Leuctra maria Hanson, 1941

Grubbs, Scott A. & Wei, Summer, 2017, Morphological Systematics Of Leuctra Duplicata Claassen, 1923 Species Group (Plecoptera: Leuctridae), Illiesia 13 (5), pp. 59-69 : 63-65

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).

Figures

Figs. 27–32. Leuctra maria, 27-28, 30-32, West Virginia, Big Run Swamp; 29, Quebec, tributary to Lac Cromwell. 27, paraprocts, lateral view, 600X; 28, paraprocts, caudal view, 400X; 29, paraprocts, caudal view, 950X; 30, abdominal processes, dorsal view, 300X; 31, vesicle, ventral view, 500X; 32, subgenital plate, ventral view, 270X. sa = subanal lobe, sp = specillum.