Friday, December 6, 2019

[Ichthyology • 2019] A Taxonomic Revision of Sturisomatichthys Isbrücker and Nijssen, 1979 (Loricariidae: Loricariinae), with Descriptions of Three New Species

Sturisomatichthys guaitipan
Londoño-Burbano & Reis, 2019

A taxonomic revision of Sturisomatichthys is presented. A total of 383 specimens including both type and non-type specimens of all valid species were examined. Sturisomatichthys was found to encompass ten valid species: Sturisomatichthys aureus, S. caquetae, S. citurensis, S. dariensis, S. festivus, S. frenatus, S. kneri, S. leightoni, S. panamensis, and S. tamanae. In addition, three new species are described: Sturisomatichthys reinae, new species, from the Baudó River, in northwestern Colombia, belonging to the Caribbean slope of the continent; Sturisomatichthys guaitipan, new species, from the upper and middle Magdalena River basin, Colombia; and Sturisomatichthys varii, new species, from the San Juan River basin in western Colombia, on the Pacific slope. Sturisomatichthys caquetae, from the Morelia River, upper Amazon, is transferred back from Sturisoma, and S. leightoni was found to be distributed, besides the Magdalena-Cauca basin, in the Orinoco basin; thus, Sturisomatichthys is shown to be distributed in both trans- and cis-Andean drainages. A neotype is designated for S. aureus from the lower Magdalena basin. New records of localities in the northwestern region of South America, as well as the redescription and taxonomic comments on all valid species, are provided. Maps with the species distributions and a key for identification of the species are provided.

Sturisomatichthys Isbrücker and Nijssen, 1979 

 Sturisomatichthys Isbrucker and Nijssen, in Isbrücker , 1979:91
 (type species: Oxyloricaria leightoni Regan, 1912,
 by original designation; gender: masculine). 

Included taxa.— Sturisomatichthys aureus; S. caquetae; S. citurensis; S. dariensis; S. festivus; S. frenatus; S. kneri; S. leightoni; S. panamensis; S. tamanae; Sturisomatichthys guaitipan, new species; Sturisomatichthys reinae, new species; Sturisomatichthys varii, new species.

Placement in Loricariinae.—Sturisomatichthys belongs to the Farlowellina, along with Aposturisoma; Farlowella (type genus); Lamontichthys; Pterosturisoma; and Sturisoma.

Sturisomatichthys aureus (Steindachner, 1900)

Sturisomatichthys caquetae (Fowler, 1945) 

Sturisomatichthys citurensis (Meek and Hildebrand, 1913) 

Sturisomatichthys dariensis (Meek and Hildebrand, 1913) 

Sturisomatichthys festivus (Myers, 1942) 

Sturisomatichthys frenatus (Boulenger, 1902) 

Sturisomatichthys kneri (Ghazzi, 2005) 

Sturisomatichthys leightoni (Regan, 1912) 

Sturisomatichthys panamensis (Eigenmann and Eigenmann, 1889)

Sturisomatichthys tamanae (Regan, 1912) 

Sturisomatichthys reinae, new species 

Etymology.—The specific name honors Mrs. Ruth Gisela Reina, late curator of fishes at STRI, for her contributions to the knowledge of fishes and invaluable help and assistance for several ichthyologists around the world during her time at the STRI.

Sturisomatichthys guaitipan, new species, holotype, ICNMHN 24055, 90.7 mm SL, Colombia, Cundinamarca, Apulo, Magdalena River basin, Calandaima River.
Photo by Henry Agudelo (ICNMHN).

Sturisomatichthys guaitipan, new species 

Etymology.—The specific epithet guaitipan honors Gaitana, an indigenous heroine from the 16th century, cacique of the Timaná tribe, who occupied the Colombian Andes in the upper Magdalena valley in the Meta department. Gaitana, or Guaitipan as she was also known, fought against the Spanish invasion that occurred in South America between 1539 and 1540, ending in her defeat due to treason by the cacique Matambo, who warned the Spanish army of the rebellion led by Gaitana. Finally in 1626, joining forces with the Pijaos, Panaes, and Pamaos, they obtained victory by expelling the Spanish from their region. 

Sturisomatichthys varii, new species

Etymology.—The specific name honors Richard P. Vari for his important and numerous contributions to the knowledge of Neotropical fishes, and for his interest in helping young ichthyologists pursue careers in science to continue to explore the diversity of such Neotropical fishes. Richard left an important legacy which, with no doubt, will help present and future ichthyologists in their research. The conclusion of this study would not have being possible without the selfless and extensive help received from Richard.

Alejandro Londoño-Burbano and Roberto E. Reis. 2019. A Taxonomic Revision of Sturisomatichthys Isbrücker and Nijssen, 1979 (Loricariidae: Loricariinae), with Descriptions of Three New Species. Copeia. 107(4); 764-806.  DOI: 10.1643/CI-19-226