What is the meaning of auct. non, emend., ined., nom. nov., nom. nud., s.l., s.s., and vide (!)?

Name: Problem 51, Chapter 16: Plant Systematics
Uploaded: 2020-07-05T23:05:33-08:00
Duration: 12 min 48 s
Channel: Megha Ramappan
Description: What is the meaning of auct. non, emend., ined., nom. nov., nom. nud., s.l., s.s., and vide (!)?

step 1 So first things first, it's good to know what D and L stand for. So D stands for Dextro Rotary a

What is the meaning of auct. non, emend., ined., nom. nov.,...

Key Concepts

auct. non

This abbreviation stands for the Latin phrase meaning 'of authors, not' and is used to indicate that the usage of a name or concept by later authors deviates from the original or accepted definition. It highlights a discrepancy in interpretation among different taxonomic treatments.

emend.

Short for 'emended', this term is used when a name or description has been corrected or modified from its original form. In taxonomic nomenclature, emendations ensure that descriptions are updated to reflect new insights or corrections.

ined.

Derived from the Latin 'ineditus', meaning 'unpublished', this abbreviation is applied to names or descriptions that have not been formally published or validated. It signifies that the information is preliminary and not officially recognized in scientific literature.

nom. nov.

This abbreviation stands for 'nomen novum', meaning 'new name'. It is used when a new name is proposed to replace a pre-existing name, often to resolve issues such as homonymy or taxonomic ambiguity, ensuring clarity and consistency.

nom. nud.

Short for 'nomen nudum', meaning 'naked name', this term refers to a name that has been mentioned in the literature without an adequate or formal description. Such names do not meet the requirements for valid publication under the rules of nomenclature.

s.l.

An abbreviation for 'sensu lato', meaning 'in the broad sense', it is used to indicate that a taxon or concept is being considered in a wider, more inclusive manner, acknowledging variation beyond a narrow definition.

s.s.

Standing for 'sensu stricto' or 'in the strict sense', this abbreviation is employed to denote that a taxon or concept is being defined narrowly, excluding broader interpretations that might otherwise be considered.

vide

A Latin directive meaning 'see', which is used in scholarly and taxonomic works to refer the reader to additional sources or sections where further information or related discussion can be found.

Transcript

00:01 So first things first, it's good to know what d and l stand for.

00:05 So d stands for dextro rotary and l stands for lvo rotary.

00:26 So d and l designations are these designations are used to describe the direction molecules rotate light.

01:15 So the person who came up with this, i'm going to scroll down just a little bit.

01:19 His name was emil isher.

01:31 Now, what he did is he noticed that glyceraldahide spun polarized light into different directions.

01:43 So to emphasize the point that meal fisher worked with glycer aldehyde glyceraldahide to designate or to, let's do to assign d and l.

02:27 Okay.

02:28 Okay, so when he was doing this, he didn't have the tools or the equipment to make a proper designation.

02:40 So what he ended up doing was guessing.

02:45 So to backtrack a little bit, let me draw the structures of glyceralddehyde.

02:51 So the first structure of glyceraldohde is this one.

03:04 Okay, that's one.

03:05 The other structure of glyceralddehyde is this.

03:18 Okay, so we're a millfisher, and we're looking at our two molecules of glyceraltdehyde, and we don't have the tools to kind of properly designate which one is the and which one is out.

03:32 So what he did was he ended up guessing, but it turns out he was right.

03:38 So he designated this guy as, d glyceraldehyde and then the other one as l glyceralddehyde.

04:13 Okay, now if we go back to, if we scrolled up a little bit, what is the purpose of d and l is that these designations are used to describe the direction molecules rotate polarized light.

04:30 Okay? so now we know that this one over here rotates light a certain way and this one rotates light in a different way...

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