Anelosimus rupununi, Levi, 1956

Agnarsson, Ingi, 2006, A revision of the New World eximius lineage of Anelosimus (Araneae, Theridiidae) and a phylogenetic analysis using worldwide exemplars, Zoological Journal of the Linnean Society 146 (4), pp. 453-593 : 470

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).

Figures

Figure 56. Characters II, conductor types (arrows). A, Anelosimus sp. 5 (South Africa), with simple round conductor; B, Kochiura rosea, with an elongated fan-shaped conductor; C, Enoplognatha ovata, with a complex, spiralling, and distally sclerotized conductor; D, Achaearanea tepidariorum, with a large, distinctly grooved conductor; E, Theridion varians, with a complex distally membraneous conductor; F, Anelosimus rupununi, with a small, membraneous, ball-like, conductor; G, Anelosimus biglebowski, with a simple, subtriangular, conductor; H, Anelosimus octavius, with a ‘cup-shaped’ conductor, a synapomorphy of the sclerotized copulatory duct clade and the analyticus group.