On the lectotype designation of Bryconamericus rubropictus (Berg) (Characiformes, Characidae, Stevardiinae).

The lectotype specimen of Bryconamericus rubropictus (Berg) and its designation have remained imprecisely documented since its publication. The lack of a photograph or an unambiguous illustration, correct size, inaccurate labelling, and proper specimen separation has led to an uncertainty about the identity and nomenclatural status of the lectotype. We recovered and provided detailed morphological data on the specimen that must be recognised as the lectotype. This contribution brings stability and clarity on the nomenclatural status of the species and its type material.

First evidence of regional migration of the copper shark Carcharhinus brachyurus (Günther, 1870) in the Southwest Atlantic.

Regional migration of the copper shark Carcharhinus brachyurus was recorded for the first time in the Southwest Atlantic (SWA) from Argentina (latitude: -38.1037, longitude: -57.5371) to Brazil (latitude: -20.6833, longitude: -40.2846) as a result of a citizen science tagging project. The recaptured specimen was a female (103 kg weight), with 18 developing embryos within the uterus. The total distance was at least 2566 km, and it is the longest ever recorded for the species. Furthermore, it extends its northern distribution in the SWA.