I've come to the conclusion that these are not lenticulata and they are not strigata. I believe they are an unidentified species from Venezuela/Orinoco region.
Here's a comparison shot from June '07 to Jan '08. In the first pic the male is in front. The second shows the female in front.
Here's a comparison shot from June '07 to Jan '08. In the first pic the male is in front. The second shows the female in front.

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