Heteroplectron californicum

Mark Melton

Active Member
These larvae are usually found on the edges of pools or glides. They use a small waterlogged piece of wood, chew through it, line it with silk and plug it with a small piece of stone or wood on the posterior end. The earlier instars of these larvae use cases made of pieces of bark and redwood needles. Occasionally mature larvae will appropriate a case of Nerophilus californicus. These usually have some twigs attached to the front of the case. These larvae were collected in Mill Creek, which feeds into the Russian River.

Mature larvae with cases. Cases left to right; 29 mm, 26 mm and 20 mm. Larvae left to right; 21mm, 19 mm and 17mm.

Mature larva 21mm

Mature larva 21 mm

Mature larva 21 mm

Immature larva 8mm

Immature larvae and cases; cases 8-14 mm, larvae 6-8 mm

heteroplectron californicum.jpg
Nerophilus californicus cases used by Heteroplectron californicum larva. Heteroplectron larva in photo was using the case on it's left.
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