Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013
Gephyrocharax torresi Vanegas-Ríos, Azpelicueta, Mirande & Gonzales, 2013 (Figs. 28–29) Gephyrocharax torresi Vanegas-Ríos, Azpelicueta, Mirande & Gonzales, 2013: 276 –280, figs. 1–6 [original description, holotype UIST 1767, type locality: Colombia, Santander, El Carmen, Magdalena River bas...
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Biodiversity Taxonomy Animalia Chordata Actinopterygii Characiformes Characidae Gephyrocharax Gephyrocharax torresi |
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Biodiversity Taxonomy Animalia Chordata Actinopterygii Characiformes Characidae Gephyrocharax Gephyrocharax torresi Vanegas-Ríos, James A. Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013 |
topic_facet |
Biodiversity Taxonomy Animalia Chordata Actinopterygii Characiformes Characidae Gephyrocharax Gephyrocharax torresi |
description |
Gephyrocharax torresi Vanegas-Ríos, Azpelicueta, Mirande & Gonzales, 2013 (Figs. 28–29) Gephyrocharax torresi Vanegas-Ríos, Azpelicueta, Mirande & Gonzales, 2013: 276 –280, figs. 1–6 [original description, holotype UIST 1767, type locality: Colombia, Santander, El Carmen, Magdalena River basin, La Colorada River basin, Cascajales River system, Sucio River system, Caño Volador, 6 ° 39 '56,44"N 73 ° 34 '47,36"W, approximately 338 m a. s. l.]. Thomaz, Arcila, Ortí & Malabarba, 2015: Add. File 5 [tentative classification]. Diagnosis. Gephyrocharax torresi differs from its congeners (except G. melanocheir ) by the adipose fin absent or vestigial ( vs . adipose fin present) and the fan-shaped structure of adult males, formed on the distal portion of the outermost branched pectoral-fin ray. From most of its congeners it is distinguished by lacking terminal lateral-line tube between caudal-fin rays 10 and 11, except G. melanocheir , G. sinuensis , and G. v a l e n c i a . The whitish area or dark blotch pigmenting the distal portion of the outermost branched pectoral-fin ray of adult males also differentiates G. torresi from almost all its congeners (except G. martae and G. melanocheir ). The species is further distinguished from G. atracaudatus , G. chocoensis , G. intermedius , G. major , and G. venezuelae by the externally developed urogenital papillae ( vs . this papillae not externally developed). The anterior fontanel of adult specimens reduced or extremely absent by the extensive contact between frontals medially differentiates G. torresi from G. caucanus , G. melanocheir , and G. v a l en c i a ( vs . anterior fontanel well developed or, when frontals slightly contacting anterior to epiphyseal bar, forming a medium-sized opening). Gephyrocharax torresi also is distinguished from G. atracaudatus , G. caucanus , G. chocoensis , G. intermedius , G. major , and G. venezuelae by the gill-gland length (6.0– 10.3 % SL vs . 0.5–5.4 % SL). Description. This species was recently described by Vanegas-Ríos et al. (2013). Distribution. Gephyrocharax torresi is only known from the Sucio River basin (Magdalena basin) in Colombia (Fig. 1). Remarks. During the reexamination of the type series of G. t o r re s i , the absence or fusion of the fourth infraorbital (on both sides of head) present in larger specimens were found in the 60 % of the specimens. This variation was not noticed in the species description (Vanegas-Ríos et al. 2013). The loss of the fourth infraorbital cannot be used as diagnostic of G. torresi at present time, because it needs to be further studied to clarify whether this is intraspecifically variable or not. Nevertheless, it would be recommendable to consider this feature in subsequent comparisons between this species and G. melanocheir . Some specimens from the Topón River in Santander, which is situated at an intermediate locality between the distributional range of G. melanocheir and G. t o r re s i , were identified as the earlier species (ICNMHN, 17777, 17790, 17817, and 17826). These specimens were not analyzed by Vanegas-Ríos et al. (2013) in their comparison of both species. Material examined. All specimens from Colombia, Santander: UIST 1767, holotype of Gephyrocharax torresi , 36.7 mm SL, male, El Carmen, Magdalena River basin, La Colorada River basin, Cascajales River system, Sucio River basin, Caño Volador, 639 ' 56.44 "N 7334 ' 47.36 "W, approximately 338 m a. s. l. CI-FML 6105 (previously AI 294), 2, 34.0–36.0 mm SL; MLP 10518 (previously AI 293), 1 c&s paratype, 34.7 mm SL; UIST 1751, 19, 26.3–37.3 mm SL (1 c&s 36.0 mm SL), El Carmen, Magdalena River basin, La Colorada River basin, Cascajales River system, Sucio River under bridge to Vereda Islandia, 641 ' 14.6 "N 7335 ' 15.10 "W, approximately 280 m a. s. l. MLP 10519 (previously AI 295), 2, 35.1 –39.0 mm SL; UIST 1766, 12, 32.0–42.0 mm SL, collected with the holotype. : Published as part of Vanegas-Ríos, James A., 2016, Taxonomic review of the Neotropical genus Gephyrocharax Eigenmann, 1912 (Characiformes, Characidae, Stevardiinae) in Zootaxa 4100 (1) on pages 65-66, DOI: 10.11646/zootaxa.4100.1.1, http://zenodo.org/record/261565 : {"references": ["Vanegas-Rios, J. A., Azpelicueta, M. M., Mirande, J. M. & Gonzales, M. D. G. (2013) Gephyrocharax torresi (Characiformes: Characidae: Stevardiinae), a new species from the rio Cascajales basin, rio Magdalena system, Colombia. Neotropical Ichthyology, 11 (2), 275 - 284. http: // dx. doi. org / 10.1590 / S 1679 - 62252013000200005", "Thomaz, A. T., Arcila, D., Orti, G. & Malabarba, L. R. (2015) Molecular phylogeny of the subfamily Stevardiinae Gill, 1858 (Characiformes: Characidae): classification and the evolution of reproductive traits. BMC Evolutionary Biology, 15, 146. http: // dx. doi. org / 10.1186 / s 12862 - 015 - 0403 - 4"]} |
format |
Text |
author |
Vanegas-Ríos, James A. |
author_facet |
Vanegas-Ríos, James A. |
author_sort |
Vanegas-Ríos, James A. |
title |
Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013 |
title_short |
Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013 |
title_full |
Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013 |
title_fullStr |
Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013 |
title_full_unstemmed |
Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013 |
title_sort |
gephyrocharax torresi vanegas-rios, azpelicueta, mirande & gonzales 2013 |
publisher |
Zenodo |
publishDate |
2016 |
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https://dx.doi.org/10.5281/zenodo.6058561 https://zenodo.org/record/6058561 |
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Islandia |
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ftdatacite:10.5281/zenodo.6058561 2023-05-15T16:56:46+02:00 Gephyrocharax torresi Vanegas-Rios, Azpelicueta, Mirande & Gonzales 2013 Vanegas-Ríos, James A. 2016 https://dx.doi.org/10.5281/zenodo.6058561 https://zenodo.org/record/6058561 unknown Zenodo http://zenodo.org/record/261565 http://publication.plazi.org/id/FF88BA0162509155FFD9FF8BFFDDFF85 http://zoobank.org/E69BBCC0-775F-4F5C-B125-B890DE0FF7FF https://zenodo.org/communities/biosyslit https://dx.doi.org/10.11646/zootaxa.4100.1.1 http://zenodo.org/record/261565 http://publication.plazi.org/id/FF88BA0162509155FFD9FF8BFFDDFF85 https://dx.doi.org/10.5281/zenodo.261593 https://dx.doi.org/10.5281/zenodo.261594 https://dx.doi.org/10.5281/zenodo.261566 http://zoobank.org/E69BBCC0-775F-4F5C-B125-B890DE0FF7FF https://dx.doi.org/10.5281/zenodo.6058560 https://zenodo.org/communities/biosyslit Open Access Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode cc0-1.0 info:eu-repo/semantics/openAccess CC0 Biodiversity Taxonomy Animalia Chordata Actinopterygii Characiformes Characidae Gephyrocharax Gephyrocharax torresi article-journal ScholarlyArticle Taxonomic treatment Text 2016 ftdatacite https://doi.org/10.5281/zenodo.6058561 https://doi.org/10.11646/zootaxa.4100.1.1 https://doi.org/10.5281/zenodo.261593 https://doi.org/10.5281/zenodo.261594 https://doi.org/10.5281/zenodo.261566 https://doi.org/10.5281/zenodo.6058560 2022-04-01T10:04:06Z Gephyrocharax torresi Vanegas-Ríos, Azpelicueta, Mirande & Gonzales, 2013 (Figs. 28–29) Gephyrocharax torresi Vanegas-Ríos, Azpelicueta, Mirande & Gonzales, 2013: 276 –280, figs. 1–6 [original description, holotype UIST 1767, type locality: Colombia, Santander, El Carmen, Magdalena River basin, La Colorada River basin, Cascajales River system, Sucio River system, Caño Volador, 6 ° 39 '56,44"N 73 ° 34 '47,36"W, approximately 338 m a. s. l.]. Thomaz, Arcila, Ortí & Malabarba, 2015: Add. File 5 [tentative classification]. Diagnosis. Gephyrocharax torresi differs from its congeners (except G. melanocheir ) by the adipose fin absent or vestigial ( vs . adipose fin present) and the fan-shaped structure of adult males, formed on the distal portion of the outermost branched pectoral-fin ray. From most of its congeners it is distinguished by lacking terminal lateral-line tube between caudal-fin rays 10 and 11, except G. melanocheir , G. sinuensis , and G. v a l e n c i a . The whitish area or dark blotch pigmenting the distal portion of the outermost branched pectoral-fin ray of adult males also differentiates G. torresi from almost all its congeners (except G. martae and G. melanocheir ). The species is further distinguished from G. atracaudatus , G. chocoensis , G. intermedius , G. major , and G. venezuelae by the externally developed urogenital papillae ( vs . this papillae not externally developed). The anterior fontanel of adult specimens reduced or extremely absent by the extensive contact between frontals medially differentiates G. torresi from G. caucanus , G. melanocheir , and G. v a l en c i a ( vs . anterior fontanel well developed or, when frontals slightly contacting anterior to epiphyseal bar, forming a medium-sized opening). Gephyrocharax torresi also is distinguished from G. atracaudatus , G. caucanus , G. chocoensis , G. intermedius , G. major , and G. venezuelae by the gill-gland length (6.0– 10.3 % SL vs . 0.5–5.4 % SL). Description. This species was recently described by Vanegas-Ríos et al. (2013). Distribution. Gephyrocharax torresi is only known from the Sucio River basin (Magdalena basin) in Colombia (Fig. 1). Remarks. During the reexamination of the type series of G. t o r re s i , the absence or fusion of the fourth infraorbital (on both sides of head) present in larger specimens were found in the 60 % of the specimens. This variation was not noticed in the species description (Vanegas-Ríos et al. 2013). The loss of the fourth infraorbital cannot be used as diagnostic of G. torresi at present time, because it needs to be further studied to clarify whether this is intraspecifically variable or not. Nevertheless, it would be recommendable to consider this feature in subsequent comparisons between this species and G. melanocheir . Some specimens from the Topón River in Santander, which is situated at an intermediate locality between the distributional range of G. melanocheir and G. t o r re s i , were identified as the earlier species (ICNMHN, 17777, 17790, 17817, and 17826). These specimens were not analyzed by Vanegas-Ríos et al. (2013) in their comparison of both species. Material examined. All specimens from Colombia, Santander: UIST 1767, holotype of Gephyrocharax torresi , 36.7 mm SL, male, El Carmen, Magdalena River basin, La Colorada River basin, Cascajales River system, Sucio River basin, Caño Volador, 639 ' 56.44 "N 7334 ' 47.36 "W, approximately 338 m a. s. l. CI-FML 6105 (previously AI 294), 2, 34.0–36.0 mm SL; MLP 10518 (previously AI 293), 1 c&s paratype, 34.7 mm SL; UIST 1751, 19, 26.3–37.3 mm SL (1 c&s 36.0 mm SL), El Carmen, Magdalena River basin, La Colorada River basin, Cascajales River system, Sucio River under bridge to Vereda Islandia, 641 ' 14.6 "N 7335 ' 15.10 "W, approximately 280 m a. s. l. MLP 10519 (previously AI 295), 2, 35.1 –39.0 mm SL; UIST 1766, 12, 32.0–42.0 mm SL, collected with the holotype. : Published as part of Vanegas-Ríos, James A., 2016, Taxonomic review of the Neotropical genus Gephyrocharax Eigenmann, 1912 (Characiformes, Characidae, Stevardiinae) in Zootaxa 4100 (1) on pages 65-66, DOI: 10.11646/zootaxa.4100.1.1, http://zenodo.org/record/261565 : {"references": ["Vanegas-Rios, J. A., Azpelicueta, M. M., Mirande, J. M. & Gonzales, M. D. G. (2013) Gephyrocharax torresi (Characiformes: Characidae: Stevardiinae), a new species from the rio Cascajales basin, rio Magdalena system, Colombia. Neotropical Ichthyology, 11 (2), 275 - 284. http: // dx. doi. org / 10.1590 / S 1679 - 62252013000200005", "Thomaz, A. T., Arcila, D., Orti, G. & Malabarba, L. R. (2015) Molecular phylogeny of the subfamily Stevardiinae Gill, 1858 (Characiformes: Characidae): classification and the evolution of reproductive traits. BMC Evolutionary Biology, 15, 146. http: // dx. doi. org / 10.1186 / s 12862 - 015 - 0403 - 4"]} Text Islandia DataCite Metadata Store (German National Library of Science and Technology) |