A revision of the New World eximius lineage of Anelosimus (Araneae, Theridiidae) and a phylogenetic analysis using worldwide exemplars Author Agnarsson, Ingi text Zoological Journal of the Linnean Society 2006 2006-04-30 146 4 453 593 https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2006.00213.x journal article 10.1111/j.1096-3642.2006.00213.x 0024-4082 5426885 THE RUPUNUNI GROUP – CLADE 28 The rupununi group contains only two species, the very similar A. rupununi and A. lorenzo , both social. The species have unusual genitalia in comparison with other Anelosimus (see e.g. Fig. 56F ). Synapomorphies supporting the group include: loss of epigynal ridges ( 4 -1), medially acute copulatory bursa margin ( 6 -1), copulatory ducts attaching posteriorly to spermathecae ( 7 -0), broad cymbial hood ( 24 -1), branched MA ( 47 -1) and folded embolus rim ( 66 -1, Fig. 56F ). The rupununi group is one of the three isolated clades containing American Anelosimus ; it was revised by Agnarsson (2005).