A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South America
A new species of Bryconamericus (Characiformes, Characidae, Stevardiinae) is described from the Pacific coast of northwestern Ecuador, South America. The new species is distinguished from all congeners by the presence in males of bony hooks on the caudal fin rays (vs. absence). The different layers...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Museu de Ciències Naturals de Barcelona
2015-10-01
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| Series: | Animal Biodiversity and Conservation |
| Subjects: | |
| Online Access: | http://abc.museucienciesjournals.cat/files/ABC_38-2_pp_241-252.pdf |
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| author | Román–Valencia, C. Ruiz–C., R. I. Taphorn B., D. C. Jiménez–Prado, P. García–Alzate, C. A. |
| author_facet | Román–Valencia, C. Ruiz–C., R. I. Taphorn B., D. C. Jiménez–Prado, P. García–Alzate, C. A. |
| author_sort | Román–Valencia, C. |
| collection | DOAJ |
| description | A new species of Bryconamericus (Characiformes, Characidae, Stevardiinae) is described from the Pacific coast of northwestern Ecuador, South America. The new species is distinguished from all congeners by the presence in males of bony hooks on the caudal fin rays (vs. absence). The different layers of pigment that constitute the humeral spots have differing degrees of development and structure that are independent of each other. Brown melanophores are distributed in a thin, vertical, superficial layer of the epithelium (layer 1) and in another deeper (layer 2) that overlaps the first and is centered over the lateral–line. B. ecuadorensis has a horizontally oval or elliptical shape layer 2 pigment in the anterior humeral spot (vs. a rectangular or circular layer 2). The new species further differs in having an anterior extension of the caudal peduncle spot (vs. no anterior extension of the caudal peduncle spot) and by having a dark lateral stripe overlaid by the peduncular spot and by the regularly distributed pigmentation on scales on the sides of the body (vs. peduncular spot and other body pigments not superimposed over a dark lateral stripe). Hooks present on all fins of males (vs. hooks present only on anal and pelvic fins of males) distinguishes the new species from B. dahli, the only sympatric congener. Seven other diagnostic characters separating the new taxon from B. dahli are reported. We also include physical, chemical and biological habitat parameters and analyse the impacts from mining on this new species and other organisms present at the type locality. |
| first_indexed | 2024-12-22T07:02:03Z |
| format | Article |
| id | doaj.art-59def7221f7c4d6ba9889cb75454a6d7 |
| institution | Directory Open Access Journal |
| issn | 1578-665X |
| language | English |
| last_indexed | 2024-12-22T07:02:03Z |
| publishDate | 2015-10-01 |
| publisher | Museu de Ciències Naturals de Barcelona |
| record_format | Article |
| series | Animal Biodiversity and Conservation |
| spelling | doaj.art-59def7221f7c4d6ba9889cb75454a6d72022-12-21T18:34:47ZengMuseu de Ciències Naturals de BarcelonaAnimal Biodiversity and Conservation1578-665X2015-10-01382241252A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South AmericaRomán–Valencia, C.Ruiz–C., R. I.Taphorn B., D. C.Jiménez–Prado, P.García–Alzate, C. A.A new species of Bryconamericus (Characiformes, Characidae, Stevardiinae) is described from the Pacific coast of northwestern Ecuador, South America. The new species is distinguished from all congeners by the presence in males of bony hooks on the caudal fin rays (vs. absence). The different layers of pigment that constitute the humeral spots have differing degrees of development and structure that are independent of each other. Brown melanophores are distributed in a thin, vertical, superficial layer of the epithelium (layer 1) and in another deeper (layer 2) that overlaps the first and is centered over the lateral–line. B. ecuadorensis has a horizontally oval or elliptical shape layer 2 pigment in the anterior humeral spot (vs. a rectangular or circular layer 2). The new species further differs in having an anterior extension of the caudal peduncle spot (vs. no anterior extension of the caudal peduncle spot) and by having a dark lateral stripe overlaid by the peduncular spot and by the regularly distributed pigmentation on scales on the sides of the body (vs. peduncular spot and other body pigments not superimposed over a dark lateral stripe). Hooks present on all fins of males (vs. hooks present only on anal and pelvic fins of males) distinguishes the new species from B. dahli, the only sympatric congener. Seven other diagnostic characters separating the new taxon from B. dahli are reported. We also include physical, chemical and biological habitat parameters and analyse the impacts from mining on this new species and other organisms present at the type locality.http://abc.museucienciesjournals.cat/files/ABC_38-2_pp_241-252.pdfConservationTaxonomyTropical fishNew taxonBryconamericus ecuadorensis n. sp. |
| spellingShingle | Román–Valencia, C. Ruiz–C., R. I. Taphorn B., D. C. Jiménez–Prado, P. García–Alzate, C. A. A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South America Animal Biodiversity and Conservation Conservation Taxonomy Tropical fish New taxon Bryconamericus ecuadorensis n. sp. |
| title | A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South America |
| title_full | A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South America |
| title_fullStr | A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South America |
| title_full_unstemmed | A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South America |
| title_short | A new species of Bryconamericus (Characiformes, Stevardiinae, Characidae) from the Pacific coast of northwestern Ecuador, South America |
| title_sort | new species of bryconamericus characiformes stevardiinae characidae from the pacific coast of northwestern ecuador south america |
| topic | Conservation Taxonomy Tropical fish New taxon Bryconamericus ecuadorensis n. sp. |
| url | http://abc.museucienciesjournals.cat/files/ABC_38-2_pp_241-252.pdf |
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