Taxonomic discrimination and identification of extant blue catfishes (Siluriformes: Ictaluridae: Ictalurus furcatus Group)

Three species of the Ictalurus furcatus Group (genus Ictalurus) are recognized: I. furcatus, I. meridionalis and I. balsanus. These species are differentially diagnosed by characters of the bony skeleton, fin-ray and vertebral counts, morphometrics and coloration. Ictalurus balsanus is distinctive i...

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Bibliographische Detailangaben
Veröffentlicht in:	Proceedings of the Academy of Natural Sciences of Philadelphia. - Academy of Natural Sciences of Philadelphia, 1841. - 159(2010) vom: Okt., Seite 67-82
1. Verfasser:	Rodiles-Hernández, Rocío (VerfasserIn)
Weitere Verfasser:	Lundberg, John G., Sullivan, John P.
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2010
Zugriff auf das übergeordnete Werk:	Proceedings of the Academy of Natural Sciences of Philadelphia
Schlagworte:	Biological sciences Applied sciences Business Philosophy Physical sciences Mathematics


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100	1		\|a Rodiles-Hernández, Rocío \|e verfasserin \|4 aut
245	1	0	\|a Taxonomic discrimination and identification of extant blue catfishes (Siluriformes: Ictaluridae: Ictalurus furcatus Group)
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520			\|a Three species of the Ictalurus furcatus Group (genus Ictalurus) are recognized: I. furcatus, I. meridionalis and I. balsanus. These species are differentially diagnosed by characters of the bony skeleton, fin-ray and vertebral counts, morphometrics and coloration. Ictalurus balsanus is distinctive in having a relatively short supraoccipital process, anterior nuchal plate and posterior cleithral process, weakly developed pectoral-fin spine ornamentation, and an elongated posterolateral premaxillary process. Ictalurus furcatus and I. meridionalis are closely similar species but are clearly distinguished by features of the pectoral-fin spine ornamentation, supraoccipital process shape and texture, posterior cleithral process shape, numbers of anal-fin rays and vertebrae, and related proportional measurements of anal-fin and caudal peduncle length. Apparent differences among the three species in maximum size and coloration are also noted. A limited sample of molecular sequence data from the 12S/16S mitochondrial DNA loci is consistent with morphology-based results indicating that I. meridionalis is a species distinct from I. furcatus, and that I. balsanus is the most divergent species of the three. Ictalurus furcatus and I. meridionalis exhibit interriver basin variation in numbers of vertebrae and anal-fin rays. Se reconocen tres especies del grupo Ictalurus furcatus (género Ictalurus): I. furcatus, I. meridionalis e I. balsanus. Los caracteres diagnósticos de estas especies se encuentran en los huesos del esqueleto, en el conteo de vértebras y radios anales, en la morfometría y en la coloración. Ictalurus balsanus tiene un proceso más corto en el supraoccipital, en la placa anterior de la nuca y en el poscleitro; presenta escasas ornamentaciones en la espina de la aleta pectoral y un alargado proceso posterior del premaxilar. Ictalurus furcatus e I. meridionalis son especies muy similares pero se distinguen claramente por la ornamentación de la espina de la aleta pectoral, por la forma y textura del proceso supraoccipital y la forma del proceso postcleitral; así como, por el número de vértebras y radios anales y por la longitud de la aleta anal y del pedúnculo caudal. Las tres especies también presentan diferencias en la talla máxima y en la coloración del cuerpo. Los resultados del análisis del ADN mitocondrial (12S y 16S), de una muestra limitada, son compatibles con los resultados morfológicos: I. meridionalis es una especie distinta de I. furcatus; I. balsanus es la especie más divergente de las tres. I. furcatus e I. meridionalis presentan variaciones, entre cuencas hidrográficas, en cuanto al número de vértebras y radios de la aleta anal.
540			\|a © 2010, Academy of Natural Sciences of Philadelphia
650		4	\|a Biological sciences \|x Biology \|x Zoology \|x Animals \|x Fish \|x Catfish
650		4	\|a Applied sciences \|x Food science \|x Foodstuffs \|x Food \|x Beverages \|x Alcoholic beverages \|x Fermented beverages \|x Beers \|x Ales
650		4	\|a Biological sciences \|x Biology \|x Anatomy \|x Body tissues \|x Connective tissues \|x Bones \|x Spine \|x Vertebrae
650		4	\|a Biological sciences \|x Biology \|x Anatomy \|x Body tissues \|x Connective tissues \|x Bones \|x Skull
650		4	\|a Biological sciences \|x Biology \|x Zoology \|x Animals \|x Fish \|x Freshwater fishes
650		4	\|a Business \|x Industry \|x Industrial sectors \|x Manufacturing industries \|x Consumer goods industries \|x Clothing industry \|x Clothing \|x Clothing accessories \|x Jewelry \|x Pectorals
650		4	\|a Biological sciences \|x Biology \|x Botany \|x Plant physiology \|x Vascular tissues \|x Xylem \|x Secondary xylem \|x Wood \|x Balsa
650		4	\|a Philosophy \|x Applied philosophy \|x Philosophy of science \|x Scientific method \|x Hypothesis testing \|x T tests
650		4	\|a Physical sciences \|x Earth sciences \|x Geography \|x Geomorphology \|x Geologic provinces \|x Structural basins \|x River basins
650		4	\|a Mathematics \|x Applied mathematics \|x Statistics \|x Frequency distribution
655		4	\|a research-article
700	1		\|a Lundberg, John G. \|e verfasserin \|4 aut
700	1		\|a Sullivan, John P. \|e verfasserin \|4 aut
773	0	8	\|i Enthalten in \|t Proceedings of the Academy of Natural Sciences of Philadelphia \|d Academy of Natural Sciences of Philadelphia, 1841 \|g 159(2010) vom: Okt., Seite 67-82 \|w (DE-627)477991068 \|w (DE-600)2174963-2 \|x 19385293 \|7 nnns
773	1	8	\|g volume:159 \|g year:2010 \|g month:10 \|g pages:67-82
856	4	0	\|u https://www.jstor.org/stable/41446113 \|3 Volltext
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952			\|d 159 \|j 2010 \|c 10 \|h 67-82