Abstract:
:Spermatozoa from representatives of the five insect orders in superorder Neuropteroidea were examined by electron microscopy following a new fixation method that includes tannic acid in the primary fixative but has uranyl acetate rather than osmium tetroxide as the secondary fixative. The sperm axoneme was found to be similar in the four orders Megaloptera, Raphidioptera, Neuroptera, and Coleoptera, and is characterized above all by its so-called intertubular material being divided into two portions, one located outside, but in contact with the doublet, and the other projecting from the accessory tubule and having a beak-like shape. These features have not been seen in insects from other orders and may be a synapomorphy for these neuropteroid orders. The accessory tubules in these four orders have 16 protofilaments. The shape of the accessory bodies adjacent to the mitochondrial derivatives is nearly the same in insects from the more primitive neuropteroid orders and in Coleoptera. The sperm tail of the examined strepsipteran deviates in several respects from that of other neuropteroids: the particle row in the wall of accessory tubules is incomplete, an intertubular material is missing, and the mitochondria contain no crystal. © 1994 Wiley-Liss, Inc.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Afzelius BA,Dallai Rdoi
10.1002/jmor.1052190104subject
Has Abstractpub_date
1994-01-01 00:00:00pages
15-20issue
1eissn
0362-2525issn
1097-4687journal_volume
219pub_type
杂志文章abstract::The results of an ultrastructural investigation of the gastric glands of the ruin lizard are reported. In this reptile the stomach can be divided into a larger fundus and a smaller pars pilorica. Fundic glands are characterized by three main kinds of cells: mucous, endocrine, and oxynticopeptic; the latter were not ob...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2000-02-01 00:00:00
abstract::Non-innervated macrotrichia and microtrichia, thick-walled chemoreceptors and three kinds of thin-walled chemoreceptors are present on the antennal flagellum of Frenesia missa. One of the thin-walled receptors, the plate organ, is of a type not previously recorded for any insect. About four times as many plate organs ...
journal_title:Journal of morphology
pub_type: 杂志文章
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051600204
更新日期:1979-05-01 00:00:00
abstract::Ultrastructural studies of spermiogenesis and sperm morphology have found many characters that are likely to provide clues to the phylogeny of the Platyhelminthes. However, the lack of information on many free-living groups has been a limiting factor. There is a single description of the spermatogenesis and spermatozo...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2018-05-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051520205
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052030305
更新日期:1990-03-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051690207
更新日期:1981-08-01 00:00:00
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journal_title:Journal of morphology
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更新日期:1981-06-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1994-08-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20168
更新日期:2013-10-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052120105
更新日期:1992-04-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052030303
更新日期:1990-03-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051400309
更新日期:1973-07-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10544
更新日期:2007-08-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052050207
更新日期:1990-08-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1992-12-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2013-06-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051820105
更新日期:1984-10-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1996-08-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2009-03-01 00:00:00
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journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:1997-08-01 00:00:00
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更新日期:1994-04-01 00:00:00
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journal_title:Journal of morphology
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更新日期:2012-01-01 00:00:00
abstract::The phylogenetic position of bryozoans has been disputed for decades, and molecular phylogenetic analyzes have not unequivocally clarified their position within the Bilateria. As probably the most basal bryozoans, Phylactolaemata is the most promising taxon for large-scale phylogenetic comparisons. These comparisons r...
journal_title:Journal of morphology
pub_type: 杂志文章
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更新日期:2011-03-01 00:00:00
abstract::In viviparous, teleost fish, with postfertilization maternal nutrient provisioning, embryonic structures that facilitate maternal-fetal nutrient transfer are predicted to be present. For the family Poeciliidae, only a handful of morphological studies have explored these embryonic specializations. Here, we present a co...
journal_title:Journal of morphology
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更新日期:2017-12-01 00:00:00