This piece has many things going against it - but before I address those items, here is what it has for it: This is a tree hopper under the family Membracidae - very hard to find (Homoptera). These are the ones with strange head ornaments - really cool though. These are just rarely seen. Now the bad: kind'a rough piece, the animal is small and hard to see. The piece is sticky like copal (it is not copal). The price is great.
While some wasps are tough to ID, so are not, this is an ensign wasp, Hymenoptera, Evaniidae - the constriction at the abdomen is a dead giveaway. The larvae of the ensign wasp are parasitic in egg capsules of roaches. The adults are likely to appear in places where cockroaches appear.
Bristletails are rarely found in Dominican amber. The order Thysanura, is characterized by three long tails and long slender antennae. The body is shrimp-like. Thysanura, in particular, may be the direct ancestor of winged insects. There are also 3 or 4 fungus gnats, Diptera, Mycetophilidae. This is a good piece.
Interesting piece. This has a large long legged fly, Diptera, Dolichopodidae (?), an unknown beetle (not sure about this one), two fungus gnats, Diptera, Mycetophilidae and a moth fly. It has some other stuff also. A lot of the animals were caught at the 'interface' of two layers of resin - easily seen in the photo.
Lots of air bubbles, sometimes clouding the visibility. But among the air bubbles are a number of moving air bubbles. That water has been in the amber of 20 million years - just think about that - especially if there is an ancient virus that could wipe out life on earth. (Probably not, but an interesting thought.....) The piece is nice sized and has a barklice, Psocoptera. Also a worker ant and part of a leaf.
This piece that has something great inside it. There is a planthopper , Homoptera, Fulgoridea, with the wings spread - you can even see patterns on the wings that are 20 million years old. It is not too uncommon to see wings, but they are always folded together. It is VERY seldom that you actually see all 4 wings spread, such as in this one.
Almost rectangular in shape, the amber is clear. Inside this tomb is a young cock roach, Orthoptera, Blattidae. Also not far away is a barklice, Psocoptera, possibly in the family Psocidae. There is some surface glazing that slightly distracts from the specimen (which photographs VERY well as you will see in the images.)
Not sure which family these two flies are in, but when you see them, you will fall in love with them. The details are great and on the dorsal surface of one is what looks like a mass of mycelium. It is really a great sight to see this. I would describe it as rare and seldom seen. the amber is smallish and rectangular.
If you recognize the wings, then you know that this is a mayfly Emphemeridae. This is a male since the cerci are so long. This specimen with all three cerci intact is very rare. Mayflies are characterized by protruding eyes. Hind wings are small and rounded or very reduced. Mayfly adults enjoy a life span of no more than two days. On the transition from nymph to adult stage, they fly from the surface of the water for mating, but do not feed. They complete their mating process and die after one or two days. This specimen is perfect.
Another good sized piece of amber with a nice spider at the bottom. The shape is good, rather like a thick triangle. There are a number of small en-hydros (bubbles within bubbles) - containing water that is 24 million years old. There is also a fly near the amber. "Waiter, waiter, there is a fly in my amber...."