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Ephemeroptera: Ameletidae of Gunnison County, Colorado

Introduction to Ameletus
Brown Duns, Dark Brown Spinner, Ameletid Minnow Mayflies

Eaton, 1885
Updated 22 Jan 2019
TSN 100996

Provisional Ameletus Species List

Ameletus similior
Ameletus sparsatus
Ameletus validus
Ameletus velox
Probably more present

Good Links

North American Ameletus list - from Mayfly Central http://www.entm.purdue.edu/mayfly/na-species-list.php#FamilyAmeletidae

PAN Pesticides database: http://www.pesticideinfo.org/List_AquireAll.jsp?Species=6024∓Effect=


Allan,JD 1978 Diet of brook trout (Salvelinus fontinalis Mitchell) and Brown Trout (Salmo trutta L.) in an alpine stream. Internationale Vereinigung für Theoretische und Angewandte Limnologie Verhandlungen 20, 2045-2050.

Allen,RK and Chao,ESM 1981 Mayflies of the Southwest: new records and notes of Siphlonuridae (Ephemeroptera: Baetidae). Pan-Pacific Entomologist (57) 449-456. PDF

Argyle,DW; Edmunds,GF 1962 Mayflies (Ephemeroptera) of the Curecanti Reservoir Basins Gunnison River, Colorado. University of Utah Anthropological Papers 59(8) 178-189.
     Quote from page 181 regarding Ameletus spp.: There are at least 4 and probably 5 species represented by these collections. Until they are successfully reared, they cannot be identified. They were collected from riffle areas or quiet water by a riffle. They were often found closer to the bank than the center of the stream. They were found at only one station in the Gunnison River. Subsequent collections in the spring of 1962 indicate that they are well distributed in the main river."

Buchwalter,DB and Luoma,SN 2005 Differences in dissolved cadmium and zinc uptake among stream insects: mechanistic explanations. Environmental Science and Technology (39) 498-504.

Clemens,WA 1922 A parthenogenetic mayfly (Ameletus ludens Needham). Canadian Entomologist (54)77-78.

Dodds,GS 1923 Mayflies from Colorado: descriptions of certain species and notes on others. Transactions of American Entomological Society 69, 93-116. PDF

Dodds,GS and Hisaw,FL 1925. Ecological studies on aquatic insects. IV. Altitudinal range and zonation of mayflies, stoneflies and caddisflies in the Colorado Rockies. Ecology 6(4)380-390. Abstract PDF

Eaton AE. 1883-1888. A revisional monograph of recent Ephemeridae or mayflies. Transactions of the Linnean Society of London, Second Series, Zoology 3:1-352, 65 pl.
     The Reverend described the genus Ameletus for the first time along with many other mayfly genera and species. The genus name means neglected or overlooked.

[I looked for the illustrations, but they appear to be mislabeled or non-existent, I'll try again when I have time.]

Gill,BA; Harrington,RA; Kondratieff,BC; Zamudio,KR; Poff, LN andFunk,CW 2014 Morphological taxonomy, DNA barcoding, and species diversity in southern Rocky Mountain headwater streams. Freshwater Science, 33(1), 288-301. PDF
      The authors found three potential cryptic species of Ameletus in streams located on the Front Range of Colorado, but had insufficent genetic data to make any strong conclusions.

Gilpin,BR and Brusven,MA 1970 Food habits and ecology of mayflies of the St. Maries River in Idaho. Melanderia 4:19-40. PDF

NAWQA National Water-Quality Assessment database said this genus was found in their samples from Gunnison County. Searched 1Sept2005.

Pennack,RW and Ward,JV 1986 Interstital faunal communities of the hyporheic and adjacent groundwater biotopes of a Colorado mountain stream. Archiv für Hydrobiologie Suppl. 74 3, 356-396.
     They found Ameletus sp. nymphs in the hyporheic zone of the South Platte river in the Front Range of Colorado at 1863 meters elevation.

Poff,NL; Olden,JD; Viera,NKM; Finn,DS; Simmons,MP; Kondratieff,BC 2006 Functional trait niches of American lotic insects: traits-based ecological applications in light of phylogenetic relationships. Journal of the North American Benthological Society 25 4, 730-755.
     Here are the traits for this genus from the Appendix:
Life History Voltinism Univoltine - 1 generation/year
Development Fast Seasonal
Synchronization of emergence Well synchronized (day)
Adult life span Less than 1 month
Adult ability to exit Absent
Ability to survive dessication Absent
Mobility Female dispersal Less than 1km flight before laying eggs
Adult flying strength Weak - cannot fly into light breeze
Occurance in drift Rare (catastrophic only)
Maximum crawling rate High - faster than 100 cm/hour
Swimming ability Strong
Morphology Attachment None (free ranging)
Armoring None: soft - bodied
Shape Streamlined: fusiform
Respiration Gills
Size at maturity Small (less than 9mm)
Ecology Rheophily Depositonal and erosional
Thermal preference Cold stenothermal or Cool eurythermal
Habit Swim
Trophic habit Collector-gatherer

Short,RA; Canton,SP and Ward,JV 1980 Detrital processing and associated macroinvertebrates in a Colorado mountain stream. Ecology, 61(4), 727-732. PDF
     Ameletus nymphs were found in alder leaf packs, however were not present in willow, aspen or pine leaf packs.

Stanford,JA and Gaufin,AR 1974 Hyporheic communities of two Montana rivers. Science 185:700-702. PDF
     The authors report Ameletus nymphs from the hyporheic zone of the Flathead River in Montana, USA.

Zloty,J 1996 A revision of nearctic Ameletus mayflies based on adult males, with descriptions of seven new species (Ephemeroptera: Ameletidae). Canadian Entomologist 128, 293-346. PDF

Brown,WS 2004 Mayflies (Ephemeroptera) of Gunnison County, Colorado, USA

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