Author: Crampton, de Santana, Waddell & Lovejoy, 2017
Comments: The type series was sampled in tropical forest and savanna near Riberalta, Bolivia from small low-conductivity clearwater and blackwater terra firme streams. Found mostly commonly in marginal root mats, and in emergent or submerged aquatic vegetation. Recorded water parameters at the sampling sites included the following: conductivity 5-15 μS/cm, dissolved oxygen 3.0-5.0 mg/l, temperature 22-24°C, and pH 5.2-5.5.  Co-inhabits in geographical sympatry and ecological syntopy with the following species occurring in terra firme stream: <i>B. brevirostris</i>, <i>B. sullivani</i>, and <i>B. walteri</i>.  In the region of the type locality, it is allotopic with whitewater floodplain species such as <i>B. arrayae</i>, <i>B. bombilla</i>, and <i>B. pinnicaudatus</i>. It co-occurs in geographical sympatry with its sister species <i>B. arrayae</i>, but the species exhibit a noteworthy difference in ecological distribution. <i>B. alberti</i> occupies the  low conductivity (ca. 5-15 μScm-1) terra firme forest and savanna streams, while <i>B. arrayae</i> mainly inhabits higher-conductivity whitewater floodplain systems (ca. 150 μScm-1 at the time of sampling). <i>B. alberti</i>  was collected together with <i>B. arrayae</i>  (and also <i>B. pinnicaudatus</i>) in the lower reaches of terra firme streams, at the ecotone with the río Beni floodplain (Ref. 116763).