Abstract
Two new species of Alpaida O.P.-Cambridge, 1889 are described based on male and female specimens from seven restinga areas from northeastern to southern Brazil. Alpaida teresinha sp. nov., from Rio de Janeiro and Espirito Santo, differs from other species of the genus in the wider lobe of the conductor, the concave median apophysis and with the posterior lobe ventrally positioned, and the wrinkled distal projection of the terminal apophysis in males. Females can be recognized by having widely spaced epigynal lips and by the narrow epigynal notch in ventral view. Alpaida toninho sp. nov., from Bahia, Espirito Santo, Rio de Janeiro and Santa Catarina, can be distinguished by the round lobes of the terminal apophysis, and by the median apophysis with a distal lobe and a projection in males, and by the epigynum elliptical, with a short scape in females.
Highlights
Alpaida O.P.-Cambridge, 1889 is composed of 140 species (PLATNICK 2012) of diurnal orb web spiders
Species of the genus are characterized by having orange to red carapace, carapace and abdomen without bristles, and females with the contours of the eyes darkened; the male palp has the paramedian apophysis mushroom-shaped and connected to the conductor and radix, and the embolus and terminal apophysis fused in a single structure; the sclerotized epigynum usually has a scape in the middle portion and posterior lips (LEVI 1988)
Most of the species of the genus were described by LEVI (1988), who increased the number of described species of Alpaida from 40 to 134
Summary
Alpaida O.P.-Cambridge, 1889 is composed of 140 species (PLATNICK 2012) of diurnal orb web spiders. Species of the genus are characterized by having orange to red carapace, carapace and abdomen without bristles, and females with the contours of the eyes darkened; the male palp has the paramedian apophysis mushroom-shaped and connected to the conductor and radix, and the embolus and terminal apophysis fused in a single structure; the sclerotized epigynum usually has a scape in the middle portion and posterior lips (LEVI 1988). Two new species of Alpaida are described based on specimens collected in an extensive study of restinga spider communities in several localities along the Brazilian coast
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