Alloperla imbecilla
Creators: name: Willett, Michele R.
name: Stark, Bill P.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Chloroperlidae
Alloperla
Alloperla imbecilla

description: <i>Alloperla imbecilla</i> (Say) (Figs. 61-66) <i>Sialis imbecilla</i> Say, 1823:165. Type lost, Ohio River, Cincinnati, Ohio <i>Alloperla imbecilla</i>: Baumann, 1974:258. Neotype &amp;male; (United States National Museum), Vastine Run, Lower Twin Creek, Adams Co., Ohio <i>Alloperla imbecilla</i>: Surdick, 2004:17. Redescription and distribution update <b>Material examined.</b> VA: Scott Co., Devils Fork, FR 619, 17 May 1997, B. Stark, 8 &amp;male;, 8 &amp;female; (BPS). Same site, 19 May 2009, B. Stark, 10 &amp;male;, 6 &amp;female; (BPS). Scott Co., Big Stony Creek, FR 657, 19 May 2009, B. Stark, 1 &amp;male; (BPS). <b>Epiproct.</b> Length from base to tip, ca. 266-275 μm. Greatest width beyond base, ca. 39-46 μm. Greatest apical thickness, ca. 43 μm. Epiproct cowl without enlarged lobes (Figs. 61-62, 66); densely setose over most of cowl surface but bare near base of epiproct. Epiproct widest at base (ca. 61 μm) and on subapical cap (ca. 39 μm), but similar in width through most of length (Fig. 62). Most of dorsum covered with a closely appressed, densely setose mat (Figs. 62-63, 66), but small basolateral and apical areas, and entire ventral surface bare; apex with a distinctive ventral row of long setae (Figs. 63-65) and a median longitudinal patch of additional setae extends onto spiny process laterally or basolaterally (Fig. 63); apex bearing a slightly thickened, multispined process (Figs. 63-64). <b>Remarks.</b> The specimens examined in this study represent the southern most population known for this species, and they exhibit subtle variations from the figures presented by Surdick (2004) and Baumann (1974). A comparative SEM study is needed for several populations to evaluate the extent of variation in the shape, setation and number of serrae for the apical spiny portion of the epiproct.
description: Published as part of <i>Willett, Michele R. &amp; Stark, Bill P., 2009, The Alloperla Leonarda Group Of Eastern North America, With Sem Images Of Four Out-Group Species (Plecoptera: Chloroperlidae), pp. 108-127 in Illiesia 5 (11)</i> on page 123, DOI: 10.5281/zenodo.4759290
description: {"references": ["Say, T. 1823. Description of insects belonging to the order Neuroptera Lin., Latr. collected by the expedition authorized by J. C. Calhoun, Secretary of War, under the command of Major S. H. Long. Western Quarterly Reporter, 2: 160 - 165, (reprinted 1883, pp. 170 - 175).", "Baumann, R. W. 1974. What is Alloperla imbecilla (Say)? Designation of a neotype, and a new Alloperla from eastern North America (Plecoptera: Chloroperlidae). Proceedings of the Biological Society of Washington, 87: 257 - 264.", "Surdick, R. F. 2004. Chloroperlidae (The Sallflies). Pp. 1 - 60 in. B. P. Stark &amp; B. J. Armitage (eds.). Stoneflies (Plecoptera) of eastern North America. Volume II. Chloroperlidae, Perlidae, and Perlodidae (Perlodinae). Bulletin of the Ohio Biological Survey, New Series, Volume 14. Ohio Biological Survey, Columbus. 192 pp."]}