Isturgia limbaria roraria (Fabricius, 1776) Flamigni & Fiumi, 2020

Flamigni, Claudio & Fiumi, Gabriele, 2020, Observations on the Isturgia limbaria (Fabricius, 1775) / roraria (Fabricius, 1776) complex (Lepidoptera, Geometridae, Ennominae), Nota Lepidopterologica 43, pp. 227-251 : 241-242

publication ID	https://dx.doi.org/10.3897/nl.43.46559
persistent identifier	https://treatment.plazi.org/id/0E0019DB-18D8-52E7-9D79-7265DF739B53
treatment provided by	Nota Lepidopterologica by Pensoft
scientific name	Isturgia limbaria roraria (Fabricius, 1776)
status	stat. nov.

Treatment

Isturgia limbaria roraria (Fabricius, 1776) View in CoL stat. nov.

Phalaena roraria Fabricius, 1776, Genera Insect. 285, Europe.

Phalaena adspersaria Fabricius, 1787, Mantissa Insect. 2: 189, [Germany], [Saxony-Anhalt]: Halae Saxonum [Halle (Saale)].

Fidonia spartiaria Treitschke, 1827, Schmett. Eur. 6 (1): 270, [Germany]: river Rhine [patria falsa?]. The original description (upperside and underside) corresponds to roraria , but in the locality indicated only the taxon limbaria occurs.

Fidonia roraria ab. aequestriga Hirschke, 1910, Verh. zool.-bot. Ges. Wien 60: 416, [Czech Republic], Silesia: near Trop pau [Opava] [infrasubspecific: form without dark terminal fascia].

Fidonia roraria ab. nigrescens Preissecker, 1923, Verh. zool.-bot. Ges. Wien 72: (95), [Lower Austria]: Dunkelsteinerwald, near Ernsthof [infrasubspecific].

? Cleogene ostrogovichi Caradja, 1930, Bull. Sect. scient. Acad. roum. 13 (3): 52, [Romania], Siebenbürgen [Transylvania]: Cluj, [ Galişer Hill]. Synonym of roraria according to Rákosy et al. (2016), but it could instead be synonym of rablensis if the occurrence of this taxon in the Cluj-Napoca area was ascertained.

Isturgia roraria ab. stehliki Bretschneider, 1954, Ent. Z. 64: 41, Germany, [Saxony-Anhalt], Dessau [infrasubspecific: almost completely black form, obtained from a F2 generation, bred from normal-coloured roraria parents].

Material examined.

Germany: 1 ♂, Saxony-Anhalt: Bitterfeld, Marke, 0.5 km east the motorway exit Dessau-Süd, 85 m, 24.v.2012, J. Gelbrecht leg. (ZSM); 3 ♂ 3 ♀, Saxony-Anhalt: Dessau, Möst W, 80 m, 19.V.2016, 19.v.2016/31.iii-14.iv.2017 ex ovo, E. Friedrich leg. (RCEF) (digital images of both sides on Lepiforum); 3 ♂, 3 ♀, Bavaria: Spalt (and surroundings), 18.v.2004, 26.v.2005 ex ovo, 22.vi.2007 ex ovo, 3.v.2008 ex ovo, 6.v.11 ex ovo, 27.iv.2012 ex ovo, A. Zoglauer leg. (RCCF, RCCM); 1 ♂, Bavaria: Mittelfranken, Nürnberger Land, Leinburg, Wolfsgrube Ost, 405 m, 20.vii.2010, A. H. Segerer leg. (ZSM). Austria: 1 ♂, 1 ♀, Lower Austria: Pottenstein, 31.v.1930, 21.vi.1930, R. Kitschelt leg. (NHMW) (digital images of both sides on Lepiforum). Czech Republic: 1 ♂, Moravia: Vápenky, 13.v.2006 ex ovo, J. Uñčář leg. (RCCM); 1 ♂, Moravia: Bílé Karpaty [White Carpathians], Machová, 1996 ex ovo, E. Lohočka leg. (RCCM). Slovakia: 1 ♀, Handlová, iv-2003 ex ovo on Genista , I. Richter leg. (RCCM).

Colour images of specimens from Poland are shown by Blaik (2003) (variability of upperside), Blaik and Malkiewicz (2003) (upperside and underside) and on the website Lepidoptera Mundi ( 2019).

Diagnosis

(Figs 7 View Figures 3–12 , 12 View Figures 3–12 , 17 View Figures 13–17 , 22 View Figures 18–22 ). Ground colour of the upperside deep yellow or orange, scattered with dark vertical lines; the dark terminal fascia (when present) is generally wide; however, the upperside is often identical to that of the previous subspecies and the differentiation from it is possible only by examining the underside. On the underside fore- and hindwing with identical colour and pattern: ground colour orange-yellow or orange scattered with dark vertical stripes (a little more dense on the hindwings); hindwing without a trace of whitish radiating streaks (sometimes a streak of a slightly lighter yellow, for example in specimens from Poland and Slovakia).

On the upperside, the dark terminal fascia is variable: according to Povolný and Moucha (1957) in Slovakia most of the individuals from the Ore Mountains have this fascia less developed than those from Vihorlat Mountains and in the first locality it is absent in a high percentage of females (but also males). In Poland ( Blaik 2003) this fascia is wide and always present in the males (more or less distinct), almost always indistinct or absent in the females; specimens were collected in a locality with a large area of the forewing upperside without dark markings.

In the female genitalia signum large (1.2-1.4 mm). Bullae tympani without roundish lobe.

Distribution.

North-eastern and south-eastern Germany (cf. Skou and Sihvonen 2015: map on page 99), Austria ( Huemer 2013: Lower Austria), southern Poland, Czech Republic, Slovakia, north-eastern Hungary. For Romania, see the previous subspecies. Viidalepp (1996) attributes to roraria s. str. the populations from Ukraine, south-eastern Russia and southern Urals.

References

Figures

Figures 3 - 12. Upperside of males (3 - 7) and females (8 - 12). 3 a. I. l. limbaria ♂, Germany: North Rhine-Westphalia, Wuppertal. 3 b. I. l. limbaria ♂, Switzerland: Valais, district of Sierre, Val d'Anniviers. 3 c. I. l. limbaria ♂, Spain: Aragon, province of Huesca, Fanlo. 4 a. I. l. delimbaria ♂, France: Vaucluse, Gignac. 4 b. I. l. delimbaria f. pedemontaria ♂, Italy: Piedmont, Ligurian Apennines, Capanne Superiori di Marcarolo. 4 c. I. l. delimbaria ♂, Italy: Emilia-Romagna, Tuscan-Emilian Apennines, Bologna, Monte Pizzo. 5. I. l. anzascaria ♂, Italy: Piedmont, Monte Rosa, Macugnaga, under Alpe Bill. 6 a. I. l. rablensis ♂, Italy: Piedmont, province of Verbania-Cusio-Ossola, Valstrona, Campello Monti. 6 b. I. l. rablensis ♂, Italy: Trentino-Alto Adige / Veneto, Monte Baldo, Cima Valdritta. 6 c. I. l. rablensis ♂, Italy: Friuli-Venezia Giulia, Carnic Prealps, Barcis, Prescudin. 6 d. I. l. rablensis ♂, Italy: Friuli-Venezia Giulia, Julian Prealps, Matajur. 6 e. I. l. rablensis ♂, Macedonia: Baba Planina [Baba Mountain], Pelister, Golemo ezero [Large Lake]. 6 f. I. l. rablensis ♂, Bulgaria: Sofia, Vitosa [Vitosha]. 7 a. I. l. roraria ♂, Czech Republic: Moravia, Bile Karpaty [White Carpathians], Machova. 7 b. I. l. roraria ♂, Czech Republic: Moravia, Vapenky 7 c. I. l. roraria ♂, Germany: Bavaria, surroundings of Spalt. 8 a. I. l. limbaria ♀, Belgium: Comblain [- au-Pont]. 8 b. I. l. limbaria ♀, Switzerland: Valais, district of Sierre, Val d'Anniviers. 8 c. I. l. limbaria ♀, Spain: Aragon, province of Huesca, Fanlo. 9 a. I. l. delimbaria ♀, France: Alpes-Maritimes, Grasse above Gourdon. 9 b. I. l. delimbaria ♀, Italy: Emilia-Romagna, Tuscan-Emilian Apennines, Bologna, Monte Grande. 10. I. l. anzascaria ♀, Italy: Piedmont, Monte Rosa, Macugnaga, under Alpe Bill. 11 a. I. l. rablensis ♀, Italy: Piedmont, province of Verbania-Cusio-Ossola, Valstrona, Campello Monti. 11 b. I. l. rablensis ♀, Italy: Lombardy, Bergamasque Prealps, Camerata Cornello, towards Passo Grialeggio. 11 c. I. l. rablensis ♀, Italy: Trentino-Alto Adige, Brentonico, [Monte Baldo]. 11 d. I. l. rablensis ♀, Italy: Friuli-Venezia Giulia, Julian Alps, Jof Montasio. 11 e. I. l. rablensis ♀, Bulgaria: Sofia, Vitosa [Vitosha]. 12 a. I. l. roraria ♀, Slovakia: Handlova. 12 b. I. l. roraria ♀, Germany: Bavaria, surroundings of Spalt. 12 c. I. l. roraria ♀, Germany: Bavaria, Spalt.