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Photo#1110205
Southern Oregon Fishfly - Orohermes crepusculus

Southern Oregon Fishfly - Orohermes crepusculus
Chinquapin Group Campground, 12 miles east of Cave Junction, western Siskiyou Mountains, Josephine County, Oregon, USA
July 7, 2015
Size: Approx. 5-6 cm
[For full-size image, click here...then click the resulting image in your browser window once more.]

The collage above consists of:
    1) a rotated crop of the forewing from the 3rd image in this series in the middle of the collage;
    2) the forewing venation diagram for Dysmicohermes ingens at top of the collage; and
    3) the forewing venation diagram for Orohermes (=Dysmicohermes) crepusculus at bottom of the collage.

The two line drawing diagrams are both taken from pg. 109 of Chandler (1954). Note the wider costal band (somewhat flaring in proximal half) in both my photo and the O. crepusculus diagram.

The colored arrows point to agreements and discrepancies between my photo and one or the other of the two other wing diagrams. In particular, the green arrow points to what I think is either an error in the diagram for O. crepusculus or a crossvein that can sometimes be absent...since I do not see the indicated crossvein in various images of O. crepusculus on the web.

At any rate, note the labels in the top diagram refer to veins rather than the cells. Thus the cell A1 lies beneath (the basal(!) portion of) vein A1, and similarly for cell A2...as indicated in Fig. 8.3 and Fig. 8.4 of Usinger (1956). The correct interpretation of cells A1 and A2 is important in interpreting the key in Usinger(1956).

For more info on this post, please see remarks under 1st image in series.

Images of this individual: tag all
Southern Oregon Fishfly - Orohermes crepusculus Southern Oregon Fishfly - Orohermes crepusculus Southern Oregon Fishfly - Orohermes crepusculus Southern Oregon Fishfly - Orohermes crepusculus Southern Oregon Fishfly - Orohermes crepusculus Southern Oregon Fishfly - Orohermes crepusculus Southern Oregon Fishfly - Orohermes crepusculus