The spider genus Spintharus occurs from the northeastern USA to Brazil

Brazil

Brazil , officially the Federative Republic of Brazil , is the largest country in South America. It is the world's fifth largest country, both by geographical area and by population with over 192 million people...

, with one species found in Pakistan

Pakistan

Pakistan , officially the Islamic Republic of Pakistan is a sovereign state in South Asia. It has a coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by Afghanistan and Iran in the west, India in the east and China in the far northeast. In the north, Tajikistan...

.

It is very similar to the genus Thwaitesia

Thwaitesia

Thwaitesia is a genus of spider that occurs worldwide in the tropics.It is very similar to the genus Spintharus, and both are similar to Episinus....

, and both are similar to Episinus

Episinus

Episinus is a spider genus of the family Theridiidae.These spiders reach about 5mm in size. They occur almost worldwide.-Species:* Episinus affinis Bösenberg & Strand, 1906...

. Unlike Argyrodes

Argyrodes

Spiders of the genus Argyrodes , also called dewdrop spiders, occur worldwide. They are best known as kleptoparasites: they steal other spiders' prey. They invade and reside in their host's web even though they can spin their own webs...

, they have two setae in place of a colulus.

Specimens of S. flavidus are variable in structure. Only some have an elevated eye region or humps on the anterior of the abdomen.

Females of F. gracilis are 3.7mm long, males 2.3mm.

Species

• Spintharus argenteus Dyal, 1935 (Pakistan)
• Spintharus flavidus Hentz, 1850 (USA to Bolivia, Brazil)
• Spintharus gracilis Keyserling, 1886 (Brazil)