sinistrally


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sin·is·tral

(sĭn′ĭ-strəl, sĭ-nĭs′trəl)
adj.
1. Of or facing the left side.
2. Left-handed.
3. Zoology Relating to or being a gastropod shell that has its aperture to the left when facing the observer with the apex upward.
sin′is·tral·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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Distortion 115[degrees] sinistrally. Body outline broadly ovate, widest across pereomere 5.
Redescription of Bathygyge grandis Hansen, 1897 (Crustacea, Isopoda, Bopyridae) from Southern California with erection of a new subfamily, Bathygyginae
Shell shape discoidal, number of whorls 4, umbilicus perforate, shell greenish brown in colour, finely ridged, concavely flattened on both sides, coiled sinistrally, body whorl large, aperture broad and ear shaped, non-operculate, margin of the shell are thin, umbilicus wide, sculpture with spiral striations.
Freshwater Snail Fauna of Pothwar Region, Pakistan

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