Paraxial organ of a scorpion: structural and ultrastructural studies of Euscorpius tergestinus paraxial organ (Scorpiones, Euscorpiidae)

@article{Lauti2008ParaxialOO,
  title={Paraxial organ of a scorpion: structural and ultrastructural studies of Euscorpius tergestinus paraxial organ (Scorpiones, Euscorpiidae)},
  author={Nicol{\'e} Lauti{\'e} and Lydia Soranzo and Marie-Claire Lajarille and Roland Stockmann},
  journal={Invertebrate Reproduction \& Development},
  year={2008},
  volume={51},
  pages={77 - 90}
}
Summary By combining ultrastructural and histochemical approaches, the paraxial organs of Euscorpius tergestinus (syn. E. carpathicus; Scorpiones, Euscorpiidae) have been studied for the first time. The paraxial organs are symmetrical structures in the male genital system. They are located on each side of the mesosoma and end at the genital aperture. The paraxial organs have a glandular function. They are directly involved in the secretion of the two hemispermatophores, which are deposited in… 
The ultrastructure of book lung development in the bark scorpion Centruroides gracilis (Scorpiones: Buthidae)
  • R. Farley
  • Biology, Medicine
    Frontiers in Zoology
  • 2011
TLDR
There are differences and similarities in the formation of book lung and book gill lamellae and the homology hypothesis for these respiratory organs is supported or not supported depending on which developmental features are emphasized.
Ultrastructure of book gill development in embryos and first instars of the horseshoe crab Limulus polyphemus L. (Chelicerata, Xiphosura)
  • R. Farley
  • Medicine, Biology
    Frontiers in Zoology
  • 2012
TLDR
The developmental observations herein and in an earlier study of scorpion book lungs show that the lamellae in book gills and book lungs result from some similar activities and features of the precursor epithelial cells: proliferation, migration, alignment and apical/basal polarity with secretion of cuticle from the apical surface and the basal surface in contact with hemolymph.
Evolutionary morphology of the hemolymph vascular system in scorpions: a character analysis.
TLDR
A more detailed description of the hemolymph vascular system (HVS) in scorpions is presented, based on comparison of the vascular structures of the heart and the branching pattern of the prosomal arteries among 45 exemplar species representing most of the major scorpion lineages.
Book gill development in embryos and first and second instars of the horseshoe crab Limulus polyphemus L. (Chelicerata, Xiphosura).
  • R. Farley
  • Biology, Medicine
    Arthropod structure & development
  • 2010
TLDR
Reports of differences in embryology refine but do not preclude hypotheses about book gill/book lung homology since addition, deletion or modification of ancestral features often occur for the benefit of the embryos and larvae.
Testes Mass, but Not Sperm Length, Increases with Higher Levels of Polyandry in an Ancient Sex Model
TLDR
As predicted by the sperm competition theory and according to what happens in other arthropods, testes mass increased in species with higher levels of sperm competition, and influenced positively spermatophore volume, but data was not conclusive for sperm length.
Successive matings produce opposite patterns on ejaculate volume and spermatozoa number in an ancient arthropod model with indirect sperm transfer
The production of spermatophore and ejaculate is energetically expensive for males. High mating rates may accelerate sperm depletion and progressively decrease the size of the ejaculates. Sperm

References

SHOWING 1-10 OF 58 REFERENCES
A study of a scorpion cuticle: I. The structure and staining reactions of the fully formed cuticle of Buthus quinquestriatus (H. & E.)
TLDR
It is suggested that in spite of certain points of similarity with the cuticle of insects, the scorpion cuticle resembles that of spiders more closely than has been hitherto recognized.
The Male Genital System of the Scorpions, Buthus quinquestriatus
TLDR
New methods have been adopted to resolve the structure of the ejaculatory organ and its supporting shaft of the scorpion, and several basal processes have been found, namely, the oblique vertical, longitudinal, superior, and inferior outer and inner processes.
Morphology and function of male genitalia (spermatophores) in Euscorpius italicus (Euscorpiidae, Scorpiones): Complex spermatophore structures enable safe sperm transfer
TLDR
It is concluded that “safeguarding of sperm transfer” is one driving force for evolution of male genital complexity in scorpions, but also sexual selection by cryptic female choice could partly play a role.
An Examination of the Cuticles of two Scorpions, Pandinus imperator and Scorpiops hardwickii
TLDR
The statement by Krishnan that chitin is present in the epicuticle is critically examined and a possible explanation of the differences which have been reported between the cuticles of different scorpions is offered.
Studies of male sexual tubes in hermit crabs (crustacea, decapoda, anomura, paguroidea). I. Morphology of the sexual tube in Micropagurus acantholepis (Stimpson, 1858), with comments on function and evolution
TLDR
This is the first in‐depth study of a sexual tube in the Paguroidea, a group where a remarkable number of genera with species having these intriguing sexual structures are known.
Cytodifferentiation in the accessory glands of Tenebrio molitor. VIII. Crossed immunoelectrophoretic analysis of terminal differentiation in the postecdysial tubular accessory glands.
TLDR
Based on crossed immunoelectrophoresis, it is evident that at least two of these tubular accessory gland antigens appear to contribute to the spermatophore.
SPERMATOPHORES OF SOME NORTH AMERICAN SCORPION S (ARACHNIDA, SCORPIONES )
TLDR
It is postulated that the Chaerilidae are more closely related to scorpions with lamellifor m sperMatophores than they are to buthids, and their spermatophores are probably of a lamellIfor m "type" .
The jumping mechanism of Xenopsylla cheopis. I. Exoskeletal structures and musculature.
  • M. Rothschild, J. Schlein
  • Biology, Medicine
    Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 1975
The jumping apparatus of the flea, which includes highly modified direct and indirect flight muscles, is described: attention is drawn to the various specializations of the exoskeleton which stiffen
Fine structure of the epicuticle of the desert scorpion, Hadrurus arizonensis, with reference to location of lipids.
TLDR
The surface and transverse sections of the epicuticle of the desert scorpion were examined by scanning and transmission electron microscopy, respectively and lipid solvents did not significantly alter the morphology of any of these layers or the contents of the wax canals that penetrate the cuticulin layer.
Fine structural organization of the spermatheca in the cockroach, Periplaneta americana.
The detailed structure of the cockroach spermatheca is described and discussed firstly as an example of an insect integumentary gland, and secondly, from the standpoint of its role in reproduction.
...
1
2
3
4
5
...