Analysis of information sources in references of the Wikipedia article "Lacunolabial scale" in English language version.
Burger (1971) first proposed the B. neuwiedi group based on morphological traits grouping B. neuwiedi with B. itapetiningae and B. iglesiasi. Werman (1992), based on morphology and protein electrophoresis, expanded the B. neuwiedi group to include a wider assemblage composed of the species with a divided lacunolabial scale, i.e. B. alternatus, B. erythromelas, B. itapetiningae and B. neuwiedi.
Burger (1971) first proposed the B. neuwiedi group based on morphological traits grouping B. neuwiedi with B. itapetiningae and B. iglesiasi. Werman (1992), based on morphology and protein electrophoresis, expanded the B. neuwiedi group to include a wider assemblage composed of the species with a divided lacunolabial scale, i.e. B. alternatus, B. erythromelas, B. itapetiningae and B. neuwiedi.