Brevipalpus yothersi, Baker, 1949

Sinico, Thaís Elise, Nunes, Maria Andréia, Kitajima, Elliot Watanabe, Cunha, Bruna Aparecida & Novelli, Valdenice Moreira, 2022, Notes on the embryological development of the Brevipalpus yothersi (Acari: Tenuipalpidae), Acarologia 62 (1), pp. 113-119 : 116

Brevipalpus yothersi egg morphology

Details of external eggs morphology could be followed under SEM. Transverse streaks in the outer layer of the eggs called carenas ( Rodrigues and Machado 1999) (Figure 2a) and a fold-like structure in the equatorial region of the egg (Figure 2b). An external globular structure were observed in studies by Rodrigues and Machado (1999). However, it was observed only in eggs with a more advanced development time but morphologically different from the one found in our study.

Eggshells frequently broke during fixation in Carnoy’s solution, allowing for observation of the internal structure of eggs. Additionally, channels similar to small perforations were seen extending between the shell and intermediate lamella ( Figure 3 ). These channels may be associated with the respiratory tract of the embryo. Such structures were also observed by Dittrich (1971) in studies with T. urticae , and they have been shown to give mites protection against desiccation and gas exchange.

Figures

Figure 3 Internal analysis of the B. yothersi eggs: small perforations with a possible association with