Domínguez 1977; Ruiz & Bahamonde 1989); Former Lakes district (current River and Lakes districts: 39° 48' S – 45° 48' W) ( Berrios & Sielfeld 2000). Listed for Chile by Villalobos (2006). S. cf. serricaudatus from South America is very similar to those from Eurasia ( Paggi 1976; Smirnov 1992), but this taxon must be revised according to new standards of morphological analysis.