[Flash: Canon Macro Ring Lite MR-14EX] One of more than 2200 species in 109 genera in Family Theridiidae
(Wikipedia). The most famous member of this family is Latrodectus mactans
, the Black Widow. Family Theridiidae
has been extant since the Cretaceous, the period from ~145 to 66 million years before present (YBP). This individual is about 8 mm in length. Note the distended spinneret on the abdomen. "Cob" comes from the Old English word "ātorcoppe" meaning "spider." Wiktionary says "From Middle English, from Old English ātorcoppe ('spider'), corresponding to atter ('poison, venom') + cop ('head'). The latter is still to be found in the English word cobweb." Made at Gambrills, Anne Arundel County, Maryland, on August 25, 2014.