Hex Mayflies
Hexagenia limbata
The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Featured on the forum
This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and
fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or
support the project for an enhanced experience here.
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/urls.fnc on line 81
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/urls.fnc on line 82
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/urls.fnc on line 83
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/commoncontent.fnc on line 837
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/commoncontent.fnc on line 838
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/commoncontent.fnc on line 839
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/urls.fnc on line 81
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/urls.fnc on line 82
Warning: Trying to access array offset on value of type null in /home/jasonn5/func/urls.fnc on line 83
Database Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
Generated by query:
SELECT COUNT(imageid) FROM im_other WHERE shown_trout=0 && shown_fish=0 && private=0 && locationid=Backtrace:
__construct <— __construct <— getTopic <— initPageObjects
Database Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
Generated by query:
SELECT COUNT(imageid) FROM im_uwphoto WHERE shown_trout=0 && locationid=Backtrace:
__construct <— __construct <— getTopic <— initPageObjects
Database Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
Generated by query:
SELECT COUNT(imageid) FROM im_extax WHERE locationid=Backtrace:
__construct <— __construct <— getTopic <— initPageObjects
Database Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
Generated by query:
SELECT COUNT(specimenid) FROM specimens WHERE locationid=Backtrace:
__construct <— __construct <— getTopic <— initPageObjects
Database Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ORDER BY s.author_is_troutnut DESC, s.quality_tier DESC, s.stat_bestimage DESC #' at line 18
Generated by query:
SELECT DISTINCT t.parentid AS parenttaxonid,
t.parentname AS parenttaxonname,
t.name AS taxonname,
t.level AS taxonlevel,
t.taxonid,
s.*,
i.*,
s.water AS location,
l.secret AS locationSecret,
l.name AS locationName,
l.state AS locationState
FROM rel_taxa_specimens r
INNER JOIN specimens s ON s.specimenid = r.specimenid
LEFT JOIN im_regspec i ON s.stat_bestimage = i.imageid
INNER JOIN taxa t ON t.taxonid = s.belongs_to
LEFT JOIN locations l ON l.id = s.locationid
WHERE s.locationid =
ORDER BY s.author_is_troutnut DESC, s.quality_tier DESC, s.stat_bestimage DESC # assume newer images are better
LIMIT 0, 12Backtrace:
__construct <— __construct <— getTopic <— initPageObjects
Database Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
Generated by query:
SELECT COUNT(videoid) FROM videos WHERE locationid=Backtrace:
__construct <— __construct <— getTopic <— initPageObjects
Error: Problem with location id=.
getPreFullHTML <— getFullHTML <— printPageBody <— cc_printPageFromTemplate
getPreFullHTML <— getFullHTML <— printPageBody <— cc_printPageFromTemplate
Error: Problem with location id=169.
array_map <— {closure} <— getMixedPostsHTML <— getRelatedTopicsHTML <— getFullHTML <— printPageBody <— cc_printPageFromTemplate
array_map <— {closure} <— getMixedPostsHTML <— getRelatedTopicsHTML <— getFullHTML <— printPageBody <— cc_printPageFromTemplate
This discussion is about .
GldstrmSam on Jul 14, 2012July 14th, 2012, 10:56 pm EDT
Beautiful photos Jason!
If it hadn't been for the title and for the photo at the bottom I would have never guessed that those were taken there. What I see of the creek from the road does not nearly do it justice.
Samuel
If it hadn't been for the title and for the photo at the bottom I would have never guessed that those were taken there. What I see of the creek from the road does not nearly do it justice.
Samuel
There is no greater fan of fly fishing than the worm. ~Patrick F. McManus
Quick Reply
Related Discussions
Topic
Replies
Last Reply
3
Jun 17, 2017
by JohnR
by JohnR
10
Aug 25, 2010
by Oldredbarn
by Oldredbarn
0
Dec 13, 2010
by Hjkass
by Hjkass