Hydramara Knisch, 1925

FIKÁýEK, Martin & VONDRÁýEK, Dominik, 2014, A review of Pseudorygmodus (Coleoptera: Hydrophilidae), with notes on the classification of the Anacaenini and on distribution of genera endemic to southern South America, Acta Entomologica Musei Nationalis Pragae 54 (2), pp. 479-514 : 504

Hydramara Knisch, 1925

Known distribution. The genus contains a single species, H. argentina ( Knisch, 1925) . It is known from the following localities: ARGENTINA: CATAMARCA: El Rodeo [28°12ƍ25ƎS 65°52ƍ42ƎW] ( SPANGLER 1979b). COR- DOBA: without precise locality ( SPANGLER 1979b; not included into the dataset). LA RIOJA: Departamento General Lamadrid, Río del Peñon [28°52ƍ43.3ƎS 68°34ƍ24.3ƎW] ( ARCHANGELSKY 2000); Departamento Sanagasta, Arroyo Tambito, 29°09ƍ47ƎS 67°4ƍ47ƎW ( ARCHANGELSKY 2000); Departamento Chilecito, road to Mina de Oro [29°6ƍ25ƎS 67°36ƍ17.4ƎW] ( ARCHANGELSKY 2000). MENDOZA: Punta del Agua [35°31ƍ7.4ƎS 68°5ƍ0.3ƎW] ( KNISCH 1925); Tala ( KNISCH 1925, not localized and not included into the dataset). SALTA: Angastaco [25°37ƍ49ƎS 66°9ƍ39.3ƎW] (SPANGLER 1979); Cafayate [26°4ƍ49ƎS 65°58ƍ58.3ƎW] ( SPANGLER 1979b); Cañada la Gotera, Rt. 59, km 23.5 [24°56ƍ33.8ƎS 68° 6ƍ37.4ƎW] ( SPANGLER 1979b); Depto. Rosario de la Frontera, El Morenillo [26°12ƍ1.5ƎS 64°50ƍ6ƎW] ( SPANGLER 1979b); La Zanja, west of Chicoana [= Las Zanjas, 25°8ƍ20ƎS 65°44ƍ29ƎW] ( SPANGLER 1979b). SAN LUIS: Merlo [32°20ƍ17.8ƎS 64°59ƍ54.4ƎW] (SPANGLER 1979). TUCUMAN: Horco Molle [26°47ƍ28.6ƎS 65°19ƍ49.1ƎW] ( SPANGLER 1979b); Tipas [= Las Tipas, 26°40ƍ0.7ƎS 65°24ƍ3.7ƎW] ( SPANGLER 1979b).

Results of the model of the potential distribution. Number of occurrence points analyzed:14.Training AUC:0.979. Treshhold for equal training sensitivity and speci¿city: 0.248. Most contributing climatic layers: bio6 – minimum temperature of the coldest month (50.2 %), bio19 – precipitation of the coldest quarter of the year (27.1 %).

Potential distribution. The potential distribution covers a large area of mostly semiarid to arid montane and sub-montane regions in central and northwest Argentina (where actual records are known), but also includes dry parts of the Andean altiplano in Chilean regions Atacama, Antofagasta, Tarapaca and Arica y Parinacota, the dry high-altitude areas in southwestern and western Bolivia, and a narrow isolated belt of dry Andean foothills in southern Peru between the provinces of Lima and Arequipa. A very isolated area of suitable climatic conditions is also present in the southern part of the Argentinian province of Santa Cruz.

Biology. Based on the published records, Hydramara argentina inhabits the montane or submontane rivers and streams, often those which are highly seasonal, and dry up for the larger part of the year ( SPANGLER 1979b, ARCHANGELSKY 2000).