Amblyomma triste (Koch, 1844) (Acari: Ixodidae): morphological description of the ovary and of vitellogenesis.
The present study presents the morphology, histology, and the dynamics of vitellogenesis in females of the tick Amblyomma triste. The ovary in this species is of the panoistic type, therefore it lacks nurse cells. It is composed of a layer of epithelial cells that outwardly form the wall of the ovary, but also originate the pedicel, the structure that attaches the oocytes to its external margin, as well the oocytes themselves. In Amblyomma triste, the oocytes develop in four synchronic stages, which differs from the process in other tick species. The classification of the stages of the oocytes was carried out based on the presence of four morphologic characteristics: cytoplasm appearance; site of the germ vesicle; presence, quantity, and constitution of the yolk granules and presence of chorium.
de Oliveira
Patrícia Rosa
PR
Departamento de Biologia, I.B., UNESP, Av. 24 A, no 1515, Cx. Postal 199, CEP 13506-900, Rio Claro, SP, Brazil.
Camargo Mathias
Maria Izabel
MI
Bechara
Gervásio Henrique
GH
D000818:Animals; D005260:Female; D006651:Histocytochemistry; D026863:Ixodidae / Q000033:anatomy & histology* / Q000502:physiology* / Q000648:ultrastructure; D008055:Lipids / Q000032:analysis; D008855:Microscopy, Electron, Scanning; D009865:Oocytes / Q000648:ultrastructure; D010053:Ovary / Q000033:anatomy & histology / Q000502:physiology / Q000648:ultrastructure; D011134:Polysaccharides / Q000032:analysis; D011506:Proteins / Q000032:analysis; D014818:Vitellogenesis / Q000502:physiology
D008055:Lipids; D011134:Polysaccharides; D011506:Proteins