. Bonner zoologische Monographien. Zoology. 56. Fig. 1: Map of the ancient water body and ist recent remnant in the Altiplano (draft by Sienknecht, PC-drawing by Stiewe) water bodies (see Moon 1939, Newell 1949, Ahlfeld & Branisa 1960, Zeil 1979, 1984, Wörner et al. 1988, Kött et al. 1995) (fig. 1). Whichever is true, the orestiine cyprinodontids are as a whole one of the "isolated vertebrate communities in the tropics" (see ). We will concentrate on some aspects resulting from own investigations on a geographically restricted group of Orestias in the Chilean part of the Al
. Bonner zoologische Monographien. Zoology. 56. Fig. 1: Map of the ancient water body and ist recent remnant in the Altiplano (draft by Sienknecht, PC-drawing by Stiewe) water bodies (see Moon 1939, Newell 1949, Ahlfeld & Branisa 1960, Zeil 1979, 1984, Wörner et al. 1988, Kött et al. 1995) (fig. 1). Whichever is true, the orestiine cyprinodontids are as a whole one of the "isolated vertebrate communities in the tropics" (see ). We will concentrate on some aspects resulting from own investigations on a geographically restricted group of Orestias in the Chilean part of the Altiplano which has been said to belong to four different species: O. parinacotensis, O. laucaensis (Arratia 1982), O. ascotanensis (Parenti 1984) and O. chungarensis (Vila & Pinto 1986) (; fig. 4: points 1, 2, 3 and 7). In 1991, Villwock and Sienknecht collected fishes of three additional populations: from the rivers Isluga (: 4) and Collacagua (: 5) and from springs at the eastern border of the Salar de Huasco (: 6). These new points are located between - but not actually connected with - the three northern "species" and "O. ascotanensis" in the south of the Chilean Altiplano. These populations (and probably more may exist) were only named according to their locations, and not described as new species, because of reasonable suspicion that they might be the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonn, Zoologisches Forschungsinstitut und Museum Alexander Koenig
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