标题：Pisces, Cyprinodontiformes, Rivulidae, Austrolebias minuano (Costa and Cheffe, 2001): new species record at Lagoa do Peixe National Park, state of Rio Grande do Sul, Brazil.
期刊名称：Check List - Journal of Species Lists and Distribution
印刷版ISSN：1809-127X
出版年度：2009
卷号：5
期号：04
页码：763-766
出版社：Luís Felipe Toledo
摘要：Austrolebias minuano (Costa and Cheffe 2001)
(Figure 1) is a annual fish belonging to the
Rivulidae family that is comprised of
approximately 235 species, from which 16 are
endemic to Patos Lagoon drainage basin (Costa
2003). They inhabit temporary pools or swamps
formed at the rainy season usually during winter
months in southern Brazil (Costa 2006,
Porciuncula et al. 2006). Adults die when ponds
dry out during warmer months, but they leave
their eggs buried into the sediment, where they
remain in diapause until a new rainy season
restores water levels in their habitats (Costa
2006). Austrolebias minuano is one of the species
of the A. adloffi species group, which is
characterized by a pair of black spots arranged
vertically in close proximity, which can coalesce
to form an 8-shaped blotch, on posterior portion
of caudal peduncle in juveniles and adult females,
and sometimes in adult males (Costa 2006). It can
be distinguished by a combination of several
characters, being among them, a black bar on
parietal series of neuromasts, dorsal and anal-fin
bases with elongated white spots, anterior flank
bars about as wide as interspace and posterior bars
wider (Costa op cit.). This species is considered
endangered, especially due to expansion of
increasingly urbanization and agriculture
activities, which drastically alters and/or
permanently disrupt their habitats (Fontana et al.
2003; Rosa and Lima 2008).
