Corydoras brittoi

biology_ecology

Ecological notes. The type locality of Corydoras brittoi is located at 110 meters above sea level, and is a small clear water stream, with 2 - 3 m width and 0.5 - 2 m depth, with preserved riparian vegetation, swift water current, and bottom composed mainly of sand and dead leaves. Specimens of C. brittoi were observed at night during capture at shallow portions of the stream in small groups (5 - 15 individuals), and sometimes associated with a other new species described below.

Two new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the rio Madeira basin, Brazil

conservation

Conservation status. Corydoras brittoi is so far known only from the type-locality and its conservation status is uncertain based on the limited knowledge of its geographic distribution. However, considering that important threats to the species were not detected in the area, and that it occurs in a protected area (Reserva Extrativista Guariba Roosevelt), Corydoras brittoi would be classified as Least Concern (LC) according to the International Union for Conservation of Nature (IUCN) categories and criteria (IUCN Standards and Petitions Subcommittee, 2014).

Two new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the rio Madeira basin, Brazil

description

Description. Morphometric data presented in Table 1. Head compressed with acutely convex dorsal profile; triangular in dorsal view. Snout pointed and straight. Head profile nearly straight from tip of snout to anterior nare; ascending nearly straight from this point to tip of posterior process of parietosupraoccipital. Profile slightly convex along dorsal-fin base. Postdorsal-fin body profile nearly straight to adipose-fin spine; concave from this point to caudal-fin base. Ventral profile of body slightly convex from isthmus to base of first anal-fin ray; concave from this point to caudal-fin base. Body acutely elliptical in cross section at pectoral girdle, gradually becoming more compressed toward caudal fin. Eye rounded, located dorso-laterally on head; orbit delimited dorsally by lateral ethmoid, frontal and sphenotic, ventrally by infraorbitals. Anterior and posterior nares close to each other, only separated by flap of skin. Anterior naris tubular. Posterior naris relatively distant to anterodorsal margin of orbit, separated from it by distance equal to twice of naris diameter. Mouth small, subterminal, width nearly equal to bony orbit diameter. Maxillary barbel relatively la

Two new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the rio Madeira basin, Brazil

description

urn: lsid: zoobank. org: act: 3 F 9 B 3430 - 8 D 4 C- 4180 - 9 B 82 - 1 E 70648 E 7 BD 1 (Figs. 1 - 2 a, b, 3 a, c, 4, Table 1)

Two new species of Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae) from the rio Madeira basin, Brazil