Harvestman The Biology Of Opiliones Vs Spider
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Daddy longlegs, Shepherd spiders, Harvestmen, Grandfather greybeard. These are just. A few years ago. In 2007, Ricardo Pinto-da-Rocha, Glauco Machado and Gonzalo Giribet published 'Harvestmen: The Biology. And, like spiders, there is a lot of misinformation out there about Opiliones. The authors focus on both the unique attributes of harvestmen biology, as well as on biological studies conducted with harvestmen species that contribute to the understanding of behavior and evolutionary biology in general. By providing a broad taxonomic and ecological background for understanding this major. The harvestmen (Order Opiliones) are the third-most diverse group of arachnids after spiders and mites. More than 6000 species have been described, and it is estimated that there are 10,000.
The penis of the Opiliones (harvestmen) is an intromittent organ that is not present in other arachnids. It consists of a long shaft (the truncus) and a terminal capsule called a glans, containing a stylus and ejaculatory duct. It may have from one to three muscles, or none as in the specialized lineage Grassatores, where the penis is operated by haemolymph pressure. In some members of the Cyphophthalmi, the structure has been termed a 'spermatopositor'.[1]
This denomination refers to a superficial similarity (analogy) with vertebratepenises and does not have any phylogenetic relationship with it.
Cellar Spider Vs Harvestman
References[edit]
- ^Ricardo Pinto-da-Rocha, Glauco Machado, Gonzalo Giribet (eds). (2006). 'Morphology and Functional Anatomy'. Harvestmen: the Biology of Opiliones. Cambridge, MA: Harvard University Press. pp. 59–60. ISBN0674023439.CS1 maint: uses authors parameter (link)
Harvestman The Biology Of Opiliones Vs Spider Snake
External links[edit]
- Opiliones reproductive anatomy- Dr. Jefferey Schultz, University of Maryland
- Harvestman Spider penis, Thelbunus mirabilus - Australian Museum