palpal organ

palpal organ

[′pal·pəl ‚ȯr·gən]
(invertebrate zoology)
An organ on the terminal joint of each pedipalp of a male spider which functions to convey sperm to the female genital orifice.
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References in periodicals archive ?
Male palpal organ with a narrow embolus projecting retrolaterally from tegulum, sigmoidly curved (Figures 4, 7), with two subparallel prolateral keels, PS and PI keel.
Functional aspects of the male palpal organ in Dolomedes tenebrosus, with notes on the mating behavior (Araneae, Pisauridae).
(Araneae: Theridiidae) and its exceptional copulatory behaviour: emasculation, male palpal organ as a mating plug and sexual cannibalism.
Male palpal organ with a narrow embolus projecting retrolaterally from tegulum, sigmoidly curved (Figures 9-10), with two close subparallel prolateral keels, PS and PI.
Glands in the male palpal organ and the origin of the mating plug in Amaurobius species (Araneae, Amaurobiidae).
Males also differ from all theraphosids by the palpal organ morphology, having prolateral keels that are more or less convergent (Perez-Miles et al.
But the palpal organ and epigynum are similar to the others.
arndsti (Schmidt & von Wirth 1991) in having lyra setae in chelicerae and maxillae, but differs in the shape of the palpal organ (Fig.
Taxon choice.--Agnarsson (2004) analyzed theridiid phylogeny at the generic level using a matrix of 61 terminals (8 outgroup genera, 31 theridiid genera) and 242 characters, of which 88 (36%) pertained to the palpal organ. Based on these results (Fig.
Palpal organ with large sinuous conductor, embolus spiraling counter-clockwise in left palp, distal part inside groove in conductor, theridiid tegular apophysis and median apophysis apparently absent.
Keywords: Wolf spider, sandy grasslands, palpal organ, phenology, habitat preference
Interestingly, the mature spermatozoa are not densely packed in the spermophore of the palpal organ (Fig.