Alca (Aves, Alcidae) has a comparatively rich fossil record with respect to other Charadriiformes, consisting of thousands of specimens. Despite the abundance of fossil material, species richness in ...
Definable growth marks or rings in the femur of one of the young Nile crocodiles that were used in the study. Copyright, Maria Eugenia Pereyra. “Many vertebrates ...
There are 64 species of extant gliding mammals that are currently recognized, which are divided into six different families. These comprise eight species of gliding marsupials that live within ...
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