How To Use Sinistral In A Sentence
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These gastropods have slender, high-spired, multiwhorled shells bearing a sinistral protoconch and were united by Knight in the family Streptacididae.
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Zhang noted that both sinistral and dextral Pa and Pb elements differed entirely.
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There are dextral species, sinistral species, and a variable species (P. suturalis-see below) all within the same genus.
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It extends parallel to Xianshuihe fault, which is a major active sinistral strike-slip fault in eastern Tibet Plateau.
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There is no trend from dextrality to sinistrality, but rather large clades characterized by one form or the other, sometimes with large-ish subclades of the complementary type.
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[CHAMA CORTICOSA] Shell thick, squamose, or concentrically laminated and imbricate; lamina striated, sinistral, crenulated interiorly; upper valve flat.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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By the Early Devonian the Iapetus Ocean had closed and was replaced in northern Britain by an essentially transtensional regime with sinistral shearing, and accompanied by major igneous activity.
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The north - east fracture which is the south boundary of Yanshan fault block relative notable sinistral movement.
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Sinistral individuals exhibit dominance of the left hand and eye.
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It is commonly assumed that the Stanovoy sinistral shear zone and the Sakhalin-Hokkaido dextral shear zone in NE Asia are two conjugate strike-slip faults related to the India-Eurasia collision.
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The evolutionary result of this is that sinistral species or closely related species with oppositely coiled shells are more common among tall-shelled lineages than among wide-shelled ones.
How snails mate: Oxyloma retusa
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So the spiral of the operculum of a dextral (right-handed) snail is invariably counterclockwise, while that of a sinistral shell is the opposite.
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The temporal distribution of first appearances of sinistral clades as documented by fossils generally differs from that of clades with a labral tooth.
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Handedness is known to affect patterns of mating in gastropods, making it likely that the establishment of sinistrality in dextral lineages is associated with sexual selection.
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Nevertheless, sinistral and dextral Pb elements are virtually mirror images, that is, they are more alike than the corresponding elements in L. variabilis.
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Being one who is sinistral in the manipulation of firearms and other worldly devices, I have depended on Savage rifles for quite some time.
Some Savagery for the New Year
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Although data on vertical displacement on the Klima fault zone are limited, the horizontal component is clearly much larger, and the Klima fault zone represents a sinistral strike-slip fault.
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Such selection is inimical to the evolution of traits like sinistrality that, at least in their early stages of development, are accompanied by mildly deleterious side effects.
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This paper tentatively identifies two lineaments and a fault that may relate to sinistral strike-slip faulting in the pre-Paradox Formation basement beneath Upheaval Dome.
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So Dave your task as a fellow sinistral shooter is to check out the new Ruger lefty line up at the Shot Show next week and report back on anythng sexy you find (including booth babes).
A Semi-Painful Reunion
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Deposition of the unconformably overlying Red Bay Group was terminated in latest Lochkovian times by renewed sinistral strike-slip faulting.
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What I mean to suggest here is that sinistrality was encoded as a sign of self-portraiture itself.
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This protoconch is discoidal or almost dicoidal and sinistral.
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Further evidence that species-level sinistrality originated in environments where predator-induced selection is weak comes from the biology of living left-handed species.
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a sinistral flatfish lies with the left eye uppermost
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In plan view, several specimens show minor changes in the generally linear orientation with either a sinistral or a dextral turn.
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Limited, but consistent data from mesoscale slip indicators suggest sinistral shear with a minor normal component.
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Commonly there is a partitioning of sinistral and dextral criteria on alternate horizons, but horizons occur where both senses coexist.
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Therefore, an aberrant individual with a tall sinistral shell among tall-shelled dextral conspecifics is more likely to be able to mate and leave offspring than one with a wide sinistral shell among wide-shelled dextral conspecifics.
How snails mate: Oxyloma retusa
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-- (Fig. 159.) Shell subulate, sinistral, thick, costate, sutures small; whirls, ten, flat; ribs three, moniliform; columella smooth; canal short and deep.
Report of the North-Carolina Geological Survey. Agriculture of the Eastern Counties: Together with Descriptions of the Fossils of the Marl Beds
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A sinistral snail, on the other hand, would have its genital opening on the left side of its head.
How snails mate: Oxyloma retusa
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It is interesting to speculate why most screw threads are dextral and only a relatively small number are sinistral threads.
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Sinistral individuals in normally dextral populations often deviate slightly in shell form from wild-type dextrals, perhaps implying that the left-handed condition has small deleterious side effects.
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In conclusion, the geological characteristics of the South China Sea cannot be explained by a pull-apart model involving a releasing bend of a sinistral strike-slip fault.
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In this interpretation, the Troodos ophiolite formed to the east (in its current orientation) of a ridge-transform ridge intersection, in which the transform had a dextral offset and sinistral slip.
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Therefore, an aberrant individual with a tall sinistral shell among tall-shelled dextral conspecifics is more likely to be able to mate and leave offspring than one with a wide sinistral shell among wide-shelled dextral conspecifics.
How snails mate: Oxyloma retusa
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As its name implies and the above picture shows, B. sinistrum is a left-handed or sinistral species.
Archive 2009-03-01
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The unusual change in shell coiling from dextral to sinistral during their ontogeny represents a character which makes their recognition in the fossil record easy.
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Kinematic indicators for main phase deformation fabrics consistently demonstrate a sinistral sense of displacement with a minor southeasterly component of downthrow.
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Interlinked systems of predominantly sinistral detachment faults are developed lying parallel to or at low angles to bedding.
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The latter species has a smooth, valvatiform, dextrally coiled teleoconch and a sinistral, anastrophic (coaxial heterostrophic) protoconch.
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The Halloween zombie snail with its sinistral shell is indeed amusing.
One problem with Google Maps
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Asymmetric boudins in the shear zone indicate a sinistral shear sense.
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The effectiveness and consequentiality of said lying was even more lopsidedly sinistral.
The Volokh Conspiracy » Some Fairness Doctrine History:
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If the umbilicate side is directed downward and the flat side upward, this gives the impression the shell is sinistral or a left-handed spiral, because the aperture when held toward the observer is on the left.
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And so it was that he left hearth and sinistral home; lord idiot father and princess thief mother, with no word, and so also Pandia, daughter of Hippodamia, that white-fire striking heated beauty, sat all unknowing like a dwarf in the sand, or a hippo/horse with five hearts and a dung heap for a pillow, of her lover's fate.
The Sea at Sea (or Why is There a Question Instead of Not a Question)
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sinistral individuals exhibit dominance of the left hand and eye
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a sinistral gastropod shell with the apex upward has its opening on the left when facing the observer
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Even as a sinistral I found this quite a struggle.
Cryptic crossword No 25,212
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But at one time, handedness (twist direction of the shell) was equally distributed within some snail species that have become predominantly dextral or, in a few species, predominantly sinistral.
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If the umbilicate side is directed downward and the flat side upward, this gives the impression the shell is sinistral or a left-handed spiral, because the aperture when held toward the observer is on the left.
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Sinistral clades also did not originate in the less planktonically productive insular Indo-West Pacific and Caribbean.
