Major Groups | Insecta (insects) | Trichoptera (caddisflies) | Leptoceridae |
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2(1). Mandibles (Man) and maxillae (Max) elongate (usually prominent but can be folded in tightly); mandibles very flat, usually with 2 large teeth (T); metanotum (Met) without sclerites, other than those at the base of the legs; head ventrally usually very much shorter than dorsally so that ventral apotome (VA) is very short, despite being length of head; front of labrum (L) usually asymmetric; case variable
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-IF mandibles (Man) prominent THEN not flat; metanotum (Met) with or without sclerites, in addition to those at the base of legs; head capsule ventrally usually longer so that ventral apotome (VA) is longer; front of labrum (L) usually symmetric
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