Abstract：
:During suction feeding teleost fish have to start mouth opening prior to other expansion movements of the head such as operculo-suspensorium abduction. The distribution of the input force over the various expansion movements is determined by the position of the hyoid in the expansion apparatus. Based on a three-dimensional (3-D) kinematic model of this apparatus it can be calculated at which positions of the hyoid operculo-suspensorial abduction is precluded. For 73 cichlid species from various African lakes and covering a wide array of feeding types and adult sizes, it is demonstrated that these optimal positions for the onset of suction feeding can be attained or closely approached by species whose regular diet only requires suction feeding but not by species whose regular diet is dominated by items requiring forceful biting. It is argued that the suboptimality of the biters is due to an architectonic constraint, viz. an increase in head width necessary to accommodate their enlarged m. adductor mandibulae. Although it is theoretically feasible to optimize the model's parameters for every head width, the biters apparently have not achieved such an adaptive change. As these parameters also feature in the execution of other functions, it is likely that conflicting demands on their optimal value overrule their optimization for the starting position of the hyoid of biters. The results hold for cichlids of independently evolved species flocks and therefore concern general rules for biter-sucker transformations in cichlids. © 1996 Wiley-Liss, Inc.
journal_name
J Morpholjournal_title
Journal of morphologyauthors
De Visser J,Barel CDNdoi
10.1002/(SICI)1097-4687(199604)228:1<1::AID-JMOR1>subject
Has Abstractpub_date
1996-04-01 00:00:00pages
1-18issue
1eissn
0362-2525issn
1097-4687journal_volume
228pub_type
杂志文章abstract：:Despite the attention squamate lizards have received in the study of digit and limb loss, little is known about limb morphogenesis in pentadactyl lizards. Recent developmental studies have provided a basis for understanding lizard autopodial element homology based on developmental and comparative anatomy. In addition,...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10875
更新日期：2010-11-01 00:00:00
abstract：:The present study examined the morphometric properties of the forelimb, including the inertial properties of the body segments and the morphometric parameters of 21 muscles spanning the shoulder and/or elbow joints of six Macaca mulatta and three M. fascicularis. Five muscle parameters are presented: optimal fascicle ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/1097-4687(200009)245:3<206::AID-JMOR3>3.0.
更新日期：2000-09-01 00:00:00
abstract：:Light and electron microscopic examination demonstrated two types of non-endocrine agranular cells, cavity boundary cells and stellate cells, in the adenohypophysis of the South American lungfish, Lepidosiren paradoxa. The cavity boundary cells line the hypophyseal cleft and diverticulum and display few microvilli, oc...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052070109
更新日期：1991-01-01 00:00:00
abstract：:An otolith increment is composed of an incremental zone and a discontinous zone. Observation of the otoliths of Oreochromis niloticus with transmission and scanning electron microscopy reveals that organic fibers are concentrated in the discontinuous zone and are relatively scarce in the incremental zone. On the other...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052110210
更新日期：1992-02-01 00:00:00
abstract：:African lungfish (Protopterus) seem unique among osteognathostomes in possessing a potential vomeronasal organ homolog in form of accessory epithelial crypts within their nasal cavity. Many details regarding structural and functional properties of these crypts are still unexplored. In this study, we reinvestigate the ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20673
更新日期：2017-06-01 00:00:00
abstract：:The mammary gland is a common site of neoplasms in the female cat. All the malignant tumors metastasize to a lesser or a greater extent through the lymphatic system. However, the anatomical knowledge of this system is not sufficiently well known in cats to develop a reasoned model for the extirpation of these glands i...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10403
更新日期：2006-03-01 00:00:00
abstract：:The spinotectal somatosensory projection was compared in normal, genetically eyeless, and embryonically manipulated salamanders. In normal animals, serotonin fluorescence was restricted to the intermediate tectalneuropil. This same region showed both high levels of serotonin uptake and somatosensory single unit electr...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051700105
更新日期：1981-10-01 00:00:00
abstract：:The differences in angulation and length observed for the fibers of anatomical muscles may reflect two distinct mechanical requirements: arrangement for pinnation, reflecting an increase in physiological cross-section and arrangement for equivalent placement of sarcomeres, possibly associated with coordination. The ob...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051920106
更新日期：1987-04-01 00:00:00
abstract：:Head structures of the leaf mining larva of the chrysomelid species Podagricomela shirahatai are described and illustrated. Internal and external structures were reconstructed three dimensionally based on image stacks obtained with microcomputed tomography. The larval head is characterized by prognathism, a dorsoventr...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20352
更新日期：2015-04-01 00:00:00
abstract：:Amphisabenia is a group of squamates adapted for a fossorial lifestyle. The skull is the animal's the main digging tool, and can present one of four principal shapes. The shovel-headed shape is considered to be the most specialized for digging. The South American genus Leposternon presents a shovel-headed morphotype, ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20899
更新日期：2018-11-01 00:00:00
abstract：:Homolid crabs (Hypsophrys) from water deeper than 700 m in the Straits of Florida and Arabian Sea have smooth darkened oval spots contrasting with the surrounding roughened integument on inner and outer surfaces of each pincer at the base of the fixed finger. Cuticle is thinner over these spots than over surrounaing t...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051500407
更新日期：1976-12-01 00:00:00
abstract：:Cytoplasmic microtubules can be divided into two subpopulations: 1) those adjacent to the nucleus (perinuclear), and 2) those distributed between the myofilament bundles (nonperinuclear). Previous observations (Cartwright and Goldstein, '83) indicate total cytoplasmic microtubule numeric density increases to a maximum...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051790103
更新日期：1984-01-01 00:00:00
abstract：:Prey capture in Agama stellio was recorded by high-speed video in combination with the electrical activity of both jaw and hyolingual muscles. Quantification of kinematics and muscle activity patterns facilitated their correlation during kinematic phases. Changes in angular velocity of the gape let the strike be subdi...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052240306
更新日期：1995-06-01 00:00:00
abstract：:The posterior half of the channel catfish intestine has a similar histological organization to that of other teleost fishes. This region is organized into a muscosa, a submucosa, a double layered muscularis and a serosa. A "stratum compactum" of dense connective tissue was confirmed for the submucosa. In its histology...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051450405
更新日期：1975-04-01 00:00:00
abstract：:Internal and external head structures of males of Strepsiptera were examined and the head of a species of Mengenilla is described in detail. The results suggest a reinterpretation of some structures. The head of basal extant strepsipterans is subprognathous, whereas it is strictly orthognathous in the groundplan of St...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10261
更新日期：2006-05-01 00:00:00
abstract：:The functional anatomy of the hindlimb of 12 species of viverrids was studied with relation to locomotion. The animals were allocated to primary locomotor categories on the basis of their anatomy and locomotion. The climbing, arboreal walking category (Nandinia binotata) is characterized by a small sacroiliac articula...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051480208
更新日期：1976-02-01 00:00:00
abstract：:From the elongated neck of the giraffe to the elaborate train of the peacock, extreme traits can result from natural or sexual selection (or both). The extreme chelicerae of the long-jawed spiders (Tetragnatha) present a puzzle: do these exaggerated chelicerae function as weapons or genitalia? Bristowe first proposed ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21282
更新日期：2020-10-19 00:00:00
abstract：:We described the topography and morphometry of the testicular artery, pampiniform plexus veins, and indirect connections between them in the spermatic cord of the bull. Sixty microcorrosive casts of bovine spermatic cords were analyzed macroscopically, by stereomicroscopy, and by scanning electron microscopy. The aver...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10929
更新日期：2011-04-01 00:00:00
abstract：:Larval and juvenile air breathing fish may experience nocturnal and/or seasonal aquatic hypoxia. Yet, whether hypoxia induces respiratory developmental plasticity in larval air breathing fish is uncertain. This study predicted that larvae of two closely related anabantid fish-the facultative air breather the Siamese f...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20931
更新日期：2019-02-01 00:00:00
abstract：:The vertebrate head as a major novelty is directly linked to the evolutionary success of the vertebrates. Sequential information on the embryonic pattern of cartilaginous head development are scarce, but important for the understanding of its evolution. In this study, we use the oriental fire bellied toad, Bombina ori...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.21138
更新日期：2020-06-01 00:00:00
abstract：:After placing in vitro, central subgerminal ooplasm (containing a central nucleus of Pander) from a quail germ disc of a prelaid egg (before symmetrization) on the upper layer of an isolated chicken antisickle, we observed the induction of a radially oriented preneural plate (without interference of chordamesoblast). ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10203
更新日期：2004-05-01 00:00:00
abstract：:Sperm performance is likely to be an important determinant of male reproductive success, especially when females copulate with multiple males. Understanding sperm performance is therefore crucial to fully understand the evolution of male reproductive strategies. In this study, we examined the repeatability of sperm mo...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20346
更新日期：2015-04-01 00:00:00
abstract：:The masticatory pattern of Sphenodon punctatus, the sole remaining rhynchocephalian, now restricted to islands off the coast of New Zealand, has been analyzed by detailed anatomy, cinematography, cinefluoroscopy, and electromyography. Food reduction consists of a closing, crushing bite followed by a propalineal slidin...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051710307
更新日期：1982-03-01 00:00:00
abstract：:The phylogenetic position of the Ectoprocta within the Lophotrochozoa is discussed controversially. For gaining more insight into ectoproct relationships and comparing it with other potentially related phyla, we analysed the myoanatomy and serotonergic nervous system of adult representatives of the Phylactolaemata (Pl...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.11006
更新日期：2012-01-01 00:00:00
abstract：:The strongly modified mode of development of the small and brooding galeommatoid bivalve Lasaea adansonii (Gmelin, 1791) [syn. Lasaea rubra (Montagu, 1803)] has been studied by means of transmission and scanning electron microscopy and by fluorescent staining of the muscular system and of two neurotracers, FMRFamide a...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.10623
更新日期：2008-06-01 00:00:00
abstract：:A large sample of embryological material of the North American paddlefish Polyodon spathula (Acipenseriformes: Polyodontidae) confirms that early development in Polyodon is very similar to that reported for the sister group of Polyodontidae, the sturgeons (Acipenseridae). Polyodon illustrates many basic aspects of aci...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052130106
更新日期：1992-07-01 00:00:00
abstract：:The dorsal vessel (DV) in the abdomen of the blood-feeding insect Rhodnius prolixus was divided functionally into two regions, the heart, into which haemolymph entered the DV through four pairs of ostia located in abdominal segment VII, and the aorta, along which the haemolymph was propelled from abdominal segment VI ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1052040103
更新日期：1990-04-01 00:00:00
abstract：:We investigated if and how the inner ear region undergoes similar adaptations in small, fossorial, insectivoran-grade mammals, and found a variety of inner ear phenotypes. In our sample, afrotherian moles (Chrysochloridae) and the marsupial Notoryctes differ from most other burrowing mammals in their relatively short ...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20391
更新日期：2015-08-01 00:00:00
abstract：:It is well established that the capacity for teeth to differentiate "in vitro" depends upon: a) the age of the embryonic rudiments at the time of excision and b) the number of cells within each tissue type which are capable of differentiating into organ culture. This paper studies ultrastructural aspects of tooth buds...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.1051650302
更新日期：1980-09-01 00:00:00
abstract：:Astroblepidae or "climbing catfishes" encompass a single genus of species living in high altitude rivers in the Andes of South America. They are characterized by a specialized head morphology closely resembling their better known, widely radiated sister family Loricariidae, or armored suckermouth catfishes. Existent d...
journal_title：Journal of morphology
pub_type： 杂志文章
doi：10.1002/jmor.20169
更新日期：2013-10-01 00:00:00
