[Nhcoll-l] Sleeves for Lepidopterans

Mon Jul 5 08:11:12 EDT 2021

Hi all,

Chris Grinter beat me to it ;). Naturalis has started storing Lepidoptera
in glassine envelopes for the past few years just as we have done with
Odonata in the past decades, because it is so advantageous. The envelopes
are relatively cheap, easy to handle, not static and can "breathe" if
specimens are not absolutely dry. The only disadvantage is that it is only
semi-transparant. The material we use is of archival quality, produced by
Lindner and supplied by De Man - Werkendam, Netherlands. I can dig a bit
deeper for the specifications of the material if anyone is interested, let
me know. I suspect the crumbling envelopes must be old ones, it is quite
easy these days to find good archival quality and affordable glassine
envelopes.
The plastic that Douglas Yanega is referring to might be *mylar*, which has
also been used in our Odonata collection. This is very expensive, somewhat
static, does not breathe, but has the advantage that the specimens can be
studied without removing them from the envelopes. We still have some
supply available but I primarily use glassine for the Odonates. In any
case, the specimens can always be easily accessed from these envelopes when
they need to be relaxed and/or mounted.

Hope this helps
Max Caspers

On Fri, 2 Jul 2021 at 14:00, Menard, Katrina <katrina.menard at uconn.edu>
wrote:

> Thank you everyone for you input and suggestions!
>
> We likely will go the route of custom sleeves with ziplock tops like the
> Royal British Columbia Museum’s manuscript on Odonate storage (
> https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.researchgate.net%2Fpublication%2F330816327_An_Efficient_Storage_System_for_Adult_Odonata_Specimens_With_Application_for_Other_Museum_Collections&data=04%7C01%7C%7Cacb00fb16f59440f2f3b08d93cfac085%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C637607869936453874%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=dcAjdKhDe4yTP8rQkoxEJeR0HGsdDllTaDYOjBzav0o%3D&reserved=0
> <https://nam10.safelinks.protection.outlook.com/?url=https://www.researchgate.net/publication/330816327_An_Efficient_Storage_System_for_Adult_Odonata_Specimens_With_Application_for_Other_Museum_Collections&data=04%7C01%7C%7Cacb00fb16f59440f2f3b08d93cfac085%7C17f1a87e2a254eaab9df9d439034b080%7C0%7C0%7C637607869936453874%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0=%7C1000&sdata=dcAjdKhDe4yTP8rQkoxEJeR0HGsdDllTaDYOjBzav0o=&reserved=0>)
> since it gives the option of accessing the specimen to spread them if need
> be. If not, it was very helpful to see what and how other people are using
> as solutions to paper sleeves.
>
> Thanks again,
>
> Katrina
>
> ------------------------------------------------------------------------------
> Dr. Katrina Menard
> Collection Manager, Invertebrates
> Ecology & Evolutionary Biology
> University of Connecticut
> Unit 3043, 75 N. Eagleville Rd.
> Storrs, CT 06269-3043
> email: katrina.menard at uconn.edu <katrina.menard at uconn.edu>
>
> Zootaxa Section Editor: Miroidea
>
> On Jul 1, 2021, at 5:55 PM, Chris Grinter <cgrinter at calacademy.org> wrote:
>
>
> *Message sent from a system outside of UConn.*
>
>
> This paper discusses the storage technique, but I agree with Doug—much of
> the glassine I've seen used in collections is not archival. I've picked up
> envelopes and had them crumble, or they are yellowed and have wicked oils
> from specimens. I think applying Odonata standards (clear poly bagging) is
> superior.
>
> Chris
>
> *Christopher C. Grinter*
> Collection Manager of Entomology
> President, Entomological Collections Network
> Assistant Secretary & Asst. Treasurer, The Lepidopterists’ Society
> California Academy of Sciences
> T 415.379.5320
> cgrinter at calacademy.org <YourEmail at calacademy.org>
>
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> On Thu, Jul 1, 2021 at 5:26 PM Douglas Yanega <dyanega at gmail.com> wrote:
>
>> On 7/1/21 1:04 PM, Menard, Katrina wrote:
>> > Hi all,
>> >
>> > I was curious whether there are collections out there that store
>> > sleeved lepidopteran material (like Odonata). We have a large amount
>> > of butterflies that are stored in paper and glassine envelopes that
>> > would take several lifetimes to spread, and we neither have the time
>> > nor space to go that route. We like the idea of glassine sleeves as a
>> > more permanent and protective way to store our enveloped material, but
>> > wanted more input from the community on this.
>> >
>> We have plenty of odonates in glassines in our collection, but these
>> appear to be some sort of plastic, and are therefore very different from
>> the glassines used for leps. I suspect there may be issues surrounding
>> the archival properties of the latter, especially since paper may be
>> acidic. We do have some very old papered leps (in both plain paper and
>> glassines), and I see signs that there may be chemical interactions
>> taking place; if you dump a lep out of a very old glassine, there is
>> often a visible "stain" where the specimen was, and it's not just the
>> body. These old glassines are also distinctly yellowed. It's reason to
>> be suspicious, at least.
>>
>> Peace,
>>
>> --
>> Doug Yanega      Dept. of Entomology       Entomology Research Museum
>> Univ. of California, Riverside, CA 92521-0314     skype: dyanega
>> phone: (951) 827-4315 (disclaimer: opinions are mine, not UCR's)
>>
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-- 
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