Glaser is offering one of the Dwarf Rasboras, Boraras micros, and writes this in the description. It sounds so much like the current situation in Nannostomus especially with some of the new super-red forms that have come in, right down to the mistaken identity of females.
"Dwarf raboras (Boraras) are very popular among hobbyists. Scientifically, there are six recognized species (B. urophthalmoides, B. brigittae, B. merah, B. maculata, B. #micros, and B. naevus), and distinguishing between them can sometimes be tricky. For example, the validity of B. merah is a subject of controversy in the hobby because very careful breeding experiments have shown that these are actually females of B. brigittae. The two smallest species, B. micros and B. naevus, are found far apart from each other—B. micros in northern #Thailand and B. naevus in the south. Unfortunately, the color differences mentioned in scientific papers on these species are often of little practical help, as intermediate forms exist."
"Dwarf raboras (Boraras) are very popular among hobbyists. Scientifically, there are six recognized species (B. urophthalmoides, B. brigittae, B. merah, B. maculata, B. #micros, and B. naevus), and distinguishing between them can sometimes be tricky. For example, the validity of B. merah is a subject of controversy in the hobby because very careful breeding experiments have shown that these are actually females of B. brigittae. The two smallest species, B. micros and B. naevus, are found far apart from each other—B. micros in northern #Thailand and B. naevus in the south. Unfortunately, the color differences mentioned in scientific papers on these species are often of little practical help, as intermediate forms exist."
