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Southern Black Widow (Latrodectus mactans)
Photo#230396
Copyright © 2008
jamessellers
unknown spider -
Latrodectus mactans
Kansas City, Missouri, USA
December 31, 1969
Contributed by
jamessellers
on 1 October, 2008 - 4:59pm
Last updated 25 February, 2014 - 10:20am
Moved
Moved from
Western Black Widow
.
…
Mandy Howe
, 25 February, 2014 - 10:20am
Moved
Moved from
Southern Black Widow
. Moved to
L. hesperus
based on comments
here
. Widowman noted that "
L. hesperus
markings are quite distinctive in this stage, just the outside edges of white are left, and these usually disappear with the final molt."
…
Mandy Howe
, 24 February, 2014 - 2:59pm
Not so fast!
Haha! Not all of these "ID" criteria are black and white (no pun intended based on the picture...).
Even though this spider displays very hesperus-like dorsal markings, it still falls squarely in the range of mactans, and displays very mactans-like leg banding. In a case like this, ideally I would want to see an hourglass shot, and even more ideally, I would love to see this spider in the other stages of it's development.
I would still feel decently comfortable putting this under mactans.
…
widowman10
, 24 February, 2014 - 3:12pm
Sorry!
Crap, sorry, I misinterpreted that to mean that you were IDing this one as
L. hesperus
? Confused, ha! I thought you made that comment in direct reference to this specimen.
I would still feel more comfortable omitting range from decisions with these or other
Latrodectus
, but I'll move this one back to
mactans
(sorry for all the moving James!), haha. As long as, even with range omitted from the decision, it still looks like
mactans
.
I've been on a personal mission with these lately, sorry for being so annoying, haha! I'm putting in for a specimen loan from the DMNS later, I'll probably also get some
Latrodectus
, just to see what I can learn from those that have been ID'd by genitalia. The patterns will be limited in preserved ones, but there's other stuff I can learn about them.
…
Mandy Howe
, 25 February, 2014 - 10:19am
Moved
Moved from
Widow Spiders
.
…
john and jane balaban
, 19 July, 2010 - 3:13pm
based on the not-so-bold dors
based on the not-so-bold dorsal markings, and location, i would say L. mactans.
also of note is the leg banding, not often seen in hesperus.
…
widowman10
, 19 July, 2010 - 10:18am
Moved
Moved from
Spiders
.
…
john and jane balaban
, 17 October, 2008 - 3:49pm
One of the Widows
in the genus Latrodectus
…
john and jane balaban
, 1 October, 2008 - 5:47pm
Maybe a Northern Black Widow?
Maybe a Northern Black Widow? I was told that between the white spots on the back of the abdomen, is crimson.
…
jamessellers
, 1 October, 2008 - 6:11pm
Immature.
Immature widows start out mostly white, believe it or not. As they age, most female individuals lose the bulk of their bold white and red markings. Males retain markings like this as adults, but this specimen appears to have not reached adulthood.
…
Eric R. Eaton
, 2 October, 2008 - 1:28am