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Cyprinella alvarezdelvillari, a New Cyprinid Fish from Río Nazas of México, with a Key to the Lepida Clade

Salvador Contreras-Balderas and María de Lourdes Lozano
Copeia
Vol. 1994, No. 4 (Dec. 19, 1994), pp. 897-906
DOI: 10.2307/1446712
Stable URL: http://www.jstor.org/stable/1446712
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Cyprinella alvarezdelvillari, a New Cyprinid Fish from Río Nazas of México, with a Key to the Lepida Clade
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Abstract

Cyprinella alvarezdelvillari is a new species of cyprinid fish described from Arroyo del Peñon de Covadonga headwaters (Balneario La Concha springs to 8 km downstream), Río Nazas, Durango, México. It is a dwarfed member of the lepida species group, differing from all others by the following characteristics: eye diameter larger than length of snout; heavy tuberculation over most of body and fins in breeding males, especially chin and center of dorsal area of pectoral fin; small spines on lips, on uppermost peduncle scale row, and over entire lachrymal; breast naked; a short vomer; lateral dark band as wide as eye or wider, most noticeable at midbody. Breeding males golden to reddish bronze on body, brighter on cheek and opercular area, with white borders on anal and paired fins; and a black overcast at peak breeding colors, caused by appearance of sparse large melanophores. Comments are presented on other members of the group, and a key is provided for their identification. /// Cyprinella alvarezdelvillari n. sp. de pez cipríńido, se describe del Arroyo del Peñón de Covadonga (Ojo del Balneario La Concha, a 8 km río abajo), en el Río Nazas de Durango, México. Es un miembro enanizado del grupo de especies lepida; difiere de todos ellos por tener: ojo mayor que el rostro; tuberculación fuerte en todo el cuerpo y aletas, especialmente el centro dorsal de la aleta pectoral, mentón, y espinoletas en los labios; vomer corto; su estola es igual o mas ancha que el ojo, sobre todo al centro del cuerpo; espinoletas en la hilera superior de escamas del pedúnculo, así como en todo el lacrimal; pecho sin escamas; machos maduros dorado a bronce rojizos, más brillante en la mejilla y área opercular; bordes blancos en aletas pares y anal; machos negruzcos conforme al grado de maduréz por la aparición de grandes melanóforos dispersos. Se presentan comentarios sobre otras especies del grupo con una clave para identificación de sus especies.

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