Rhyacophila septentrionis McLachlan, 1865

Valladolid, María, Arauzo, Mercedes, Chertoprud, Mikhail V., Chvojka, Pavel, Czachorowski, Stanisław, Dorda, Beatriz A., Hinić, Jelena, Ibrahimi, Halil, Karaouzas, Ioannis, Krpač, Vladimir, Kučinić, Mladen, Lodovici, Omar, Salokannel, Juha, Stamenković, Valentina Slavevska & Stojanović, Katarina, 2021, The Rhyacophila fasciata Group in Europe: Rhyacophila fasciata Hagen 1859 and formerly synonymized species (Trichoptera: Rhyacophilidae), with new description of Rhyacophila fasciata and Rhyacophila septentrionis McLachlan 1865 (stat. prom.)., Zootaxa 4975 (1), pp. 1-57 : 15-16

Rhyacophila septentrionis McLachlan , status resurrectus

Rhyacophila septentrionis McLachlan, 1865: 157

Rhyacophila septentrionis McLachlan : McLachlan 1868: 305, 1879: 444; Klapálek 1893: 126–128; Silfvenius 1905: 146– 148; Ulmer 1909: 17, 220; Nielsen 1942: 337–358; Hickin 1954: 59–61; Mackereth 1954: 150–151; Ross 1956: 118; Fischer 1960: 131–136, 1971: 120–122 (and other references herein); Fotius-Jaboulet 1964: 1–13; Lepneva 1964: 220–227; Botosaneanu 1967: 291 (as synonym of R. fasciata Hagen ); Schmid 1970: 120 (as synonym of R. fasciata Hagen ); Tobias & Tobias 1981: 38–39 (as synonym of R. fasciata Hagen ).

Lect otype: 1 male NHMUK 012504718 ( Figs 3 , 31a ) .

Type locality: Near Longniddry & Aberlady, Scotland .

Other information: Captured 18/vi/1865, at a little stream running into the sea on the coast of the Firth of Forth, near Longniddry.

Description. According to McLachlan (1865), “Antennae testaceous, with indistinct paler annulations. Head, palpi and mesothorax pale brown; the former with scattered golden hairs. Anterior wings broad, the apex nearly elliptical, golden-grey, thickly reticulated with dark grey; dark greyish-fuscous spots round the apical margin, one at the termination of each apical sector; the pale dorsal blotch is ill defined, and is indicated by an irregular pale space, scarcely reticulated; a similar but still more indistinct paler space occupies the whole of the lower two-thirds of the apical portion of the wing; neuration fuscous. Posterior wings pale greyish, subhyaline; apical veins darker grey, sometimes margined with grey at their points of insertion in the apical margin. Legs testaceous; the tips of the anterior and intermediate tibiae externally fuscous; tibial spurs dark brown. Abdomen fuscous, ochreous beneath, testaceous at the apex above, and with testaceous appendices. In the male the superior lobe is short, rather attenuated at the base, but soon greately dilated, the apical portion being nearly orbicular ( McLachlan, 1879, pl. XLVI, Rh. septentrionis , fig 1) (herein Fig 31b ); app. sup. nearly concealed under the lobe, the external edge rounded, slightly excised in front (herein Fig 31b ); app. inf. rather short, the basal joint broad, with the sides parallel, the apical joint scarcely shorter than the basal and of equal breadth, the apex very obliquely truncated ( McLachlan, 1879, pl. XLVI, Rh. septentrionis fig 2); penis furnished above with a short broad dark chesnut-brown superior cover; lower sheaths bent slightly downwards (their direction varies in dead specimens) ( Fig 31c ), dark shining chestnut-brown, clear testaceous at the extreme base ( McLachlan, 1879, pl. XLVI, Rh. septentrionis fig 3). Expanse of fore-wings 12–13 lines”.

Figures

FIGURE 3. Lectotype of Rhyacophila septentrionis McLachlan 1865, in Entomology Collection of the Natural History Museum, London, United Kingdom (NHMUK, previously BMNH). Photo: Dr. Ben Price, Curator.

FIGURES 30–33. 30. Lectotype of Rhyacophila fasciata Hagen 1859 (male). 30a, thorax and right forewing (pinned); 30b, abdomen and male genitalia in cork-stoppered microvial (ethanol), detail. Photos: Museum of Comparative Zoology of Harvard University, Cambridge, MA, USA (MCZH). 31–33. Rhyacophila septentrionis MacLachlan 1865. 31, lectotype (male): 31a, specimen (pinned); 31b, apicodorsal lobe of segment IX and preanal appendages, dorsal view; 31c, detail of genitalia, posterior view. 32, female: 32a, cleared and mounted genitalia; 32b, original mounting preparation. 33, original mounting preparation of R. septentrionis male genitalia. Photos: Ben Price, Natural History Museum of United Kingdom (NHMUK).