Abstract:
:A novel approach is proposed toward quantifying changes in chaetotaxy during the development of Collembola Symphypleona. The ontogenetic trajectories method applied to the tibiotarsal chaetotaxy of Symphypleona provides a representation of their development. Every seta, through the probability of its presence, can be regarded as a character. The statistical technique of correspondence analysis is used, and new techniques for analyzing these kinds of data are discussed. Although this survey is mainly focused on methodology, biological results are also presented. The different rates and extent of chaetotaxic changes during development of the species studied are discussed. An important point demonstrated is the support this method gives to the close relationship of Mackenziella and Sminthurididae. The assumption of monophyly of the group Sminthuridae-Bourletiellidae is also reinforced, and a hypothesis of neochaetotic evolution for the genus Sminthurus is put forward. © 1996 Wiley-Liss, Inc.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
Nayrolles Pdoi
10.1002/(SICI)1097-4687(199602)227:2<127::AID-JMORsubject
Has Abstractpub_date
1996-02-01 00:00:00pages
127-143issue
2eissn
0362-2525issn
1097-4687journal_volume
227pub_type
杂志文章abstract::For better understanding of the links between limb morphology and the metabolic cost of locomotion, we have characterized the relationships between limb length and shape and other functionally important variables in the straightened forelimbs and hindlimbs of a sample of 12 domestic dogs (Canis familiaris). Intra-anim...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199711)234:2<183::AID-JMOR
更新日期:1997-11-01 00:00:00
abstract::The dorsal fin is one of the most varied swimming structures in Acanthomorpha, the spiny-finned fishes. This fin can be present as a single contiguous structure supported by bony spines and soft lepidotrichia, or it may be divided into an anterior, spiny dorsal fin and a posterior, soft dorsal fin. The freshwater fish...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20744
更新日期:2017-12-01 00:00:00
abstract::During ontogeny, the apical and basal components of dicamptodontid teeth exhibit three major developmental stages: nonpedicellate, subpedicellate, and pedicellate. Premetamorphic larvae tend to have nonpedicellate teeth, incompletely or recently metamorphosed individuals tend to have subpedicellate teeth, and fully tr...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051990204
更新日期:1989-02-01 00:00:00
abstract::Freshwater sponges of the family Spongillidae reproduce sexually through formation of a parenchymula larva. The cytochemical characteristics of parenchymula larval metamorphosis - beginning with the blastula and terminating with the motile escape stage - for the spongillid Eunapius fragilis (Leidy) have been defined u...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051450202
更新日期:1975-02-01 00:00:00
abstract::Analysis of lateral and dorsoventral radiographic films shows that ingestion, transport, and mastication in Pedetes capensis (Rodentia) are cyclic and their movement patterns are essentially similar for the three food types offered. During the ingestion cycle, closing of the mouth is accompanied by a backward translat...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052050310
更新日期:1990-09-01 00:00:00
abstract::The hypotheses of relationships within Lari (gulls) are highly unstable, and depend on whether morphological or molecular data are examined. Developmental sequence data are thought to contain phylogenetic information, but have never been applied to the problem of avian systematics. In this article, we describe the oss...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10633
更新日期:2008-09-01 00:00:00
abstract::The cloacal complex of Crocodylus porosus is composed of three chambers (proctodaeum, urodaeum, and coprodaeum) separated by tight, muscular sphincters. The proctodaeum is proximal to the cloacal vent and houses the genitalia. The urodaeum is the largest chamber, is capable of storing large quantities of urine, and is...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/1097-4687(200008)245:2<168::AID-JMOR7>3.0.
更新日期:2000-08-01 00:00:00
abstract::The paired Y-organs of crustaceans control the molting process. In males of C. antennarius, these glands are opalescent, lobulated, epithelioid structures embedded in brown fatty tissue. Cells in the periphery extend processes to the connective tissue capsule, an arrangement that suggests increased surface area for me...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051630205
更新日期:1980-02-01 00:00:00
abstract::The brine shrimp, Artemia (Crustacea, Anostraca), is a zooplankton that is commonly used in both basic and applied research. Unfortunately, Artemia embryos are often cultured under conditions that alter early development, and reports based on these cultures oversimplify or fail to describe morphological phenotypes. Th...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20344
更新日期:2015-03-01 00:00:00
abstract::Tadpoles of several different genera were fed graded suspensions of uniform polystyrene particles to determine the lower size limit of particles that could be ingested. Certain tadpoles can extract suspended particles as small as 0.126 μ in diameter from the water. In terms of particle size, this is an efficiency comp...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051370303
更新日期:1972-07-01 00:00:00
abstract::To elucidate the cellular mechanism underlying the growth of the peritoneal cover of the gut sinus and the heart in the polychaete Arenicola marina, cellular organization of these structures and proliferative potential of their cells were investigated using electron microscopy and electron microscopic autoradiography....
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10035
更新日期:2002-12-01 00:00:00
abstract::Many cases of predator-induced morphological plasticity in daphnids are well studied examples of inducible defenses. However, little is known about the early development of these sometimes conspicuous traits. We compared for the first time in five different Daphnia species the embryonic development of predator-induced...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10270
更新日期:2004-12-01 00:00:00
abstract::A biomechanical model of the jaw mechanism in some reptiles is presented. Symmetrical muscle activity that produces equal forces on both sides of the head is assumed. The model predicts the position of the most posterior bit point and offers a functional explanation for this prediction. Turtles are used to illustrate ...
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::The marine priapulid Priapulus caudatus has a voluminous body cavity filled with a blood-like fluid containing erythrocytes and leucocytes (amoebocytes). The hematocrit of animals weighing 0.5-14 gm was 2-10%. The erythrocytes contain a hemerythrin blood pigment. The structure of the coelomocytes was studied by light ...
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
abstract::This study reports a comprehensive description of penaeid spermatogenesis (Penaeus monodon) by light and transmission electron microscopy. A conspicuous characteristic of spermatocytogenesis was a ring-like structure with high electron-density adjacent to the nucleus of a primary spermatocyte. During the spermiogenesi...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20664
更新日期:2017-05-01 00:00:00
abstract::Anurans exhibit a particularly wide range of locomotor modes that result in wide variations in their skeletal structure. This article investigates the possible correlation between morphological aspects of the hylid postcranial skeleton and their different locomotor modes and habitat use. To do so, we analyzed 18 morph...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20651
更新日期:2017-03-01 00:00:00
abstract::During epidermal differentiation in mammals, keratins and keratin-associated matrix proteins rich in histidine are synthesized to produce a corneous layer. Little is known about interkeratin proteins in nonmammalian vertebrates, especially in reptiles. Using ultrastructural autoradiography after injection of tritiated...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10181
更新日期:2004-02-01 00:00:00
abstract::The mode of sexual reproduction and embryogenesis was compared in 3 species of Botrylloides: B. simodensis, B. lenis, and B. violaceus. In all species, a testis and an egg (occasionally 2 eggs), the former being anterior to the latter, mature in the mantle on either side of a zooid. The egg is surrounded by 2 follicul...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051930305
更新日期:1987-09-01 00:00:00
abstract::The muscles of the head, neck and thorax of the adult cabbage looper Trichoplusia ni are described for the first time. They are compared to those of Choristoneura fumiferana, Manduca sexta, Smerinthus geminatus, Antheraea polyphemus, Sphinx convolvuli, Crymodes devastator, and Danaus plexippus. ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051390204
更新日期:1973-02-01 00:00:00
abstract::The development of diet-induced phenotypic differences in numbers of sensilla on the antennae of the grasshopper Schistocerca americana was studied using the exuviae produced at each molt. This made it possible to follow changes within an individual insect. In the first instar, insects had similar numbers of four sens...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10026
更新日期:2002-11-01 00:00:00
abstract::Most anatomical and physiological studies of the sauropsid heart have focused on species with extraordinary physiologies, and detailed anatomical descriptions of hearts from sauropsids with more common physiologies are therefore warranted. Here, we present a comprehensive study of the cardiac anatomy of the South Amer...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10854
更新日期:2010-09-01 00:00:00
abstract::Several muroid rodent species are distributed throughout southern Africa. Some species are reportedly classified as opportunistic omnivorous rodents consuming plant, seed, and insect material. This study aims to provide a detailed morphometric analysis of the gastrointestinal tract (GIT) of four such omnivorous specie...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.20856
更新日期:2018-09-01 00:00:00
abstract::Light and electron microscopic techniques show that the eye of the marine prosobranch gastropod, Ilyanassa obsoleta, is composed of an optic cavity, lens, cornea, retina, and neuropile, and is surrounded by a connective tissue capsule. The adult retina is a columnar epithelium containing three morphologically distinct...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051810207
更新日期:1984-08-01 00:00:00
abstract::Recent molecular phylogenies conflict with traditional scleractinian classification at ranks ranging from suborder to genus, challenging morphologists to discover new characters that better agree with molecular data. Such characters are essential for including fossils in analyses and tracing evolutionary patterns thro...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.10899
更新日期:2011-01-01 00:00:00
abstract::Timed-sequence studies have shown that reticulate scales on the ventral footpads of birds do not undergo "epidermal placode" formation during their morphogenesis, but arise as symmetrical evaluations similar to the scales of snakes and lizards. Unlike the scutellate scales on the dorsal surface of the foot, in which t...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051540106
更新日期:1977-10-01 00:00:00
abstract::Early embryonic mitosis of the silkworm, Bombyx mori, was morphologically studied in the normal eggs and in the eggs treated by low temperature (-10°C). The first embryonic mitosis is observed in the eggs at 120 to 150 minutes after deposition at 26°C. After egg and sperm pronuclei unite, a spindle is formed in each o...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051580106
更新日期:1978-10-01 00:00:00
abstract::Spermatogenesis discontinues during both adult reproductive diapause and quiescence in the flightless males of Omorgus freyi. During both types of dormancy, spermatogenesis discontinuity is a dynamic process involving an uninterrupted supply of primary spermatocytes that undergoes partial development and lyses before ...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052180309
更新日期:1993-12-01 00:00:00
abstract::The fine structure of the shell and underlying mantle in young juveniles of the articulate brachiopod Terebratalia transversa has been examined by electron microscopy. The first shell produced by the mantle consists of a nonhinged protegulum that lacks concentric growth lines. The protegulum is secreted within a day a...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1051830303
更新日期:1985-03-01 00:00:00
abstract::The feline anterior sartorius is a long strap-like muscle composed of short muscle fibers. Nerve branches that enter this muscle contain the axons of motor units whose constituent muscle fibers are distributed asymmetrically within the muscle. In the present study, twitch and tetanic isometric contractions were evoked...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/jmor.1052130204
更新日期:1992-08-01 00:00:00
abstract::The coiled shell of gastropods begins as a cap-shaped lens of organic and calcified material that covers the posterior dorsal side of the larva. During development the cap enlarges to cover the larval visceral mass. Marginal growth then produces the characteristic coiled shell. One model of the initiation of shell coi...
journal_title:Journal of morphology
pub_type: 杂志文章
doi:10.1002/(SICI)1097-4687(199801)235:1<77::AID-JMOR6
更新日期:1998-01-01 00:00:00