Leuctra maria Hanson, 1941

Northeastern Needlefly

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org: TaxonName:462458

(Figs. 27–32, 34)

Leuctra maria Hanson 1941:175 .

Holotype ♂ (USNM), Barrington (Stratford Co.), New Hampshire

Leuctra maria Ricker, 1952:169 . (correct description of female)

Leuctra maria Illies, 1966:98 .

Leuctra maria Zwick, 1973:403 .

Leuctra maria Hitchcock, 1974:77 .

Male. The dorsal abdominal process of the 8 th abdominal tergum emanates anteriorly, extending ca. ½ length of the segment and terminates on the posterior margin as a raised, bilobed process with small, distally rounded lobes (Fig. 30); the distance between the lobes is consistently ca. equal to lobe width (Fig. 30). The 7 th abdominal tergum lacks dorsal processes, bearing only a thin, unraised sclerotized band anteriorly. The specilla are very broad basally and medially in lateral view, tapering distally to an acute apex (Fig. 27); the dorsal margin is essentially straight (Fig. 27); in caudal view the specilla bear prominent troughs from near the base to the tips, giving a distinct concave appearance (Figs. 28–29); the medial margin of the trough has low, tooth-like tubercles present along the distal ⅓ (Figs. 28–29). The subanal lobes are broadest basally, slightly recurved anteriorly in distal ½, and subequal in length to the specilla (Figs. 27–28). The vesicle base is short, body expanded medially and ovoid in shape, and entire surface covered in long, socketed bristles (Fig. 31).

Female. The 8 th abdominal sternum bears a broadlyrounded medial tubercle on the anterior ½ that occupies the medial ca. ½ of the segment (Fig. 32). The subgenital plate terminates in large, broadly rounded or subtriangular lobes separated by a vshaped notch (Fig. 32).

Distribution. Canada: ON, PQ. USA: CT, ME, NH, NY, PA, VT, WV (DeWalt et al. 2017).