among the Symphyta lineages are still a source of active research . Basal superfamilies are shown in the cladogram below.

Anatomy

Hymenopterans range in size from very small to large insects. Their mouthparts are adapted for chewing, with well-developed mandibles (ectognathous mouthparts). Many species have further developed the mouthparts into a lengthy proboscis, with which they can drink liquids,

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