Arrow-shaped micrathena orb weaver

This spider is found in the eastern United States and throughout Central America. It has a distinctive arrow-shaped, largely yellow abdomen with black depressions above and variable red and black patterning below). Males are up to 5 mm (0.20 in) in length (excluding legs), but females are much larger at around 9 mm (0.35 in). The males lack spines.