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yes, this is most likely a dipteran larvae. the latter two ventral photo's show the habitus and, in my opinion the posterior part. In the habitus photo the right side is the anterior part in which the head capsule is. it is best to either clear (with lactic acid or so) this anterior part and take a photo of this headcapsule somewhat flattened under a glass-slide OR dissect it by carefully remove the soft tissue in this first segment. Most likely you'll see at both lateral parts postior of the first segment some kind of lobed structures. These are the anterior spiracles and are of diagnostic value. Also the shape of the posterior spiracles (shown at the right photo, ventral) are diagnostic i.e. are there slits or pores and how many etc.
I have never seen this type and I can only guess..Muscid fly?

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I don't know what this is, but I have some experience rearing Diptera from Heliconia inflorescenses. This is very easy. Just keep the larvae in small containers together with the water and plant parts in which you found them (this is important, as many species feed on the micro-organisms living in the phytotelmata). After a while they will pupate and emerge, and then you will be able to see the adults associated with your larvae. Sooner or later, you will also rear some Syrphidae (Quichuana, Copestylum)!

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Thank you Atylotus. I have found larvae so "enigmatic" (in my previous post has photos of these other larvae).
Thanks for the suggestions. I will make the clarify and post the result here. Muscidae fly? I do not know well. Again, thank you.
See ya
:)

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Thank you Menno.

The larvae are in ethanol:|. At this moment I am identifying the families. But in a opportune time follow your suggestion for creating the larvae and adults obtain. I found Syrphidae larvae.

:)

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Using again :) help. What family?
Larva was collected in bracts of Heliconia (Brazil), with abundant occurrence.
At the moment this is the best photo I have.
lateral
Thanks!