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２－３－１　　Ｓtictochironomus group 　　
　antenna with 6 segments

Stictochironomus 　　Microtendipes 　　Paratendipes . *


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Stictochironomus

Large sized larvae about 10mm, orange ～ red in color.　The larvae of this genus inhabit in the comparatively cool　and clear water. There are about 10 species in Japan.

4 medina teeth, inner two (central teeth) smaller than outer. Lateral teeth 6 pairs,
1st lateral tooth smaller than 2nd... Ventromental plate broad , radial line thin.
Lateral teeth (inner teeth) of mandible 3, seta subdentalis long, slightly curved.　Antenna 6 segments, Lauterborn's organ alternate on segment 2nd. and 3rd..
SⅠand SⅡplumose on both sides.　Pecten epipharyngis consisting of 3～6 separate.
 Some of Stictochironomus have blackish brown area on ventral side of head,(fig.2)

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　

Diference with Microtendipes　and 　Paratendipes 　

　 mentum SⅠ SⅡ pecten epipharyngis
Microtendipes rydalensia type 3 median teeth the same sizes, pale yellow weakly plumose on both sides long plumose ３～several teeth
Microtendipes pedellus type central 1 of 3 median teeth very small.
pale yellow 		coarsely plumose on both sides long thickly simple simple,3 broad teeth
of the same length
Paratendipes 4 median teeth the same sizes, pale yellow weakly plumose on both sides long plumose simple,3 broad teeth
of the same length

Microtendipes

Microtendipes is a comparatively large sized larva of 6～8mm length. body color is dark red, head is fawn. 2 pairs of eye spots are slightly away.

There are two types in median teeth of mentum, one is 3 teeth iof the same size,and the other is the middle of three extremely small. Lateral teeth 6 pairs. Ventromental plates broad, edge of them weakly serrated.

 　　ＳⅠcoarsely or weakly plumose on both sides.
　　Pecten epipharyngis simple 3 broad teeth of equal 　　 length (rydalensia type) or 3～several teeth (pedellus type).

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　


Paratendipes

Paratendipes is a comparatively large sized larva of 7～10mm length. body color is dark red, head is light brown. 2 pairs of eye spots away distantly.
Several species inhabit in Japan.

4 median teeth pale yellow., 2 central teeth slightly small. Lateral teeth 6 pairs, brown, 1st. lateral tooth fused with 2nd. very small;, 2nd. lateral tooth largest.
Ventromental plates medially separated by 1/2 breath of mentum.		 Antenna with ６ segments, antenna ratio almost 1.2～1.4.
, Lauterborn organ aiternate on segment 2nd. and 3rd..
・SⅠplumose nomally, S Ⅱplimose moderately long.
・Labral lamell normal.
・Pecten epipharyngis consisting of 3 simple,triangle.
・Sata subdentalis long, sharp.
・Anal setae 8.

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