Resumen de Arreglo de los polígonos del exocorion de huevos eclosionados de algunas especies de los géneros Triatoma Laporte, Meccus Stal y Nesotriatoma Usinger (Heteroptera: Reduviidae)
Gleyni González, Elis Aldana, Eliézer Lizano, Glauco A. López Díaz
- español
En este trabajo se estudiaron estructural y cuantitativamente las celdas exocoriales de huevos eclosionados de Triatoma infestans (Klug), Triatoma lenti Sherlock & Serafim, Triatoma maculata (Erichson), Triatoma sordida (Stal), Meccus picturatus (Usinger), Meccus longipennis (Usinger), Meccus pallidipennis (Stal) y Nesotriatoma flavida (Neiva). Los huevos se analizaron por regiones: caudal, media y cefalica. Se encontro que el hexagono fue el poligono mas abundante en todas las regiones del huevo y en todas las especies, seguido del pentagono y del heptagono; se encontraron diferencias estadisticamente significativas en el numero tanto de hexagonos y pentagonos entre regiones de una misma especie y entre la misma region de las diferentes especies, sin embargo, el numero promedio de heptagonos no vario al comparar la region media entre las diferentes especies y al comparar las diferentes regiones en una misma especie. No se encontraron diferencias estadisticamente significativas en el promedio de poligonos, segmentos totales, heptagonos, hexagonos y pentagonos, al comparar las especies examinadas del genero Meccus. Se propone un protocolo de identificacion y analisis de teselaciones, con el cual se encontro que en 108 campos examinados de 385.000 �Êm2 cada uno, se identificaron teselaciones compartidas en los 108 campos observados con determinadas combinaciones de heptagonos, hexagonos y pentagonos, y se observaron teselaciones no compartidas en la totalidad de los campos, con combinaciones de poligonos de cuatro a nueve lados, y cada teselacion se represento por un grafo. Se discuten las implicaciones taxonomicas, funcionales, filogeneticas y construccionales de los arreglos poligonales descritos.
- English
In this study a structural and quantitative analysis of the exochorial polygonal cells of hatched eggs of Triatoma infestans (Klug), Triatoma lenti Sherlock & Serafim, Triatoma maculata (Erichson), Triatoma sordida (Stal), Meccus picturatus (Usinger), Meccus longipennis (Usinger), Meccus pallidipennis (Stal) and Nesotriatoma flavida (Neiva) was performed; cephalic, median and caudal egg regions were compared. It was found that cells with hexagonal shape were more abundant among all egg regions and studied species, followed by pentagonal and heptagonal polygons respectively. The average number of hexagonal and pentagonal polygons was significantly different among the three egg regions for each species, and when comparing the median, cephalic and caudal egg regions among different species. However, the average number of heptagons did not differ among the three egg regions for each species. The average number of heptagons did not differ when comparing the median egg region, but differed when comparing the cephalic and caudal egg regions, among different species. The average number of hexagons, pentagons, heptagons, total polygons, and total segments did not differ among the different species eggs of Meccus genus. A group of 108 micrographies (380,000 ìm2 each one) were studied using tessellation methods. Shared tilings and unshared tilings were found in all the micrographies observed. Shared tilings were conformed by combinations of heptagons, hexagons and pentagons, and unshared tilings by combinations of polygons from four to nine sides. Finally, each tiling arrangement was represented as a graph. Taxonomic, functional and phylogenetic implications of the polygonal cell arrangement described here are discussed.
