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42
Indiana University Studies

Gall structures in Agamic Cynips

0 = absent, — = poorly developed, + = distinct, + + = well developed.
Subgenus Specific Stock Nutritive
layer
Protective
layer
Parenchyma
layer
Collenchyma
layer
Epidermal
layer
Cynips folii + + + + 0 +
longiventris + + + + + +
divisa + + + + + 0 +
agama + + + + 0 +
disticha + + + + + + +
cornifex + + + + + +
Antron echinus + + + + +
guadaloupensis + + + + + +
teres + + + + + +
Besbicus multipunctata + + + + +
maculosa + + + + +
mirabilis + + + + + +
Philonix plumbea + + + + +
fulvicollis + + + + +
Atrusca dugèsi + + + + + +
bella + + + + + +
cava + + + + + +
centricola + + + + + +
Acraspis arida + + + +
mellea + + +
conica + + + +
nubila 0 0 + + + +
villosa 0 0 + + + +
gemmula 0 0 + + + +
pezomachoides 0 0 + + + +
hirta 0 0 + + + +

Within each subgenus there is striking uniformity in the degree of development of each gall tissue. Thus, in the subgenus Cynips the protective layer is unusually thick and the collenchyma layer is absent or poorly developed (except in the unique C. cornifex). In Antron all five layers are well