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I collected some Tipulidae (immature stage) from La Réunion Island. I found to morph, but I did not find informations to identify them.
Is anyone could help me ?

Thanks

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other specimen

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sp1 vs sp2

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The second specimen (with the large black spiracles) may be a Nephrotoma

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Thank you Tony but what makes you say that it may be Nephrotoma.
I work on a research program, and I have to make identification keys
for all the aquatic fauna of La Réunion island. Have you got some reference,
bibliography which describe immature stage of Tipulidae? I only know the Nilsson book.

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With the name you gave me I found the publication of B. Theowald :"Die Entwicklungsstadien der Tipuliden (Diptera,
Nematocera), insbesondere der west-palaearktischen Arten". It is in free pdf download at : http://biostor.org/reference/61057
It is a very complete paper on immature stage of Tipulidae.
Base on this paper, my first larva (with long setae) belong to the Tipula genera, and the other with the large spiracles belong to
the genera Nephrotoma.

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The relative sizes and arrangement of the dorsal posterior processes and the number of marks on the subspiracular plates match the drawing of Nephrotoma in Smith's "Introduction to the immature stages of British flies" (Fig.14) - this drawing was taken from one of Brindle's papers, but I'm not sure which one. It was a suggestion only - I'm no expert on tipulid larvae!

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Here is a recent study on some Tipulinae larvae in the Oriental region with a key to some groups. Link to this site and click "Click here for e-print" for a PDF file. Your first larva looks like an aquatic species and the second one looks more of a terrestrial species. For Nephrotoma species you will need to check the front end of the larva to look for identification character.

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Great!!

Thank you for your answers.