Rhyacophila fasciata Hagen 1859

Valladolid, Maria, Karaouzas, Ioannis, Ibrahimi, Halil, Arauzo, Mercedes, Stamenković, Valentina Slavevska, Dorda, Beatriz A., Hinić, Jelena, Bilalli, Astrit, Musliu, Milaim & Rey, Isabel, 2022, The Rhyacophila fasciata Group in Europe: Rhyacophila macedonica Karaouzas Valladolid & Ibrahimi (n. sp.) from Greece, Kosovo, Republic of North Macedonia and Serbia (Trichoptera: Rhyacophilidae), Zootaxa 5125 (2), pp. 101-130 : 106-107

publication ID

https://doi.org/ 10.11646/zootaxa.5125.2.1

publication LSID

lsid:zoobank.org:pub:C053849B-3A81-47E5-9085-425A8986D0B9

DOI

https://doi.org/10.5281/zenodo.6424460

persistent identifier

https://treatment.plazi.org/id/03ED87E5-FFDC-5231-4385-45CD3673FC90

treatment provided by

Plazi

scientific name

Rhyacophila fasciata Hagen 1859
status

 

Rhyacophila fasciata Hagen 1859 View in CoL

Description of the imago. A complete description of the species is included in the publication by Valladolid et al. (2021). Here we describe small differences from the original description of R. fasciata found in male and female specimens from Kosovo.

Male body length: 8.06–10.68 mm ( = 9.44, n = 22); each forewing: 10.11–12.52 ( = 11.32, n = 22); each hind wing: 8.94–10.91 mm ( = 9.87, n =22).

Female body length: 8.92–12.99 mm ( = 10.75, n = 7); each forewing: 10.57–12.67 mm ( = 11.98, n = 7); each hind wing: 9.21–11.31 mm ( = 10.42, n = 7).

Colour: Specimens preserved in ethanol reddish brown dorsally, yellowish ventrally, spurs reddish, setae golden brown, females generally darker than males; small black or dark brown spots in dorsal area; in lateral view, some specimens with large black spots marking border between dorsal and ventral areas. Forewings ( Figs 8a, b View FIGURES 8, 9 ) dark with small pale spots, two short transversal dark bands (fasciae) in Kosovo specimens ( Fig. 8b View FIGURES 8, 9 ), pale in preserved specimens, darker in females, hind wings pale ( Fig. 8c View FIGURES 8, 9 ). In specimens from Kosovo ( Fig. 8b View FIGURES 8, 9 ), forewings each with dark thick pterostigma area on leading edge between apices of subcostal (Sc) and first radial (R 1) or second radial (R 2) veins, each hind wing with pale thick pterostigma area between apices of subcostal (Sc) and second radial (R 2) veins, but not reaching second radial veins in some specimens; each forewing hyaline in irregular or triangular zone connecting medial (M) and medio-cubital (m-cu) veins and in distal area (arculus) of second cubital vein (Cu 2); in each hind wing ( Fig. 8c View FIGURES 8, 9 ) proximal segment of medial veins and connection area (M 1-4) not conspicuous, second cubital (Cu 2) veins not conspicuous proximally, proximal portion of cubital vein (Cu) and distal portions of first cubital vein (Cu 1a1b) thicker.

Male genitalia ( Fig. 15 View FIGURES 14–17 ): Apical segment of each inferior appendage in lateral view ( Fig. 15a View FIGURES 14–17 ; Valladolid et al. 2021, fig. 12A) with basal and distal edges diverging, dorsal and ventral edges diverging, posterior edge slightly concave dorsally and slightly convex ventrally, ventral edge slightly concave; apicodorsal vertex slightly angular (~117°), apicoventral angle rounded, projecting as thick lobe tapering to apex.

Parameres in ventral view curved posteromesad in apical half ( Fig. 15c View FIGURES 14–17 ; Valladolid et al. 2021, fig. 12BV). In lateral view ( Fig. 15d View FIGURES 14–17 ; Valladolid et al. 2021, fig. 12BL) each constricted at short distance beyond base, dilated at middle (~38% as thick as length of paramere), with almost parallel posterodorsal and anteroventral margins in central area (S-shape), two files of long and thick spines on midventral margin, pointing outward (some Kosovo specimens with two files of sparse spines); midlateral surface covered by sparse fine spicules or setae, from middle anteroventral to posterodorsal edges and covering most of apex, absent in middle anteroventral and dorsal edges.

Aedeagus (phallicata) in lateral view ( Valladolid et al. 2021, fig. 12 CL) with anterodorsal margin concave and posterior corner of this concavity hooked anterad, posterior edge of aedeagus straight, apicoventral tip projected posterodorsad, subapically concave dorsally and convex ventrally.Ventral lobe of aedeagus triangular in ventral view ( Fig. 15c View FIGURES 14–17 ; Valladolid et al. 2021, fig. 12BV), lateral edges slightly convex; lateroventral lobes of phallus straight, posterior edges strongly convex, subapicolateral margins slightly convex ( Valladolid et al. 2021, fig. 12CD).

Apicodorsal lobe of segment IX slightly dilated subapicolaterally, almost round in dorsal view ( Fig. 15b View FIGURES 14–17 ; Valladolid et al. 2021, fig. 12DD), with apicomesal excision in some specimens; preanal appendages round, shorter than apicodorsal lobe. In ventral view ( Valladolid et al. 2021, fig. 12DV), apical band V-shaped, nearly as wide as long, non-sclerotized inside area with posteromesal excision, posterior edges rounded, anal sclerites triangular.

Female genitalia ( Fig. 17 View FIGURES 14–17 ): In lateral view ( Fig. 17L View FIGURES 14–17 , Valladolid et al. 2021, figs 13La; 13Lb-1, -2, -3), posterodorsal margin of segment VIII valves on each side irregular (in Kosovo specimens concave), with subdorsal projection, convex on ventral edge, posterolateral margin irregular, with 1 or 2 posterior projections, ventral projection more conspicuous, in some specimens slightly indented posteriorly, in Kosovo specimens only one ventral projection, rounded apically.

In dorsal view ( Fig. 17D View FIGURES 14–17 ; Valladolid et al. 2021, fig. 13Da), with indentation between segment VIII valves, and rounded apical and subapical corners, delimiting oval space, small projection in apical corner in some specimens.

In ventral view ( Fig. 17V View FIGURES 14–17 ; Valladolid et al. 2021, fig. 13V) segment VIII valves forming two elongate sclerites, narrowly separate basally, basal 1/4 of mesal edges parallel, distal 3/4 of mesal edges irregular, slightly concave, diverging; intersegmental membrane with pair of dark, ovoid or slightly elongate sclerites, ovoid in Kosovo specimens.

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