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Information, insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Draft DARNER (ODONATA: AESHNIDAE) IDENTIFICATION

KEY TO GENERA

1a] Wing bases with definite dark spots ........................................ 2
1b] Wing bases clear, but may be tinted with amber ....................... 3

2a] Thorax with 2 lateral stripes ..........................Basiaeschna janata

2b] Thorax with 2 yellow spots .............................................Boyeria


3a] Thorax unmarked laterally ...................................................Anax

3b] Thorax with spots or stripes .......................................................... 4

4a] ........................................................................Mosaic Darners 5
4b] .......................................................................... other genera

5] MOSAIC DARNERS, GENUS: AESHNA

KEY TO SPECIES

5a] Fronto-clypeal suture on head, i.e. horizontal join about 1/3 down
on face, marked with black facial stripe ............................................6

For names of striped-faced species see HERE

5b] Suture without facial stripe, but suture may be visible as faint
brown line..............................................................................15

For names of species lacking facial strip see HERE

6a] Thoracic lateral stripes broken in middle...............Variable Darner


6b] Thoracic lateral stripes complete..............................................7

7a] Anterior thoracic lateral stripe (ALS) narrow with horizontal section at middle, and
backward pointing dorsal flag to make the ALS a zigzag stripe ........................8
7b] ALS broad or narrow but never with a horizontal section at middle ................9

8a] Either Zigzag Darner,

8b] or Azure Darner (not seen, see (1) for description and photo)

9a] Front edge of anterior lateral stripe (ALS) with indentation at middle, either shallow or deep notch ......... 10
9b] Front edge of ALS straight ...........13

10a] ALS offset in middle such that a wide concavity is visible on anterior edge,
top half of stripe narrows and ends in a forward projection;
PLS widens dorsally and extends into a ventrally pointing projection.
Large spots between ALS and PLS. Abdomen with large anterior and middle lateral spots
and no posterior lateral spots on A6...A10
Mottled Darner


10b] ALS not offset in middle; at most only a small spot between ALS and PLS .......11

11a] 2 broad thoracic lateral stripes.
Posterior lateral spots on abdomen large and connected to posterior dorsal spots ........ Lake Darner
female:

11b]Both ALS and PLS narrow ....................................... 12

12a] Shallow indentation on front edge of ALS, small indentation on front edge of PLS,
no dorsal flag ..................................................................................Variable Darner western form

©Cliff Bernzweig, see HERE for full image
12b] Front edges of ALS and PLS widely V-shaped, dorsal flag present; posterior lateral spots on abdominal segments
S4-S7 not connected to posterior dorsal lateral spots ..........................Subarctic Darner
male: female:


13a] Lateral stripes very broad ............................................ Persephone's Darner
no images in the Guide, see (1) for descriptioon and photo
13b] Lateral thoracic stripes narrow .....................................................14

14a] Thoracic stripes black-edged, white below shading to blue above .........................Walker's Darner

©J&J Balaban
14b] Thoracic stripes yellow below, green to blue above .......................................Paddle-Tailed Darner

©Scott Taylor, see HERE for full image.
__________________________________________________________________________________________________________________
___________________________________________________________________________________________________________________
WORK IN PROGRESS

15] NO FACIAL STRIPE

15a] Styli of ovipositor as long as, or longer than, dorsum of last abdominal segment (A10),
S10 without pale spots ................................................................................ [16]
15b] Styli shorter than A10, A10 usually with pale spots ...........................................[17]
...
16a] Anterior lateral spots on abdominal segments A4..A7 small, tear-shaped;
thoracic stripes narrow, parallel sided without dorsal flags
.........................................................................................Black-Tipped Darner
16b] Anterior lateral spots on A4...A7 large and oblong; thoracic stripes broads,
anterior surface of anterior lateral stripe with midway indentation and backward-pointing flag,
posterior lateral stripe widens dorsally
........................................................................................Lance-Tipped Darner

BLACK-TIPPED................LANCE-TIPPED
......

BLACK-TIPPED..................LANCE-TIPPED
........................
LANCE-TIPPED



.....[





THORACES

MOSAIC DARNERS

SHADOW..........[
.........[






GREEN-STRIPED.....CANADA
............

FEMALES
ABDOMENS

MOSAIC DARNERS

BLACK-TIPPED


SHADOW





GREEN-STRIPED.......CANADA




MALES WORK IN PROGRESS
Green Darners - unmarked green thorax diagnostic (Fig 1, m)
Springtime Darner - the 2 lateral stripes + the dark spots
at wing bases are diagnostic (Fig 2, m)
Spotted Darners - the 2 yellow spots are diagnostic (Fig 3, m)
Pygmy Darners - complex pattern + pigmented wing bases (Fig 4)

MOSAIC DARNERS
...Canada Darner - ALS widely notched, flag from dorsal tip;
PLS same angle as ALS (Fig 5, m) (cf. Lake Darner Fig 6)
...Lake Darner (Fig 6)
...Variable Darner - both ALS and PLS completely interrupted
(Fig 7, m)
...Zigzag Darner - ALS zigzag, PLS narrow and concave (Fig 8, m)
...Walker's Darner - thorax brown, ALS & PLS blue,
edges of PLS nearly parallel (Fig 9)
...Mottled Darner - ALS wide and offset, dorsally with anterior
pointing projection; PLS wide with downward pointing projection.
Large blotches between ALS and PLS (Fig 11 m)


4
5 67 8
911

Thanks To:
Troy Bartlett for BugGuide
John & Jane Balaban; Cliff Bernsweig; Scott Taylor

To be completed?
Will this be completed? It looks like the start of a valuable tool, but it is incomplete. Maybe it has been superseded by another guide. Please advise us on its status.

 
table around
I started a table at one point that was moderately complete at one point. See here (scroll up a couple posts). I'll try to pick it up again at some point, hopefully there's a few more pieces to fill in since then.

 
Not likely to be completed
Tony left BugGuide a few years ago and deleted his account.

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