Anelosimus analyticus (Chamberlin, 1924)

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 : 471

THE ANALYTICUS GROUP – CLADE 16

The analyticus group contains three species ( A. analyticus , A. chickeringi and A. pacificus ). The group is weakly supported by two convergent characters, sclerotized CD (9 -1, Fig. 1D ), and a cup-shaped conductor (36 -8, Fig. 2C ), both also present in the studiosus and jucundus groups. This clade is particularly sensitive to perturbations of data and often collapses, for example when related taxa are removed from the analysis. The position of A. pacificus is particularly weakly supported; preliminary molecular data suggest a very different placement of A. pacificus , as sister to the ethicus group (I. Agnarsson, L. Avilés & W.P. Maddison, unpubl. data).

Figures

Figure 1. The ‘analyticus group’. A–E, Anelosimus analyticus. A, male palp mesal; B, same, ventral view; C, epigynum; D, internal epigynum dorsal; E, male habitus. F–I, Anelosimus chickeringi. F, male palp mesal; G, same, ventral view; H, epigynum; I, internal epigynum dorsal; J, female abdomen. K–O, Anelosimus pacificus. K, male palp mesal; L, same ventral view; M, epigynum; N, internal epigynum dorsal; O, digital photograph of spermathecal area of cleared epigynum.

Figure 2. Anelosimus analyticus, male palp. A, dorsal; B, submesal; C, ventral, note the small embolic division b (Eb), and the cymbial hood (upper arrow). In this species the embolic lobe fits snugly under the subconductor (SC); D, ectal; E, apical view of tip, mesal side; F, part of palpal tibia, unusually with four trichobothria (arrows). Scale bars: A–D, 100 µm; E,F, 50 µm.