egg case

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egg case

[′eg ‚kās]
(invertebrate zoology)
A protective capsule containing the eggs of certain insects and mollusks. Also known as egg capsule.
A silk pouch in which certain spiders carry their eggs. Also known as egg sac.
(vertebrate zoology)
A soft, gelatinous (amphibians) or strong, horny (skates) envelope containing the egg of certain vertebrates.
References in periodicals archive ?
Afterward, all hatchlings from each ootheca were counted and weighed to the nearest mg using an electronic balance.
Although we did not record the proximity of any ootheca to any other when doing the searches in 2005, we did not see such obvious clustering of egg cases as Eisenberg and Hurd (1990) report; only in blackberry thickets were egg cases occasionally clumped in such proximity.
The number of eggs per ootheca decreased by almost threefold in ootheca from DFB-treated females, 26 [+ or -] 6 eggs per female, compared to controls, 80 [+ or -] 2 eggs per female (significant p = 0.
The foam home--called an ootheca (oo-THEE-kuh)--dries and hardens.
2) Ootheca rotation, two states: ootheca held dorsal (0), ootheca rotated 90 [degrees] (1).
Adult females were discarded after their ootheca hatched and second and third instars were held until use in a trial.
These were weighed to determine expected numbers of emerging nymphs from each ootheca according to a regression provided by Eisenberg and Hurd (1977).
While translocation of ootheca to northern sites may create new populations within the developing potential tolerance range, population movement S is more problematic.