. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. long 4th femora stridulating structure cryptic resting position Gasteracanthinae sclerotized ring around spinnerets PM in male palpus male coxal hook A in male palpus Aranei dae bul b twi sts sclerites face median reduced PME tapetum Abbreviations : A terminal a ipophysi s Pi^ paramediar 1 apophy SIS Pt posterior eyes PLE posterior lateral eves PME posterior median eyes nae, a group of Araneidae with special- ized characters. (The subfamily Argiopi- nae exhibits many primitive characters; Levi, 1983.) The inability to
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. long 4th femora stridulating structure cryptic resting position Gasteracanthinae sclerotized ring around spinnerets PM in male palpus male coxal hook A in male palpus Aranei dae bul b twi sts sclerites face median reduced PME tapetum Abbreviations : A terminal a ipophysi s Pi^ paramediar 1 apophy SIS Pt posterior eyes PLE posterior lateral eves PME posterior median eyes nae, a group of Araneidae with special- ized characters. (The subfamily Argiopi- nae exhibits many primitive characters; Levi, 1983.) The inability to attack-wrap must therefore be a secondary loss and not the primitive condition (Tables 1,2). Unsolved Problems. Foremost among the numerous unresolved questions is whether the males of species have been correctly matched to females. Does the male with a Chaetacis-like palpus (Fig. 790) actually belong to M. pungens? Are the specimens assigned to M. furva in fact southern specimens of M. digitata? Why are females of the M. agriliformis group (including M. fidelis and M. pupa) rela- tively uncommon compared to males? Are they misidentified? Is the widespread M. lucasi, with its variable spines, really a sin- gle species? To answer this question it would be helpful to have more males col- lected with females. Do some highly vari- able Micrathena species hybridize, as is suggested by specimens in collections? This applies especially to M. plana and M. triangularis, evansi and triangularispi- nosa, and to variable Chaetacis species. Gasteracanthinae O. Gasteracanthides O. , 1871: 217. Name given to a new family. Bonnet, 1957: 1974. Included in this subfamily are araneid genera, in which both males and females of the species have a sclerotized ring around the spinnerets. There may be five or six gasteracan- thine genera in America. Gasteracantha includes two species: G. tetracantha in Puerto Rico, and G. cancriformis from the southern United States to northe
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