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  • Springer  (177,357)
  • Wiley-Blackwell  (31,913)
  • Springer Science + Business Media
  • 1970-1974  (209,270)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Zoomorphology 74 (1973), S. 323-348 
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung 1. Topographie und Histologie der Speicheldrüsen vonPolyxenus lagurus, Craspedosoma rawlinsii undSchizophyllum sabulosum werden lichtund elektronenmikroskopisch untersucht und beschrieben. 2. P. lagurus besitzt nur eine paarige Glandula salivalis in den ersten beiden Rumpfsegmenten und im Hinterkopf lateral vom Darm. Ihr Ausführkanal mündet auf dem Gnathochilarium in den Präoralraum. Die Drüse ist in eine Haupt- und eine Nebendrüse untergliedert. Beide Abschnitte unterscheiden sich elektronenmikroskopisch. 3. C. rawlinsii besitzt im Vorderkopf zwei Paar Glandulae salivales anteriores und eine paarige Glandula salivalis lateralis, die auf dem Epipharynx in den Präoralraum münden. Die Ausführkanale von zwei paarigen Glandulae salivales maxillares münden dagegen in die Ausführgänge der Maxillarnephridien. Ihre Speicheldrüsenfunktion wird nicht zuletzt deshalb angezweifelt. Ein Paar langer Glandulae salivales posteriores erstreckt sich vom Mitteldarm durch den gesamten Vorderrumpf und mündet auf dem Gnathochilarium beiderseits vom Hypopharynx in den Präoralraum. 4. Sch. sabulosum besitzt eine paarige Glandula salivalis anterior in Vorderkopf und eine paarige Glandula salivalis posterior im Vorderrumpf. Ihre Ausführkanäle münden auf dem Epipharynx bzw. auf dem Gnathochilarium in den Präoralraum.
    Notes: Summary 1. Topography and histology of the salivary glands ofPolyxenus lagurus, Craspedosoma rawlinsii andSchizophyllum sabulosum were studied by light and electron microscopy and are described. 2. InP. lagurus there is only one paired glandula salivalis in the first two metameres of the trunc and the back of the head laterally to the gut. Its exretory duct opens into the preoral cavity on the gnathochilarium. The gland is divided in a main gland and a secondary gland. Electron microscopy reveals an obvious difference between the two segments. 3. C. rawlinsii possess two pairs of glandulae salivales anteriores and a paired glandula salivalis lateralis in the front of the head, which open into the preoral cavity at the epipharynx. The exretory ducts of the two paired glandulae salivales maxillares, however, open into the ducts of the maxillary nephridia. Therefore their salivary function is called in question. A pair of long glandulae salivales posteriores extend from mid-gut throughout the anterior part of the trune and opens into the preoral cavity on both sides of the hypopharynx at the gnathochilarium. 4. Sch. sabulosum possess a paired glandula salivalis anterioris at the front of the head and a paired glandula salivalis posterioris in the anterior part of the trunc. Their exretory ducts open into the preoral cavity at the epipharynx and the gnathochilarium respectively.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The histological structure of the veliger of Cymbulia peroni is described at the stage close to metamorphosis and during the metamorphosis. Major transformations are observed in the tegument and in the digestive system.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Certain temperatures and H-Ion concentrations are necessary for the development of male and female reproductive organs. The differentiation of the reproductive system from undifferentiated cells conforms precisely with data on other species of Stenostomum.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Zoomorphology 68 (1970), S. 37-68 
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The histology of the four types of silk gland, occurring in the wolf spider Pardosa amentata are given. The changes in epithelium height, lumen breadth and size of the granules were studied in relation to silk production in the sub-adult and adult stage of the life-cycle.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Zoomorphology 68 (1970), S. 127-139 
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The ossification of the limb bones in newborn primates has been studied roentgenographically in 5 species of Prosimiae and 6 species of Simiae. These observations were compared with earlier data and discussed with regard whether they should be classified as altricial or precocial animals.
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  • 6
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The gross morphology and ultrastructure of the Malpighian tubules and hindgut in adults of the water bug Cenocorixa bifida (Hung.) is described. These are compared with similar structures in other insects with a view to relating the observed structure with potential function.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Zoomorphology 68 (1970), S. 343-369 
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract To facilitate further physiological investigation, a survey was undertaken of all the slit sense organs to be found on the body of the spider Cupiennius salei. We counted and mapped more than 3 000 sensory slits in the cuticle about half of which are combined to small groups of up to 29 slits forming compound or lyriform organs.
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  • 8
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Three non-homologous structures act as intromittent organs: ligula (Zygoptera), hamuli posteriores (Anisozygoptera, ), vesica spermalis (Anisoptera). Ligula and vesica spermalis are anchored by means of hydraulically working “gland”-structures, Ligula-Schwellkörper and Vesica spermalis-Schwellkörper respectively. A sperm-pump (Ausspritzkammer) extends the function of Vesica spermalis-Schwellkorper in non-aeschnoid Anisoptera, a group found to be monophyletic. The study includes a depiction of the peripheral abdominal nerves of larva and imago.
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  • 9
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The process of pigmentation of oil-droplets in the retina of three reptiles has been investigated with regard to ontogeny. — The ability of these animals to perceive colors was tested on different stages of life. Young Lacerta vivipara, with still uncolored oil-droplets., show optomotoric reactions to colors.
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Zoomorphology 72 (1972), S. 331-340 
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. The larval eye of the deep-sea fish Cataetyx memorabilis differs from the eye of the adult in several morphological facts: Its position is lateral, the shape is circular, the diameter is 30% of the head's length. (In the adult: position of eyes is dorsal, shape of eye is oval and the main axis corresponds to 8.3 % of the head's length.) 2. Anatomically 9 different retinal layers can be distinguished in the larval eye, with the bipolar cell—and the ganglion cell layer being the widest ones. 3. Ultrastructural investigations revealed grouped photoreceptors, rod-shaped pigment granules and lipid bodies in the choroid. 4. Serial sections allowed the reconstruction of the path of the optic nerve from the anterior-ventral part of the eye to the anterior-lateral zone of the brain. 5. Despite the larval character of the absence of outer segments, the larval eye seems to be suited for life in the mesopelagial, for it shows the typical adaptations to vision in twilight zones, e.g. enlargement of eye, pupil and lens; ratio of photoreceptor- to bipolar- to ganglion cell bodies 100:20:20 (i.e. grouped photoreceptors); absence of large posterior chamber and presence of lipid particles in the choroid.
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