Browsing Biología by Author "966290cc-e212-4578-80f6-abcef51c8334"
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Carrion Feeding By Spiderlings Of The Cob-Web Spider Theridion evexum(Araneae, Theridiidae)
Barrantes Montero, Gilbert; Weng, Ju Lin (2007)The use of carrion to feed spiderlings has never previously been observed in spiders. Here we show that the theridiid Theridion evexum Keyserling 1884 stored dead insectan prey for up to one week prior to the emergence of ... -
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 ... -
Maternal care and offspring behaviour in three theridiid species (Araneae, Theridiidae)
Barrantes Montero, Gilbert; Weng, Ju Lin (2009)Maternal care is widespread in theridiids. Theridion evexum Keyserling breaks the threads in the outer layer of the egg sac to allow its spiderlings to leave the sac. Achae-aranea tesselata (Keyserling) and Anelosimus ... -
Natural History and Larval Behavior of the parasitoid Zatypota petronae (Hymenoptera: Ichneumonidae)
Weng, Ju Lin; Barrantes Montero, Gilbert (2007)The koinobiont ectoparasitoid Zatypota petronae Gauld (Ichneumonidae) parasitizes medium-sized immatures of the cobweb spider Theridion evexum Keyserling (Theridiidae). Zatypota petronae apparently attacks the spider inside ... -
Natural history, courtship, feeding behaviour and parasites of Theridion evexum (Araneae: Theridiidae)
Barrantes Montero, Gilbert; Weng, Ju Lin (2007)Theridion evexum constructs webs in the understory of wet middle-elevation forests in Costa Rica. The spiders construct retreats by curling a leaf and produce a mesh in front of the opening. Long, more or less vertical ... -
The prey attack behavior of achaearanea tesselata (araneae, theridiidae)
Barrantes Montero, Gilbert; Weng, Ju Lin (2006)The attack behavior of the cobweb spider Achaearanea tesselata (Keyserling 1884) is roughly separated into three sequential steps: descend from the suspended retreat, pass through the sheet threads, and wrap the prey from ... -
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 ... -
Viscid globules in webs of the spider achaearanea tesselata (araneae: theridiidae)
Barrantes Montero, Gilbert; Weng, Ju Lin (2006)We describe the presence and dimensions of viscid globules in both the sheet and tangle portions of the webs of Achaearanea tesselata (Keyserling 1884). We found viscid globules in all sheets and tangles of the webs examined. ...