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Spermathecae are tubes or sacs in which sperm can be stored between the time of mating and the time an egg is fertilized. Paternity testing of insects has revealed that some, and probably many, female insects use the spermatheca and various ducts to control or bias sperm used in favor of some males over others. [1]: 880
An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous chondrichthyans. Living chondricthyans that produce egg cases include some sharks, skates and chimaeras. Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 ...
Oothecae are made up of structural proteins and tanning agents that cause the protein to harden around the eggs, providing protection and stability. [1] The production of ootheca convergently evolved across numerous insect species due to a selection for protection from parasites and other forms of predation, as the complex structure of the shell casing provides an evolutionary reproductive ...
Female egg sacs are also greyish-white, closely felted, and open towards the anal end. [ 3 ] Eriococcus orariensis female dorsal (upper) and ventral (lower) body surfaces are membranous and irregularly covered in small, inconspicuous, bristle-like structures called setae ; although the setae extend in semi-regular rows along the abdominal ...
Pulvinaria innumerabilis (cottony maple scale) is a small, flattened, brown scale insect about 1/8" long. In early summer mature females begin to secrete white, waxy, cottony-appearing egg sacs in which they lay as many as 1,500 eggs. Severely infested trees look like they are covered with strings of popcorn.
The invasive insects have been spotted in multiple counties across the state with recent populations discovered in Elkhart, Porter and St. Joseph counties last fall. Lanternfly eggs will hatch in ...
Females suspend their egg sacs in their webs; the spherical egg sacs have a tan papery outer layer. [3] Each egg sac contains from 150–200 eggs, with a single female producing 15–20 egg sacs in its lifetime. [citation needed] The spiderlings remain in the mother's web for several days after coming out of the egg sac. [5]
Because fossil insect eggs are so scarce, there weren’t many specimens available for comparison. So Lee consulted a global insect egg database, containing more than 6,700 living species, to ...
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