Regmaglypts are shallow, thumbprint-like impressions on the surface of larger meteorites that are formed by preferential local ablation of material from the surface as a meteor passes through the Earth’s atmosphere. They are probably formed by vortices of hot gas. Any meteorite with regmaglypts will have a fusion crust. Many meteorites with fusion crusts do not have regmaglypts, however.
Here are photographs of a few examples. (I collect meteorite photos and do not remember where I obtained some of these photos.)
All the photos below were sent to me buy people who thought the rocks had regmaglypts. None of these rocks are meteorites – none has a fusion crust. Most of these features are the result of sculpting by wind or water on Earth. Some of the depressions are incipient vesicles.