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Summary
Mentum from a larval Acricotopus longipalpus-type from the insect family Chironomidae and subfamily Orthocladiinae. This material is from China (tibetian plateau). The mentum is very worn and has a beard. Related pictures:
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Mentum from the same chinese Orthocladiinae like [Common:Image:L_Orthocladiinae_head_explained.jpg Image:L Orthocladiinae head explained.jpg]. It is beared: any suggestions? --~~~~