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Redescription of Corydoras guapore Knaack, 1961 (Siluriformes:Callichthyidae), a midwater Corydoradinae species from the rio Guaporé basin
Luiz Fernando Caserta Tencatt and Carla Simone Pavanelli. Neotropical Ichthyology, 13(2): 287-296, 2015.

Corydoras guapore was described from the rio Guaporé, Rondônia State, Brazil, based only in three specimens, two of
them merely examined alive in an aquarium and apparently not preserved posteriorly. The current location of these two
paratypes is uncertain. In the original description, no standard diagnosis was presented and the descriptive information
available is scarce and based only in external morphology. Thus, the aim of this study is to provide a redescription of C.
guapore based in several topotypes. Corydoras guapore can be distinguished from its congeners by the presence of a short
mesethmoid, with the anterior tip poorly developed; posterior margin of pectoral spine with conical serrations directed
towards the origin of the spine; and by the lateral portion of caudal peduncle almost entirely blackened. Information about
C. guapore ecology and conservation status are also provided.

Open access paper.

http://www.scielo.br/pdf/ni/v13n2/1679- ... -00287.pdf

If folks haven't had a chance to read this please take a look! Luiz Tencatt is a close friend and has done an excellent job on this redescription. The original description was done using only 1 holotype and 2 live aquarium fish paratypes that were (presumably) not preserved and made available at any time. Luiz has gone to great lengths to examine a much larger number of specimens and present new and up to date information on this species. This paper really cements the original description and makes the sp. C.guapore scientifically valid by today's stricter standards.
What is truly great is to see a description in which the scientist collaborates with hobbyists to include not only the photos and information about the preserved specimens, but hobbyist photos of the live fish and the location from where they are collected. Parabéns(congratulations) Luiz and Hans Evers, this is a fantastic article!