Primer registro e histología básica del anfípodo terrestre Talitroides topitotum (Amphipoda: Talitridae), introducido en las zonas montañosas de Heredia, Costa Rica
Fecha
2013-11-20
Autores
Alfaro-Montoya, Jorge
Umaña Castro, Rodolfo
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Editor
Universidad Estatal a Distancia (Costa Rica)
Resumen
Este estudio documenta por primera vez la introducción del anfípodo
terrestre, Talitroides topitotum (Talitridae) en diversas zonas montañosas
de los cantones de San Rafael y Barva, Heredia, Costa Rica, con predominio
de juveniles y hembras adultas con y sin huevos. La especie es
de origen asiático y podría haber sido introducida asociada con plantas
exóticas. Se describen aspectos básicos de la histología de la especie,
incluyendo la estructura celular de los principales órganos: corazón, intestino,
hepatopáncreas, ovario, cordón nervioso, branquia y oosteguito.
Las hembras adultas presentan masivas formaciones de tejido conectivo
esponjoso rodeando el sistema digestivo y ovarios; los oocitos aparecen
en diversas fases de vitelogénesis, produciendo pocos oocitos de
enorme tamaño.
First report and basic histology of the terrestrial amphipod, Talitroides topitotum (Amphipoda: Talitridae), introduced to the mountain region of Heredia, Costa Rica. This study documents for the first time the introduction of the terrestrial amphipod, Talitroides topitotum (Talitridae) to mountain regions of San Rafael and Barva, Heredia, Costa Rica, with predominance of juveniles and adult females with and without eggs. The species comes from Asia and could have been introduced associated with exotic plants. Basic aspects of histology are described, including the cellular structure of the main organs: heart, intestine, hepatopancreas, ovary, nerve cord, gill and oostegite. Adult females present massive formations of spongy connective tissue surrounding the digestive system and ovaries; oocytes are observed in different stages of vitellogenesis, producing few large oocytes.
First report and basic histology of the terrestrial amphipod, Talitroides topitotum (Amphipoda: Talitridae), introduced to the mountain region of Heredia, Costa Rica. This study documents for the first time the introduction of the terrestrial amphipod, Talitroides topitotum (Talitridae) to mountain regions of San Rafael and Barva, Heredia, Costa Rica, with predominance of juveniles and adult females with and without eggs. The species comes from Asia and could have been introduced associated with exotic plants. Basic aspects of histology are described, including the cellular structure of the main organs: heart, intestine, hepatopancreas, ovary, nerve cord, gill and oostegite. Adult females present massive formations of spongy connective tissue surrounding the digestive system and ovaries; oocytes are observed in different stages of vitellogenesis, producing few large oocytes.
Descripción
Palabras clave
CRUSTACEA, AMPHIPODA, TALITRIDAE, TALITROIDES TOPITOTUM, HISTOLOGÍA