A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina
We describe Hoplias mbigua , a new species of the genus from the lower Paraná, in Misiones, with tooth-bearing plates on dorsal surface of basihyal and basibranchi- als and medial margins of contralateral dentaries converging towards the mandibular symphy- sis in ventral view, characters that permit to include the species in the H . malabaricus group. The presence of five brown bands transversely placed on lower jaw distinguishes the new species from its congeners, excluding H . microlepis (vs. lower jaw straight or with small black or brown dots uniformly distributed). The number of circunpeduncular scales in H . mbigua is 20 whereas H. teres and H. malabaricus have 18 circunpeduncular scales and H . microlepis 22-24 and 12-16 gill rakers on first epibranchial (vs. about 9). Hoplias mbigua has convex dorsal profile between head and dorsal fin whereas H . teres has straight dorsal profile. Hoplias mbigua has a large supraopercle, with its anterior margin contacting the in- fraorbitals 5 and 6 whereas H . cf. malabaricus has a short supraopercle, with an anterior margin scarcely extended before anterior opercular margin. Hoplias mbigua has a large tooth- plate on basihyal and basibranchials instead of two lines of tooth-plates at sides of bones in H . cf. malabaricus .
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Fundación Miguel Lillo
2015
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rev-actazoologica-ar-article-1482018-11-01T13:24:59Z A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina Una nueva especie del género Hoplias (Characiformes, Erythrinidae), una tararira del Río Paraná bajo, en Misiones, Argentina Azpelicueta, M. de las Mercedes Benítez, Mauricio F. Aichino, Danilo R. Mendez, C. M. Damián Characiformes Hoplias bajo Paraná Characiformes Hoplias lower Paraná We describe Hoplias mbigua , a new species of the genus from the lower Paraná, in Misiones, with tooth-bearing plates on dorsal surface of basihyal and basibranchi- als and medial margins of contralateral dentaries converging towards the mandibular symphy- sis in ventral view, characters that permit to include the species in the H . malabaricus group. The presence of five brown bands transversely placed on lower jaw distinguishes the new species from its congeners, excluding H . microlepis (vs. lower jaw straight or with small black or brown dots uniformly distributed). The number of circunpeduncular scales in H . mbigua is 20 whereas H. teres and H. malabaricus have 18 circunpeduncular scales and H . microlepis 22-24 and 12-16 gill rakers on first epibranchial (vs. about 9). Hoplias mbigua has convex dorsal profile between head and dorsal fin whereas H . teres has straight dorsal profile. Hoplias mbigua has a large supraopercle, with its anterior margin contacting the in- fraorbitals 5 and 6 whereas H . cf. malabaricus has a short supraopercle, with an anterior margin scarcely extended before anterior opercular margin. Hoplias mbigua has a large tooth- plate on basihyal and basibranchials instead of two lines of tooth-plates at sides of bones in H . cf. malabaricus . Una nueva especie del género Hoplias (Characiformes, Erythrinidae), una tararira del Río Paraná bajo, en Misiones, Argentina”. Describimos Hoplias mbigua , una nue- va especie del género, procedente del bajo Paraná en Misiones, con dientes en la superficie dorsal de los basibranquiales y basihial y los márgenes del dentario convergiendo hacia la sínfisis mandibular en vista ventral, caracteres que permiten incluirla en el grupo de H . malabaricus . La presencia de 5 bandas pardas transversales en la mandíbula inferior distin- guen esta especie de sus congéneres, excluyendo H . microlepis (vs. mandíbula inferior lisa o con pequeñas manchas negras o pardas uniformemente distribuidas). El número de escamas circunpedunculares en H . mbigua es 20 mientras que H. teres y H. malabaricus tienen 18 y H . microlepis 22-24 escamas circunpedunculares y 12-16 rastrillos branquiales en el primer epibranquial (vs. alrededor de 9). Hoplias mbigua tiene perfil dorsal convexo entre cabeza y aleta dorsal y H . teres tiene perfil dorsal recto entre cabeza y aleta dorsal. Hoplias mbigua tiene supraopérculo grande, con su margen anterior en contacto con los infraorbita- les 5 y 6 mientras H . cf. malabaricus tiene supraopérculo corto, con el margen anterior apenas extendido delante del margen anterior del opérculo. Hoplias mbigua tiene placa grande con dientes, sobre basihial y basibranquiales en lugar de las dos hileras de placas dentadas en los laterales de los huesos en H . cf. malabaricus Fundación Miguel Lillo 2015-12-07 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://www.lillo.org.ar/journals/index.php/acta-zoologica-lilloana/article/view/148 Acta Zoológica Lilloana; Acta Zoológica Lilloana 59 (1-2) (2015); 71-82 Acta Zoológica Lilloana; Acta Zoológica Lilloana 59 (1-2) (2015); 71-82 Acta Zoológica Lilloana; Acta Zoológica Lilloana 59 (1-2) (2015); 71-82 1852-6098 spa http://www.lillo.org.ar/journals/index.php/acta-zoologica-lilloana/article/view/148/207 |
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Azpelicueta, M. de las Mercedes Benítez, Mauricio F. Aichino, Danilo R. Mendez, C. M. Damián |
| spellingShingle |
Azpelicueta, M. de las Mercedes Benítez, Mauricio F. Aichino, Danilo R. Mendez, C. M. Damián A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina |
| author_facet |
Azpelicueta, M. de las Mercedes Benítez, Mauricio F. Aichino, Danilo R. Mendez, C. M. Damián |
| author_sort |
Azpelicueta, M. de las Mercedes |
| title |
A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina |
| title_short |
A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina |
| title_full |
A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina |
| title_fullStr |
A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina |
| title_full_unstemmed |
A new species of the genus Hoplias (Characiformes, Erythrinidae), a tararira from the lower Paraná River, in Misiones, Argentina |
| title_sort |
new species of the genus hoplias (characiformes, erythrinidae), a tararira from the lower paraná river, in misiones, argentina |
| description |
We describe Hoplias mbigua , a new species of the genus from the lower Paraná, in Misiones, with tooth-bearing plates on dorsal surface of basihyal and basibranchi- als and medial margins of contralateral dentaries converging towards the mandibular symphy- sis in ventral view, characters that permit to include the species in the H . malabaricus group. The presence of five brown bands transversely placed on lower jaw distinguishes the new species from its congeners, excluding H . microlepis (vs. lower jaw straight or with small black or brown dots uniformly distributed). The number of circunpeduncular scales in H . mbigua is 20 whereas H. teres and H. malabaricus have 18 circunpeduncular scales and H . microlepis 22-24 and 12-16 gill rakers on first epibranchial (vs. about 9). Hoplias mbigua has convex dorsal profile between head and dorsal fin whereas H . teres has straight dorsal profile. Hoplias mbigua has a large supraopercle, with its anterior margin contacting the in- fraorbitals 5 and 6 whereas H . cf. malabaricus has a short supraopercle, with an anterior margin scarcely extended before anterior opercular margin. Hoplias mbigua has a large tooth- plate on basihyal and basibranchials instead of two lines of tooth-plates at sides of bones in H . cf. malabaricus . |
| publisher |
Fundación Miguel Lillo |
| publishDate |
2015 |
| url |
http://www.lillo.org.ar/journals/index.php/acta-zoologica-lilloana/article/view/148 |
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