Browsing by Author "7a241be0-52ab-41ac-a0cd-99be24a59db2"
Now showing items 1-13 of 13
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Cues guiding uloborid construction behavior support orb web monophyly
Eberhard Chabtree, William G.; Barrantes Montero, Gilbert (2015)Behavior can provide useful traits for testing phylogenetic hypotheses, and some details of orb web construction behavior have been especially useful in characterizing higher-level groups in spiders. The cues used to guide ... -
Egg sac construction by folding dead leaves in Pozonia nigroventris and Micrathena sp. (Araneae: Araneidae)
Moya Ramírez, Jairo; Quesada Hidalgo, Rosannette; Barrantes Montero, Gilbert; Eberhard Chabtree, William G.; Escalante Meza, Ignacio; Esquivel Dobles, Carolina; Rojas, Andrés; Triana Cambronero, Emilia; Arias, Adriana (2010)Published descriptions of egg sac construction behavior in araneids are scarce. We describe egg sac construction and oviposition in one individual of the poorly known araneid Pozonia nigroventris (Bryant 1936) and two ... -
The evolution of prey‐wrapping behaviour in spiders
Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2007)We traced the evolution of silk use by spiders in attacks on prey by combining previous publications with new observations of 31 species in 16 families. Two new prey‐wrapping techniques are described. One, in which the ... -
Extreme Behavioral Adjustments by an Orb‐Web Spider to Restricted Spaces
Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2012)Adaptive flexibility in response to environmental variation is often advantageous and occurs in many types of traits in many species. Although the basic designs of the orb webs of a given species are relatively uniform, ... -
Feeding by Philoponella vicina (Araneae, Uloboridae) and how uloborid spiders lost their venom glands
Weng, Ju Lin; Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2006)Feeding by uloborid spiders is unusual in several respects: cheliceral venom glands are absent; prey wrapping is extensive (up to several hundred metres of silk line) and severely compresses the prey; the spider’s mouthparts ... -
Functional aspects of genital differences in Leucauge argyra and L. mariana (Araneae: Tetragnathidae)
Barrantes Montero, Gilbert; Aisenberg Olivera, Anita; Eberhard Chabtree, William G. (2013)Morphological studies have documented the tendency for male genitalia to diverge rapidly compared to other body parts in many animal groups, including spiders. But documentation of how differences in genital structures of ... -
Hairy kisses: tactile cheliceral courtship affects female mating decisions in Leucauge mariana (Araneae, Tetragnathidae)
Aisenberg Olivera, Anita; Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2015)Sexual selection is thought to be an important force driving the evolution of sexually dimorphic morphology and behavior, but direct experimental tests of the functions of species-specific details of morphology are rare ... -
Loss of cheliceral clasping in Leucauge sp. (Araneae, Tetragnathidae)
Barrantes Montero, Gilbert; Sánchez Quirós, Catalina; Aisenberg Olivera, Anita; Leitch, Katherine; Eberhard Chabtree, William G. (2015)In male spiders, genitalia, sexual behaviour and secondary sex morphology tend to diverge rapidly across species, presumably as a result of sexual selection. In the three Leucauge species for which pre- and copulatory ... -
The mystery of how spiders extract food without masticating prey
Eberhard Chabtree, William G.; Barrantes Montero, Gilbert (2006)Standard accounts of how spiders obtain food without masticating their prey are probably largely wrong. Species in the families Uloboridae, Thomisidae, Araneidae and Theridiidae do not inject digestive fluid into the prey’s ... -
Ontogeny repeats phylogeny in Steatoda and Latrodectus spiders
Barrantes Montero, Gilbert; Eberhard Chabtree, William G. (2010)Web designs of young spiders are often less derived than those of older conspecific individuals. This study tested whether this ‘‘ontogeny repeats phylogeny’’ pattern occurs in two species of Latrodectus and two species ... -
Seasonal patterns of parasitism of the tropical spiders Theridion evexum (Araneae, Theridiidae) and Allocyclosa bifurca (Araneae, Araneidae) by the wasps Zatypota petronae and Polysphincta gutfreundi (Hymenoptera, Ichneumonidae)
Barrantes Montero, Gilbert; Eberhard Chabtree, William G.; Weng, Ju Lin (2008)Las tasas de parasitismo de Theridion evexum por la avispa parasitoide Zatypota petronae y de Allocyclosa bifurca por Polysphincta gutfreundi fueron estudiadas durante dos años. El parasitismo en T. evexum fue muy bajo ... -
Tie them up tight: wrapping by Philoponella vicinaspiders breaks, compresses and sometimes kills their prey
Eberhard Chabtree, William G.; Barrantes Montero, Gilbert; Weng, Ju Lin (2006)We show that uloborid spiders, which lack the poison glands typical of nearly all other spiders, employ thousands of wrapping movements with their hind legs and up to hundreds of meters of silk line to make a shroud that ... -
Vestiges of an orb-weaving ancestor? The “biogenetic law” and ontogenetic changes in the webs and building behavior of the black widow spider Latrodectus geometricus (Araneae Theridiidae)
Eberhard Chabtree, William G.; Barrantes Montero, Gilbert; Madrigal Brenes, Ruth (2008)Young juveniles of L. geometricus fit the strong trend for “ontogeny to repeat phylogeny” previously documented in other web-building spiders; younger spiders were less likely to build the derived silk retreats that occur ...