Isoperla roguensis Szczytko &amp; Stewart 1984
Creators: name: Sandberg, John B.
name: Kondratieff, Boris C.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlodidae
Isoperla
Isoperla roguensis

description: <i>Isoperla roguensis</i> Szczytko &amp; Stewart (Figs. 14 a-d, 20 e) <i>Isoperla roguensis</i> Szczytko &amp; Stewart 1984. Holotype &amp;male;, Oregon, Curry County, mouth of Rogue River. <i>Isoperla karuk</i> Baumann &amp; Lee 2009. Holotype &amp;male;, California, Humboldt County, Klamath River @ junction of Aikens Creek. Syn. Sandberg, 2011b. <b>Male</b>. Aedeagus: sclerotized posterior process present; body of aedeagus with one posterior lobe, one large dorsal lobe, and one anterior lobe (Fig. 14a); one bulbous and usually bi-hemispherical shaped patch of spinulae above sclerotized process and a small pair of spinule patches placed laterally (Figs. 14 a-c); sclerotized process length approaching 0.5 mm, blade-like in lateral view (Fig. 14a), distal margin expanded and slightly membranous in posterior view (Fig. 14b), shape of distal expanded margin variable, and narrow proximal portion of sclerotized process usually inverted inside posterior aedeagal membrane. Abdominal terga 8-9, 9, 9-10: without stout spinulae or long stout setae. Posterolateral margins of at least abdominal segment 8 with scale-like setae clustered in brushes of several setae. Paraprocts: curved dorsally, length if straightened subequal to combined first and second cercal segments, tapering abruptly to tiny sharp apices (Fig. 14c). Vesicle: rounded lobe, widest at base with broadly rounded apical margin (Fig. 14d). <i>Isoperla roguensis</i> shares similar characters with the species of the <i>I. marmorata</i> complex (Table 1). See comments under <i>I. fulva</i>. Three distinct spinule patches distinguishes this species. Recently, Sandberg (2011b) placed <i>I. karuk</i> Baumann &amp; Lee 2009 as a junior subjective synonym. The previously described everted anterior tubelike lobes (Szczytko &amp; Stewart 1984, fig. 55) remained inverted after live eversion, their positions indicated by a pair of small inverted areas of membrane (openings). After clearing in KOH, the internal tubelike processes were visible with openings along anteroapical margin (Fig. 20e, ventral aspect provided clearest view). <b>Additional Material Examined.</b> CALIFORNIA, Plumas Co., MF Feather River, FR 12N61X access off Hwy 70, 10.5 mi (16.9 km) SE Quincy, 39.86453°N, 120.76138°W, 18/ VI /2013, J.L. York, 1&amp;male;, 1&amp;female; (JBSC); Jamison Creek, 1.6 mi (2.6 km) E Two Rivers exit off Hwy 70, 39.813°N, 120.6821°W, 19/ VI /2013, J.L. York, 1&amp;female; (JBSC).
description: Published as part of <i>Sandberg, John B. &amp; Kondratieff, Boris C., 2013, The Isoperla Of California (Plecoptera: Perlodidae); Updated Male Descriptions And Adult Keys For 18 Western Nearctic Species, pp. 34-64 in Illiesia 9 (5)</i> on page 55, DOI: 10.5281/zenodo.4760870
description: {"references": ["Szczytko, S. W. &amp; K. W. Stewart. 1984. Descriptions of Calliperla Banks, Rickera Jewett, and two new western Nearctic Isoperla species (Plecoptera: Perlodidae). Annals of the Entomological Society of America, 77: 251 - 263.", "Baumann, R. W. &amp; J. J. Lee. 2009. Two interesting new species of Isoperla from northern California (Plecoptera: Perlodidae). Illiesia, 5: 1 - 10.", "Sandberg, J. B. 2011 b. The Isoperla of California (Plecoptera: Perlodidae); larval descriptions and a key to 17 western Nearctic species. Illiesia, 7: 202 - 258."]}