Blue-winged Olives
Baetis
Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.
Stonefly Species Moselia infuscata (Tiny Winter Blacks)
Species Range
Identification
Species ID from GBIFthe Global Biodiversity Information Facility
Source: The Banded-Wing Moselia (Plecoptera: Leuctridae) Revisited
Diagnosis. This species lacks the pale wing bands found in most Moselia zonata and males have longer and narrower paraprocts than other Moselia. Females of the two species overlap in subgenital plate structure and cannot be reliably distinguished without the pale wing band character.
Physical description
Most physical descriptions on Troutnut are direct or slightly edited quotes from the original scientific sources describing or updating the species, although there may be errors in copying them to this website. Such descriptions aren't always definitive, because species often turn out to be more variable than the original describers observed. In some cases, only a single specimen was described! However, they are useful starting points.
Description from GBIFthe Global Biodiversity Information Facility
Source: The Banded-Wing Moselia (Plecoptera: Leuctridae) Revisited
(Figs. 1, 41, 43 - 52) http: // lsid. speciesfile. org / urn: lsid: Plecoptera. speciesfile. org: TaxonName: 4315Source: The Banded-Wing Moselia (Plecoptera: Leuctridae) Revisited
Adult habitus. Male forewing length 6.0 - 6.5 mm (n = 16), female 6.5 - 7.0 mm (n = 8). General body color dark brown, head brown on occiput and frons, but with a pale transverse band extending between compound eyes behind ocelli. Pronotum mostly pale brown, but with sutures dark brown, and with a large brown rugose area on either side of median suture (Fig. 43). Wings brown with conspicuous pale humeral and stigmatic markings, but subapical transverse pale band absent (Fig. 1). Tibiae almost entirely dark brown and without bands.
Male genitalia (n = 35). Typical of the genus but paraprocts long and slender with fin poorly developed and mostly sclerotized (Figs. 41, 44, 46 - 51). Paraproct body extending from base to fin apex 425 - 475 µm in length; greatest paraproct height across fin apex 94 - 125 µm. The apical digit on the paraprocts ranges from 138 - 154 µm in length.
Female subgenital plate (n = 2). Median lobe small, parabolic and poorly sclerotized. Large, heavily sclerotized lateral lobes triangular and broadly joined to posterolateral area of sternum 8 forming a continuous sclerotized margin. Median field of plate unsclerotized along a longitudinal stripe. Sternum 9 unsclerotized in a small area posterior to projecting subgenital plate (Fig. 45).
Egg. Unknown.
Larva. Described by Ricker (1943) and Stewart & Stark (1988, 2002).
Start a Discussion of Moselia infuscata
Stonefly Species Moselia infuscata (Tiny Winter Blacks)
Species Range
Common Names
Resources
- NatureServe
- Integrated Taxonomic Information System
- Global Biodiversity Information Facility
- Described by Claassen, P.W. (1923) New species of North American Plecoptera. The Canadian Entomologist 55, 257–263, 281–292.