Leuctra fusca (Linnaeus, 1758)

Judson, Sarah W. & Nelson, C. Riley, 2012, 3541, Zootaxa 3541, pp. 1-118 : 29-30

Leuctra fusca (Linnaeus, 1758)

SYNONYMY

Phryganea fusca Linnaeus, 1758

Perla cylindrical de Geer, 1778

Leuctra klapaleki Kempny, 1898

Leuctra fusciventris Stephens, 1836

Leuctra carpentieri Despax, 1945

Leuctra fusca Illies, 1955

TYPE LOCALITY: Sweden: Fahlun .

DIAGNOSIS: When preserved, the body of L. fusca is light brown with orangish tint ( Fig. 137). The male has paired sclerotized processes on the 6th and 7th abdominal tergites ( Fig. 138). The process on the 6th tergite has two parallel lobes that point caudally, whereas those on the 7th tergite are directed medially. Rather than a prominent epiproct, the male has multiple paraproct styles and other structures which appear as simple, thin rods at the tip of the abdomen ( Fig.138). The female subgenitial plate is trapezoid shaped with two posterior lobes that are clearly delineated from a broadly rounded shallow central lobe ( Fig. 139). The nymph has long palps, extending past the labium ( Fig. 131), as opposed to Paraleuctra zapekinae which has short palps not surpassing the labium ( Fig. 133).

DISTRIBUTION—Global: Trans-Palaearctic- Regional: AOB— Aimag: SE, TO*, UB*.

DISCUSSION: This species is common in Europe where much work has been done on its biology and ecology. The species was first documented in Mongolia by Joost (1970).