Spintharus berniesandersi
Spintharus berniesandersi is a species of Spintharus ("smiley-faced spiders") in the family Theridiidae. It is endemic to Cuba.

It was described in 2018 by  and Lily Sargeant of the University of Vermont in a revision of the genus by Agnarsson and colleagues. This revision is in contrast to Herbert Walter Levi's taxonomy, which considered it to be intraspecific variation within Spintharus flavidus.

Distribution
The specimens mentioned in the original species description all came from Cuba. The holotype was collected in Mensura-Piloto National Park, near Mayarí, Holguín Province. Additional specimens were collected from El Yunque Mountain, near Baracoa, Guantánamo Province and Gran Piedra, Santiago de Cuba Province.

Description
The female abdomen lacks humps and is nearly oval.

Measurements
The male's total length is 2.47–2.66 mm, with a cephalothorax length of 0.74–0.98 mm and femur I length of 1.23–1.90 mm. The female's total length is 2.89–2.40 mm, with a cephalothorax length of 0.91–0.80 mm and a femur I length of 1.75–1.44 mm.

Genetics
Part of the diagnosis of S. berniesandersi includes the combination of four specific mitochondrial DNA nucleotide substitutions.

Etymology
The specific name honors Vermont senator Bernie Sanders, whom the authors describe as "a tireless fighter for human rights and equality, and environmentally aware social democracy". Due to its name, this species received media attention.