Acentrella turbida (Ephemeroptera) of Gunnison County, Colorado

Ephemeroptera: Baetidae of Gunnison County, Colorado

Acentrella turbida

(McDunnough) 1924

Updated 1 July 2009
TSN 568574

Notes

Adults were identified from sticky trap samples above the East River near the Rocky Mountain Biological Lab. Larvae have been found in Coal Creek, East River and West Brush Creek so far. Notice the barely visible fringe of setae on the legs of the animal to the right. That feature, a lack of a "thumb" on the labial palp, two tails and a lack of hind wing pads distinguishes A. turbida from the other Baetidae in the county. Black wing pad nymphs were common in streams in the northern Gunnison Basin in September and October of 2008.

Links

On this website:
Introduction to Acentrella
Key to Baetidae Nymphs

Other websites:
Map - Kondratieff, Boris C. (coordinator). 2000. Mayflies of the United States. Jamestown, ND: Northern Prairie Wildlife Research Center Online. (Version 12DEC2003). http://www.npwrc.usgs.gov/resource/distr/insects/mfly/usa/35.htm

References

Banks, N. 1924 Descriptions of new neuropteroid insects. Bulletin of the Museum of Comparative Zoology. 65(12):419-455, pl. 1-4.
     Banks described several species that were later combined into Acentrella turbida. They were: Acentrella carolina, Cloeon carolina and Pseudocloeon carolina.

Lugo-Ortiz,CR; McCafferty,WP 1998 A new North American genus of Baetidae (Ephemeroptera) and key to Baetis complex genera. Entomological News 109 5, 345-353. Abstract
     Paeg 351 has illustrations of the labium and right foreleg. The labal palp lacks a thumb (Baetis have the thumb) and the foreleg has a row of long fine setae.

McCafferty,WP and Provonsha, AV The Mayflies of North America Species List http://www.entm.purdue.edu/entomology/research/mayfly/species.html (Version 12Jan2009)
     Here is the geographic range and synonyms:

Acentrella turbida (McDunnough), 1924 [CAN:NE,NW;USA:FN,NE,NW,SE,SW]
    * Acentrella carolina (Banks), 1924 (syn.)
    * Cloeon carolina Banks, 1924 (syn.)
    * Pseudocloeon carolina (Banks), 1924 (syn.)
    * Pseudocloeon turbidum McDunnough, 1924 (orig.)

McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274.
Quote from page 254: "This species was previously reported from Alberta and Utah (as Pseudocloeon turbidum. The first author has recently seen material from British Columbia also. The larvae of this species has not been formally described, but will be described from the British Columbia material by McCafferty and Wigle. Adults and larvae of A. carolina (Banks) can be easily confused with this species, and any Acentrella larvae that appear to be A. carolina in Colorado are most likely A. turbida. "

McCafferty,WP; Wigle,MJ; Waltz,RD 1994 Systematics and biology of Acentrella turbida (McDunnough) (Ephemeroptera: Baetidae). Pan-Pacific Entomologist 70, 301-308.

McDunnough,J 1924 New Canadian Ephemeridae with notes, II. Canadian Entomologist 56, 90-98, 113-122, 128-133.
Described as Pseudocloeon turbidum.

Waltz RD; McCafferty WP. 1987. Systematics of Pseudocloeon, Acentrella, Baetiella, and Liebebiella, new genus (Ephemeroptera: Baetidae). Journal of the New York Entomological Society 95:553-568.

The United States Geological Survey (USGS) National Water Quality Assessment Data Warehouse (NAWQA) shows this species is present in Gunnison County. Data as of 1Sep2005

Brown, Wendy S. 2004 Mayflies (Ephemeroptera) of Gunnison County, Colorado, USA
www.gunnisoninsects.org