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PARTIALLY ABBREVIATED LARVAL DEVELOPMENT IN AN UNDESCRIBED FRESHWATER PALAEMONID PRAWN OF THE GENUS MACROBRACHIUM FROM CHIAPAS, MEXICO

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Abbreviated larval development is a characteristic of several species of palaemonid shrimps. There are at least 29 species of freshwater palaemonids in South America with such development, but none has been described from Mexico. In the present work, the partially abbreviated larval development of a freshwater prawn from Perla de Acapulco, Chiapas, Mexico, located at about 250 km from the coast, is described and illustrated in detail. The larvae pass through three zoeal stages before becoming postlarvae. Each females carries an average of 25 large eggs, which vary in size from 2.0 to 2.8 mm. The larval development is compared with that of some related South American species that are known to possess abbreviated larval life.

Algunas especies de langostinos presentan un desarrollo larval abreviado. En America del Sur existen alrededor de 29 especies de langostinos de agua dulce que presentan un desarrollo larval abreviado o semiabreviado. En el presente trabajo se describe el desarrollo semiabreviado de una posible nueva especie de langostino originaria de la comunidad de Perla de Acapulco, Chiapas, México, localizada a 250 km lejos de la costa. Las larvas pasan a traves de tres estados larvarios antes de convertirse en postlarvas. Las hembras tienen en promedio 25 huevos con un tamaño que va de 2.0 a 2.8 mm. El desarrollo larval es comparado con el de otras especies sudamericanas que presentan un desarrollo larval abreviado.

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