Results 151 to 160 of about 468 (168)
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Journal of Ultrastructure Research, 1965
The remarkable relationship between elements of the circulatory and nervous systems in Xiphosura (Limulus) polyphemus has been investigated by light and electron microscopy. The arterial wall consists of sheets of fibrocytes which alternate with fibrous lamellae.
J N, Dumont, E, Anderson, E, Chomyn
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The remarkable relationship between elements of the circulatory and nervous systems in Xiphosura (Limulus) polyphemus has been investigated by light and electron microscopy. The arterial wall consists of sheets of fibrocytes which alternate with fibrous lamellae.
J N, Dumont, E, Anderson, E, Chomyn
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Molecular Phylogenetics and Evolution, 2012
Horseshoe crabs are marine invertebrates well known for their exceptionally low rates of diversification during their entire evolutionary history. Despite the low species diversity in the group, the phylogenetic relationships among the extant species, especially among the three Asian species are still unresolved.
Obst, Matthias +3 more
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Horseshoe crabs are marine invertebrates well known for their exceptionally low rates of diversification during their entire evolutionary history. Despite the low species diversity in the group, the phylogenetic relationships among the extant species, especially among the three Asian species are still unresolved.
Obst, Matthias +3 more
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First Fossil Xiphosuran (Chelicerata, Xiphosura) Egg Clutch from the Carboniferous of Khakassia
Paleontological Journal, 2018A new formal genus with a new species Xiphosuroides khakassicus gen. et sp. nov. is established for a clutch of nine eggs containing embryos, presumably xiphosurans (Chelicerata, Xiphosura, Bellinurina). This unique specimen comes from the Lower–Middle Carboniferous Sarskaya Formation of Khakassia (Izykhskie Kopi locality).
E. S. Shpinev, D. V. Vasilenko
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Observations on populations of the horseshoe crab Limulus (=Xiphosura) polyphemus
Population Ecology, 1978Summary Marked populations of Limulus (=Xiphosura) polyphemus reveal that in Cold Spring Harbor, New York, they consisted of 10,000–18,000 adults in 1957 and 1961. The sex ratio in 1957 was about 4 males: 1 female. Pairs may remain attached for as long as 9 days. An undisturbed female may lay as many as 12,000 eggs in one nest.
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Quarterly Journal of the Geological Society of London, 1872
I had, on a former occasion (November 21, 1866), the honour to communicate a paper to this Society “On some points in the structure of the Xiphosura having reference to their relationship with the Eurypterida”, in which were discussed the grounds for the union of these two suborders (afterwards dealt with in greater detail in the monograph of the ...
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I had, on a former occasion (November 21, 1866), the honour to communicate a paper to this Society “On some points in the structure of the Xiphosura having reference to their relationship with the Eurypterida”, in which were discussed the grounds for the union of these two suborders (afterwards dealt with in greater detail in the monograph of the ...
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Revised systematics of Palaeozoic ‘horseshoe crabs’ and the myth of monophyletic Xiphosura
Zoological Journal of the Linnean Society, 2013James C Lamsdell, Lamsdell James C
exaly
Geological Society of America Abstracts with Programs, 2023
James C. Lamsdell +2 more
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James C. Lamsdell +2 more
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Absence of Hyperglycemic Response at or after Ecdysis in Xiphosura polyphemus
Physiological Zoology, 1968openaire +1 more source
On the fine structure of spermatozoa of Tachypleus gigas(Xiphosura, Merostomata)
International Journal of Invertebrate Reproduction and Development, 1986Gerd Alberti, H H Janssen
exaly