Showing papers in "Zoological Journal of the Linnean Society in 1989"

TL;DR: Revue des donnees quantitatives sur le prelevement de the meiofaune par les poissons et,enfin, mise en evidence du role that pourrait jouer la meIOfaune dans l'elevage des poisson.

TL;DR: The lower actinopterygian fishes are classified using dermal skull roof pattern, in particular the various configurations displayed by the bones on the otic branch of the infraorbital canal (dermosphenotic, intertemporal-supratemporal/dermopterotic).

TL;DR: Cladistic analysis suggests that Arachnida is monophyletic and that absence of extensor muscles is a primitive condition, and phylogenetic relationships among ‘extensorless’ groups cannot be resolved solely on the basis of appendicular characters.

TL;DR: This preliminary research demonstrates that a detailed ontogenetic interpretation of the vertebral centra and of the caudal skeleton of different teleosts may be useful tools for further interpretations of teleostean interrelationships.

TL;DR: On examine l'utilisation de la meiofaune pour la detection and the quantification des perturbations de l'environnement marin par l'homme.

TL;DR: Two Triassic sphenodontid reptiles, Brachyrhinodon taylori and Polysphenodon mulleri, are redescribed and it is assumed that the reduced snout has been independently derived in each genus.

TL;DR: Paired fin skeleton and relationsships of the fossil group Porolepiformes (Osteichtyes: Sarcopterygii) are studied.

TL;DR: Interpretation of the cladogram suggests that, within Syrphinae, a system of five tribes can be recognized and that a major trend has been a shift from ground layer to arboreal larval habitats, with an increasing degree of obligate dependence on soft-bodied Homoptera as prey.

TL;DR: It is concluded that the changes in skull organization seen during the evolution of dicynodonts are consistent with the hypothesis that a propalinal jaw action was being improved by selection, and that this was required to permit dicyynodons to be efficient herbivores.

TL;DR: The name Hydra attenuata Pallas is currently applied to the wrong animal, and the pale hydra should be recognized by the current, generally accepted binominal H. circumcincta Schulze.

TL;DR: The reconstructed Monganucodon cochlear cavities differ from extant mammalian cochleas in several respects: they are uncoiled, shorter in length, and lack the bony lamina which supports the basilar membrane.

TL;DR: The morphology of abdominal and alar androconial organs of four species representing four genera of danaine butterflies is described in detail, based mainly on scanning electron microscopy, with respect to functional significance and phyletic development of the organs.

TL;DR: Correlation and regression analyses against carapace width on log-transformed data showed that major chelae of right-handed crabs grow proportionately higher with increasing size and the ideal mechanical advantage increases; concurrently, the fingers of the minorChelae grow proportionate longer.

TL;DR: Crossbred rams produced by mating Soay ewes with Portland or Merino rams had a seasonal testicular cycle intermediate in timing compared to the pattern characteristics of the parent breeds; this is consistent with the involvement of multiple genes in the mechanism controlling the sexual cycle in the ram.

TL;DR: Functional similarities indicate either phylogenetic relationship or convergence with respect to Diptera, and control of ventral flexion, which occurs at the end of the downstroke, allows fast, unpredictable manoeuvres.

TL;DR: It is concluded that the earliest Metazoa could have evolved in anaerobic marine sand and that the early Plathelminthomorpha and Aschelminthes did so.

TL;DR: This paper presents an account of the general biology of the moths, and reviews the literature on Creatonotos as a basis for reports on experimental work.

TL;DR: Certain features such as size spectra, the life-history characteristics of the macrobenthos, and the energetic balance between ecological compartments of the marine ecosystem are considered to result from evolution away from negative interactions with the meiobenthos.

TL;DR: The gonads of Lepidogalaxias salamandroides are structurally distinctive and the function of a modified scale sheath in copulation is unique among teleosts.

TL;DR: The generic name Urotheca Bibron, 1843 is revived for a group of Neotropical colubrid snakes diagnosed by a long, thickened but fragile tail and the presence of a specialized naked pocket on the asulcate surface of the hemipenial capitulum.

TL;DR: It is concluded that the differential rates of wear of the enamel surfaces are necessary in maintaining the sharp cutting edges and effective crushing basins of the tribosphenic molar, and the ultrastructural arrangements of theEnamel prisms are of functional significance.

TL;DR: The first non-metric principal component, the second metric principal component and the second canonical variate are significantly correlated, and it is considered that these together represent a general trend of evolutionary advance.

TL;DR: Larval evidence supports the view that the chthamaloid nauplii are related more closely than other balanomorphs to the lepadomorphs, and that the coronuloids and balanoids share a comon derivation from the chthyamaloids.

TL;DR: The optimal time for mating and the place of ram lambs in the social system are discussed, and the breeding season in other British breeds of sheep demonstrates a strong correlation with latitude.

TL;DR: It is concluded that P. mergli reinforces the view that the convex surface of the mitrates was ventral in life, and a new homology proposed between the anterior ventral fore-tail plates of cornutes and what were formerly called plates g and j of mitrates.

TL;DR: Test de l'hypothese que la presence d'une femelle reduit la mortalite des œufs de sa couvee étude des changements de comportement des femelles couveuses selon les conditions hydriques auxquelles elle est soumise.

TL;DR: Sixteen species of the tanaidacean subfamily Pseudotanainae and three of the family Nototanaidae have been recorded from shallow and deep waters in the north-east Atlantic and the present record is the first for the Northern Hemisphere.

TL;DR: The general form of the swimbladder is described and illustrated for representatives of 50 out of the 82 genera of clupeoid fishes (families Chirocentridae, Clupeidae, Pristigasteridae and Engraulididae of the suborder Clupeoidei), based mainly on preserved specimens.

TL;DR: It is suggested that terrestrial and semi-terrestrial species evolved from a marine ancestor; the upper littoral and marine environments have been recolonized by descendants from a terrestrial ancestor.