Development of the nervous system in the "head" of Limulus polyphemus (Chelicerata: Xiphosura): morphological evidence for a correspondence between the segments of the chelicerae and of the (first) antennae of Mandibulata

  title={Development of the nervous system in the
 "head" of Limulus polyphemus (Chelicerata:
 Xiphosura): morphological evidence for a correspondence between the segments of
 the chelicerae and of the (first) antennae of Mandibulata},
  author={Beate Mittmann and Gerhard Scholtz},
  journal={Development Genes and Evolution},
AbstractWe investigated brain development in the horseshoe crab Limulus polyphemus and several other arthropods via immunocytochemical methods, i.e. antibody stainings against acetylated α-tubulin and synapsin. According to the traditional view, the first appendage-bearing segment in chelicerates (the chelicerae) is not homologous to the first appendage-bearing segment of mandibulates (first antenna, deutocerebrum) but to the segment of the second antenna (tritocerebrum) or the… 
Development of the synganglion and morphology of the adult nervous system in the mite Archegozetes longisetosus Aoki (Chelicerata, Actinotrichida, Oribatida)
Within the synganglion of A. longisetosus, the authors found structures that resemble the ancestral metameric organization of the nervous system of arthropods.
The segmental organization of the head region in Chelicerata: a critical review of recent studies and hypotheses
Comparative anatomical and ontogenetic data show many similarities between the head organization of chelicerates and that of mandibulates, and lead to conclusions that contradict some of the hypotheses deduced from recent studies on developmental biology, but favour more traditional views.
Cephalic and Limb Anatomy of a New Isoxyid from the Burgess Shale and the Role of “Stem Bivalved Arthropods” in the Disparity of the Frontalmost Appendage
The diversity of frontalmost appendages in “stem bivalved” arthropods, distinct in its absence of clear clustering, is found to link the morphologies of “short great appendages,” chelicerae and antennules, and fits the hypothesis of an increase in disparity of the deutocerebral appendage prior to its diversification in euarthropods.
The chelifores of sea spiders (Arthropoda, Pycnogonida) are the appendages of the deutocerebral segment
By providing direct morphological support for the deutocerebral status of the cheliforal ganglia, this work reconciles morphological and gene expression data and argues for a corresponding position between the anterior‐most appendages in all extant euarthropods.
Implications of a cheliceral axial duplication in Tetragnatha versicolor (Araneae: Tetragnathidae) for arachnid deuterocerebral appendage development.
A new cheliceral teratology is described in the spider Tetragnatha versicolor Walckenaer, 1841, which consists on a duplication of the PD axis of the left chelicera associated with a terminal secondary schistomely on the fang of the lower axis.


Beiträge zur Embryonalentwicklung vonLimulus Polyphemus L. (Chelicerata, Xiphosura)
SummaryThe embryology of some organ systems from the beginning of the segmentation of the germ band to the first larval stage has been studied onLimulus polyphemus.The main concern was the formation
Immunocytochemical detection of acetylated alpha-tubulin and Drosophila synapsin in the embryonic crustacean nervous system.
The pattern of central axonal pathways in embryos of the caridean shrimp Palaemonetes argentinus Nobili are demonstrated by immunohistochemical detection of acetylated alpha-tubulin and synapsin by proving that immunocytochemistry against acetylation alpha- Tubulin andsynapsin are valuable tools for studying the development of the crustacean nervous system.
A conserved mode of head segmentation in arthropods revealed by the expression pattern of Hox genes in a spider.
The finding implies that chelicerates, myriapods, crustaceans, and insects share a single mode of head segmentation, reinforcing the argument for a monophyletic origin of the arthropods.
The formation, differentiation and segmentation of the post-naupliar germ band of the amphipod Gammarus pulex L. (Crustacea, Malacostraca, Peracarida)
  • G. Scholtz
  • Biology
    Proceedings of the Royal Society of London. B. Biological Sciences
  • 1990
The development of the post-naupliar germ band of Gammarus pulex is described from early germ disc to segmentation and limb-bud formation and the mode of mesoteloblast differentiation inGammarus is compared with that of other Malacostraca.
The lacinia mobilis and Similar Structures – a Valuable Character in Arthropod Phylogenetics?
A comparative SEM survey of the lacinia mobilis in Peracarida and its alleged homologues rejects the primary homology of these varied structures and strengthens interpretations of its origin as a separation of the incisor process.
The Tetraconata concept: hexapod-crustacean relationships and the phylogeny of Crustacea
Arguments for homology of the mandible throughout mandibulate arthropods and for a monophyletic Mandibulata will be presented, as well as arguments supporting the taxon Tetraconata (i.e. Crustacea + Hexapoda).
The pattern of Distal-less expression in the mouthparts of crustaceans, myriapods and insects: new evidence for a gnathobasic mandible and the common origin of Mandibulata.
A gnathobasic character of the mandibles of crustaceans, myriapods and insects supporting the monophyly of Mandibulata sensu Snodgrass is suggested.
A palaeontological solution to the arthropod head problem
  • G. Budd
  • Environmental Science
  • 2002
It is shown that a group of previously problematic Cambrian arthropods from the Burgess Shale and Chengjiang faunas form a clade close to crown-group euarthropods, the group containing myriapods, chelicerates, insects and crustaceans, and two pre-oral appendages.