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Ephemeroptera: Baetidae of Gunnison County, Colorado

Plauditus virilis
Tiny Blue-Winged Olive, Small Minnow Mayfly

(McDunnough) 1923
Updated 21 Nov 2018

TSN 568611


Another of the small minow mayflies. Lacks hindwings and is only two-tailed, compare to Acentrella. Baetis bicaudatus is also two-tailed, but has hind wings. Previously in the genus Baetis.

Locations Collected

Tomichi Creek


Name recently changed from Baetis virile to Plauditus virilis. Read Lugo-Ortiz and McCafferty's 1997 paper.

Good Links

On this website:
Plauditus punctiventris
Acentrella insignificans
Baetis bicaudatus

Other websites:
Photos, Map, Museum, DNA - Barcodinglife.org


Durfee,RS; Kondratieff,BC 1994 New additions to the inventory of Colorado mayflies (Ephemeroptera). Entomological News 105 4, 222-227.
    This paper reports Baetis virile from Tomichi Creek near Gunnison.
The authors discuss this species as Baetis virile. Abstract: " Four mayfly species, Beatis dardanus, Paracloedes minutes, Homoeoneuria alleni, and Rhithrogenia pellucida are reported from Colorado for the first time. Homoeoneuria and Paracloedes represent new generic records for the state. The male terminalia of R. pellicuda from Colorado and a paratype from Minnesota are illustrated and compared, and characters are given to separate this species from the four other Rhithrogena species in Colorado. Previous tentative records for two additional species, Baetis virile and Leptophlebia nebulosa are confirmed. Biogeographic affinities for several species in the North Platte River system are discussed. A total of 43 genera and 101 species of mayflies are now known from Colorado.

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
     Describes the new genus Plauditus and renames Baetis virilis as Plauditus virilis.

McCafferty,WP 1997 Name adjustments and a new synonym for North American Ephemeroptera species. Entomological News 108 (4) 318-320. PDF
     Changes the species name from Baetis virile to Baetis virilis. The name Baetis is considered masculine and therefore the species name needed to match that.

McCafferty,WP; Durfee,RS; Kondratieff,BC 1993 Colorado mayflies (Ephemeroptera): an annotated inventory. Southwestern Naturalist 38 3, 252-274. PDF
     They discuss this species as Baetis virile. Quote from page 256: "This report provides a considerable westward extension of the known range of this species, which is known from Quebec and Ontario and has not been generally reported in the literature since its description. While similar to Acentrella in that it lacks hingwings and has only two tails as a larvae, it is otherwise distinct. The single specimen at CSU agrees with the larval key description of Traver (1935). There remains, however, some possibility that it is either a color variant of B. punctiventris or that it is an undescribed species (see remarks under B. bicaudatus. "

McDunnough,J 1923 New Canadian Ephemeridae with notes. Canadian Entomologist 55:39-50.
     Described as Cloeon virilis.

McDunnough,J 1924 New Canadian Ephemeridae with notes, II. Canadian Entomologist 56, 90-98, 113-122, 128-133.
     A more thorough description as Pseudocloeon virilis on page 115.

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