KILLI - DATA SERIES, 2013, Vermeulen, Rivulus, Cynodonichthys, azurescens, pivijay, ribesrubrum, xi



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Killi-Data Series 2013 [as a print, ISBN 978-2-9547546-0-4, as a PDF document, ISBN 978-2-9547546-1-1]

Killi-Data Series 2013, 42-63, 10 figs., 5 tabs.

Four new species of Rivulus Poey, 1860, subgenus Cynodonichthys Meek, 1904 (Teleostei: Cyprinodontiformes: Rivulidae) from the Magdalena River Basin, Central Colombia, including notes on Rivulus (Cynodonichthys) elegans Steindachner, 1880.

Vermeulen, F.B.M. 

Abstract: Four new rivulid species are described: Rivulus (Cynodonichthys) azurescens, Rivulus (Cynodonichthys) pivijay, Rivulus (Cynodonichthys) ribesrubrum, and Rivulus (Cynodonichthys) xi. Rivulus azurescens and R. ribesrubrum belong to the R. elegans species-group. Rivulus pivijay and R. xi are closely related to the R. elegans species-group, but differ by: 1) a unique reticulate brown color pattern on the body (versus a pattern of red longitudinal stripes); 2) males with the caudal-fin without a yellow/orange posterior border (versus males with a yellow/orange posterior border); and 3) the presence of an ocellus (faint or weak in adult males) on the caudal peduncle in both sexes (versus absence of an ocellus in both sexes, except in females of R. magdalenae and R. boehlkei. Huber & Fels 1985. Some notes concerning R. (Cynodonichthys) elegans Steindachner, 1880 are included for comparison.