Theridiosoma O. Pickard-Cambridge, 1879

Type species: Theridiosoma argenteolum O. Pickard-Cambridge, 1879

Diagnosis. Theridiosoma MAlES DIffEr frOM All OtHEr tHErIDIOSOMAtIDS by tHE fOrM Of tHE EMbOlIc DIvISION, A tUbUlAr EMbOlUS WItH tHE EMbOlIc ApOpHySIS frAgMENtED INtO SEvErAl lONg brIStlE-lIkE pArtS (FIg. 16) AND A cUrvED MEDIAN ApOpHySIS, WItH A SlIgHt grOOvE AlONg ItS UppEr AxIS (FIg. 15). FEMAlES Theridiosoma ArE DIAgNOSED by tHEIr fIrM AND rObUSt cOpUlAtOry DUctS lEADINg frOM tHE bUrSA tO tHE SpErMAtHEcAE (FIg. 29).

Composition in America. Theridiosoma ankas n. sp., T. argenteolunulatum SIMON, 1897, T. caaguara RODrIgUES & Ott, 2005, T. chiripa RODrIgUES & Ott, 2005, T. concolor KEySErlINg, 1884, T. davisi ArcHEr, 1953, T. esmeraldas n. sp., T. gemmosum (L. KOcH, 1877), T. goodnightorum ArcHEr, 1953, T. kullki n. sp., T. lucidum SIMON, 1897, T. nechodomae PEtrUNkEvItcH, 1930, T. obscurum (KEySErlINg, 1886), T. sacha n. sp., T. sancristobalensis BAErt, 2014, T. savannum CHAMbErlIN & IvIE, 1944, T. zygops (CHAMbErlIN & IvIE, 1936).

Distribution in America. CANADA, USA, MExIcO, COStA RIcA, PANAMA, JAMAIcA, PUErtO RIcO, WESt INDIES, VENEZUElA, EcUADOr AND tHE GAlApAgOS ISlANDS, BrAZIl.