Pomphorhynchus patagonicus, Ortubay, Ubeda, Semenas and Kennedy, 1991

Hernández-Orts, Jesús S., Kuchta, Roman, Semenas, Liliana, Crespo, Enrique A., González, Raúl A. & Aznar, Francisco J., 2019, An annotated list of the Acanthocephala from Argentina, Zootaxa 4663 (1), pp. 1-64 : 19-20

Pomphorhynchus patagonicus

Actinopterygii

Aplochiton taeniatus Jenyns ( Osmeriformes , Galaxiidae ). SI: intestine. SD: adult. L: Chubut Province: Cholila Lake (42º27’S, 71º40’W). R: Ortubay et al. (1994).

Aplochiton zebra Jenyns ( Osmeriformes , Galaxiidae ). SI: intestine. SD: adult. L: Chubut Province: Cholila Lake (42º27’S, 71º40’W). R: Ortubay et al. (1994), Fernandez et al. (2012).

Cyprinus carpio Linnaeus ( Cypriniformes , Cyprinidae ). SI: liver, intestine. SD: juvenile, adult. L: Neuquén Province: Ingeniero Ballester Dam (38º43’32’’S, 68º10’22’’W), Neuquén River. R: Waicheim et al. (2014), Rauque et al. (2018). C: voucher (MACN-Pa 564/1).

Galaxias maculatus (Jenyns) ( Osmeriformes , Galaxiidae ). SI: intestine. SD: adult. L: Neuquén Province: Lácar Lake (40º10’S– 71º30’S), Machónico Lake (40º20’S– 71º33’S), Filo Hua Hum Lake (40º30’S– 71º17’S). R: Viozzi et al. (2009), Fernandez et al. (2015a). C: vouchers (MACN-Pa 462).

Galaxias platei Steindachner ( Osmeriformes , Galaxiidae ). SI: gastrointestinal tract, intestine. SD: adult. L: Chubut Province: Rosario Lake (43º15’S, 71º20’W). R: Ortubay et al. (1989, 1991, 1994), Semenas et al. (1992), Ubeda et al. (1994) (see note below).

Odontesthes hatcheri (Eigenmann) ( Atheriniformes , Atherinopsidae ) (type host). SI: gastrointestinal tract, intestine. SD: adult. L: Río Negro Province: Alicurá Reservoir (40º40’S, 71º00’W); Chubut Province: de los Cisnes Lagoon (42º25’S, 71º19’W), Lezama Lake (42º27’S, 71º29’W), Rosario Lake (43º15’S, 71º20’W), Musters Lake (45º275’S, 69º11’W). R: Ortubay et al. (1989, 1991, 1994), Semenas et al. (1992), Trejo (1992, 1994), Ubeda et al. (1994), Flores et al. (2016). C: holotype (MACN-Pa 358), allotype (MACN-Pa 358) and paratypes (MACN-Pa 358; UNCo-Pa accession numbers not provided by Ortubay et al. (1991).

Olivaichthys viedmensis (MacDonagh) ( Siluriformes , Diplomystidae ). SI: intestine. SD: adult. L: Río Negro Province: Alicurá Reservoir (40º40’S, 71º00’W). R: Ortubay et al. (1994).

Oncorhynchus mykiss (Walbaum) ( Salmoniformes , Salmonidae ). SI: intestine, oesophagus, stomach. SD: juvenile, adult. L: Neuquén Province: Aluminé Lake (38º55’S, 71º10’W), Filo Hua Hum Lake (40º28’S, 71º15’W); Río Negro Province: Ruca Choroi Lake (39º12’S, 71º17’W), Ezquerra Lagoon (41º03’S, 71º33’W), Gutiérrez Lake (41º05’S, 71º25’W), Alicurá Reservoir (40º40’S, 71º00’W); Chubut Province: Cholila Lake (42º27’S, 71º40’W), Esquel Lagoon (42º51’S, 71º05’W), Rosario Lake (43º15’S, 71º20’W). R: Ortubay et al. (1991, 1994), Semenas et al. (1992), Trejo (1992, 1994), Ubeda et al. (1994), Tanzola et al. (2009), Rauque et al. (2018) (see note below).

Percichthys trucha (Valenciennes) ( Perciformes , Percichthyidae ). SI: pericardium, digestive tract, intestine. SD: adult. L: Neuquén Province: Aluminé Lake (38º55’S, 71º10’W); Río Negro Province: Alicurá Reservoir (40º40’S, 71º00’W), Ezquerra Lagoon (41º03’S, 71º33’W), Escondido Lake, Limay River, Negro River; Chubut Province: Cholila Lake (42º27’S, 71º4W), Futalaufquen Lake (42º50’S, 71º40’W), Esquel Lagoon (42º51’S, 71º05’W). R: Ortubay et al. (1991, 1994), Trejo (1994), Semenas (1999). C: UNCo-Pa, accession numbers not provided by Semenas (1999) (see note below).

Salmo trutta Linnaeus ( Salmoniformes , Salmonidae ). SI: unknown. SD: juvenile, adult. L: Patagonia. R: Rauque et al. (2018).

Salvelinus fontinalis (Mitchill) ( Salmoniformes , Salmonidae ). SI: intestine. SD: juvenile, adult. L: Neuquén Province: Aluminé Lake (38º55’S, 71º10’W); Chubut Province: Cholila Lake (42º27’S, 71º40’W). R: Ortubay et al. (1991, 1994), Rauque et al. (2018).

Note. Ortubay et al. (1989) identified this species as Pomphorhynchus sp. from Galaxias platei and Oncorhynchus mykiss . Ortubay et al. (1994) reported adult worms of Pomphorhynchus patagonicus in the intestine of Percichthys colhuapiensis from Aluminé Lake and from Percichthys sp. from Limay River. Largemouth perchs Percichthys colhuapiensis and Percichthys sp. from freshwater environment in Patagonia are considered morphotypes of Percichthys trucha (see Ruzzante et al. 2011). Semenas (1999) reported adult worms in the pericardium of Percichthys trucha , which is an atypical site of infection.

Malacostraca

Hyalella patagonica (Cunningham) ( Amphipoda , Hyalellidae ). SI: hemocoel. SD: late acanthella, cystacanth. L: Chubut Province: Rosario Lake. R: Ortubay et al. (1989, 1991), Semenas et al. (1992), Ubeda et al. (1994), Rauque and de los Ríos Escalante (2013) (see note below).

Hyalella sp. ( Amphipoda , Hyalellidae ). SI: hemocoel. SD: cystacanth. L: Neuquén Province: Montecinos Lagoon (39º01’S, 70º02’W), Machónico Lake (40º20’S, 71º33’W); Río Negro Province: Los Juncos Lagoon (41º03’S, 70º00’W), Fantasma Lagoon (41º17’S, 71º34’W); Chubut Province: Rosario Lake (43º15’S, 71º17’W). R: Rauque (2013).

Note. Ortubay et al. (1989) identified the acanthella and cystacanths as Pomphorhynchus sp. from Hyalella patagonica . Semenas et al. (1992) experimentally infected Hyalella patagonica with eggs (containing fully formed acanthors) from the pseudocoel of live gravid females of Pomphorhynchus patagonicus . Gravid females of Pomphorhynchus patagonicus were collected from the intestine of Odontesthes hatcheri from Rosario Lake, Chubut Province by Semenas et al. (1992).