P|R|R@@Tanypodinae@@n @@@
return to Tanypodinae return to Pentaneura group
As for the following chironomids, a genus to belong to is not clear.
s @f|sa@Cs @f|sbC@s @f|sw@@,@Tanypodinae G-TA
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@@Genus TB
Body length X`PO. It lives in the sandy mud bottom , Kusiro river (Hokkaido).
I caught a larva of this at the shore of Lake Shikotu ,too.
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PFAntenna with 4 segments., 0.4 times of head.length.B QFPecten hypopharyngis 30 or more teeth. they are small as an out side. @@Paraligula is divided into 4 in a vase , and each diviided into 2`3 more. RFmandible SFBasal segment of maxilla 1 .ring organ 2/3 from bottom. @@ring @organ TFHeight of procercus 5 times of diameter. anal setae 7. UFM-appendage VFClaws of anterior parapod WF2 setae forwards and 4 setae backwards on both sides of 2nd `9th body segments. Without fringe of swim-seta. XFAnal tubules POFClaws of posterior parapod @ |
Ligula with 8 teeth, outer 2 teeth large, middle 6 teeth equal size. They arranged by a low convex. As for the width of ligula , the whole is about the same . | @ | @ |
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apical tooth large, 2 accessory teeth small, basal tooth conciderably large. | antenna with 4 segments, 0.4 times of head length. antennal ratio 2.5. |
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small size larva : body length 13`1.5mm. living body color milky
white. Head light yellow. Eye spot 1 pair. It was caught at the source
of the Takahasi river.
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Ligula with 4 teeth. inner 2 teeth curved outwards. Pectenhypopharyngis with 20 or more teeth, 3 teeth at the coner large. |
Mandible : wide triangle, slightly curved. Inner teeth and basal tooth very small. seta subdentalis needle shape.. |
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PFAntenna ; 4 segments, half of the head lengthD Accessory blade very long and the tip swells out. QFLigula RFMandible SFMaxilla ; |seta 3 segments TFM-appendage: granulation consisting of 7`8 parallel rows. UFAnal tubules and Posterior parapod VFProcercus: Length 3 times of the diameter. .Anal aetae 6. WFClaws of posterior parapod |
Tanypodinae G-TD
Just editing !
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This larva was caught in Naruse river( Branch of Omono river)
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Ligul with 5 teeth,. Row of teeth slightly concave. Point of inner tooth straight. Paraligula bifid. Pecten hypopharyngis with 13`14 teeth. |
Apical tooth almost curved in right angle . 2 large inner teeth and considerably large basal tooth. Lump-shaped projection at the base of apical tooth , outside of mandible uneven. |
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PFAntenna :4 segments, half of head length, antennal
ratio 2.5 QFExpansion of the bit of antenna RFLigula SFM-appendage , drosomentum. Grsanulation consisting 8 paralell rows. TFmandible UFMaxilla: palp of basal segment 1, b-seta 2 segments VFClaws of anterior parapod WFClaws of posterior parapod XFProcercus; length 3 times of the diameter, anal setae 7. POFanal tubules long oval. |
This larva caught in Biwa lake.
Body length 11`12 mm.. without fringe of swim-seta
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PFAntenna 5 segments, antenal ratio 2.4 QFLigula 5 teeth almost equal size. Whole the ligula about the same width. Paraligula divided into 4 in the base and each divided@into 3`6. Pectenhypopharyngis with 30` 32 teeth. RFMandible: both accessory teeth and basal tooth small. SFDrosomentum tooth absent. TFpalp of maxilla 1 segment UFClaws of posterior parapod VFLength of procercus 4.5 times of the diameter. nner side of procercus dark brown. Anal setae 7. @@ |
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