Developmental biology among corbiculate bees : Bombus impatiens, Including observations on its egg eclosion /

Abstract

This contribution results from an investigation of four commercially obtained colonies of Bombus (Pyrobombus) impatiens Cresson in an attempt to understand the functional anatomy and behavior of its immature stages. Eggs are described in detail, and their chorionic microstructure is contrasted with that of Bombus (Cullumanobombus) griseocollis (De Geer). They are deposited in groups consisting of a few to more than nine eggs into a single chamber. The study confirms that larvae pass through four instars. Although increasing in size dramatically from one instar to the next, larval anatomy and behavior change little during the first three instars. The last instar is the one that commences defecation and production of silk resulting in cocoon construction. In contrast to most bees, its larval activities result in substantial changes in size and shape of its brood chamber, whereas brood chambers of most bees are constructed by the female and modified little by the offspring. This study is a part of a series of investigations into the similarities and differences in the developmental biologies among corbiculate bees.

Egg and Mature Larva of a Species of Plebeia with a Preliminary Overview of the Mature Larvae of the Meliponini Relative to Those of Other Corbiculate Taxa (Apoidea: Apidae)

“…This is evidenced by the number of recent papers by the first author and coauthors exploring the nesting biology and immature stages of corbiculate Apidae, cited here arranged by tribe. Euglossini: Rozen, 2016Rozen, ,2018Bombini: Rozen et al, 2018a, 2018bMeliponini: Rozen et al, 2019;Apini: Rozen et al, 2017. Whereas the first part of this paper reports on the eggs and mature larvae of Plebeia "nanl," the second part provides a preliminary assessment of our current understanding of mature meliponine larvae relative to those of other corbiculate bees.…”