©Slovenian Entomological Society, download unter www.biologiezentrum.at
LJUBLJANA, MAY 2002
Vol. 10, No. 1: 21-24
THE FEMALE OF CHAETOPTERYXIRENAE KRUŠNIK & MALICKY 1986
Gorazd URBANIČ* and Ciril KRUŠNIK2
University of Ljubljana, Biotehnical Faculty, Department of Biology, Ve^na pot 111, SI-1001 Ljubljana, Slovenia, e-mail:Gorazd.Urbanic@uni-lj.si National institute of Biology, Večna pot 111, SI-1001 Ljubljana, Slovenia, e-mail: Ciril.Krusnik@ uni-lj. si
Abstract - Pupae of the Slovenian endemic species Chaetopteryx irenae were recently collected near the type locality of the species. They were reared in the laboratory up to emergence. The female of Chaetopteryx irenae is described and figured for the first time. Information for its identification is given. In addition, some taxonomical, ecological and zoogeographical notes are added.
Key words: Trichoptera, Chaetopteryx irenae, female, Slovenia
Izvleček - OPIS SAMICE VRSTE CHAETOPTERYX IRENAE KRUŠNIK IN MALICKY 1986
Bube slovenske endemne vrste Chaetopteryx irenae smo nedavno nabrali blizu tipskega najdišča. V laboratoriju smo jih gojili do izletanja. Podan je opis in značilnosti za prepoznavanje samice ter tudi nekatere ekološke in zoogeografske značilnosti.
Ključne besede: Mladoletnice, Chaetopteryx irenae, samica, Slovenija
Introduction
In the revision of Chaetopteryx rugulosa Kolenati 1848 - group (Malicky et al., 1986) Chaetopteryx irenae Krusnik & Malicky was described. One single specimen
21
©Slovenian Entomological Society, download unterwww.biologiezkfitftiiWliPillologica slovenica, 10 (1), 2002
was collected by Krusnik at the Vrtice spring near Artvize in southwestern Slovenia (Fig. 1). At the end of 1980s the type locality of the species was enclosed and impounded for water supplies. In the next years it was visited several more times but no specimens were found. Thus, the species was included in the Red List of Endangered Trichoptera in Slovenia in the group "probably extinct species" (IUCN: Ex?) (Krusnik, 1992). Nevertheless, Krusnik and Urbanic (2000) included this species in the preliminary list of Slovenian Trichoptera.
In the autumn of 2000 the type locality of C. irenae and some adjacent streams were visited. Despite no adults, pupae with a typical Chaetopteryx case habitus were found in the stream Brsnica near Artvize, whereas at the type locality no specimens were collected. Pupae were brought to the laboratory and reared to emergence. The identification of emerged males showed specimens belonging to Chaetopteryx irenae. Among those collected one female was present and is described here.
Fig. 1: Distribution of C. irenae Krusnik & Malicky.
22
G. Urbanic and C. Krusnik: The female of Chaetoptery.x irenae Krusnik & Malicky 1986
Description of the female
Material examined: SW Slovenia, Brkini, stream Brsnica, Artvize, 18. 10. 2000, 1$, leg. & coll. G. Urbanic and C. Krusnik.
Female habitus similar to the typical Chaetopteryx rugulosa group habitus. Body light yellowish brown with dark brown tarsi and broad light brown wings. Wing veins and membranes covered with bristles. Length of anterior wings 8 mm. Spur formula 133. Genitalia (Fig. 2, a-c): anal tube short and broad with small lateral excision. Lateral processes of the anal tube relatively long. Ventral lip very short and with concave edge. The inner dorsal sclerites exceed the edge of the dorsal lip. The supragenital plate almost as long as ventral lip and slightly rounded.
Fig. 2: Female genitalia of C. irenae, a: lateral view, b: dorsal view, c: ventral view.
Discussion
Female of C. irenae is similar in colour to the female of C. goricensis, but with darker tarsi. Genitalia are very similar. In addition, description of C. irenae is made on one single specimen (Malicky et al. 1986), and great intra-species variability of species belonging to rugulosa group is also known (Malicky et al. 1986, Malicky
23
©Slovenian Entomological Society, download unter www.biologiezentrum.at
Acta entomologica slovenica, 10 (2), 2002
1996). However, new male specimens collected at the same locality confirmed C. irenae as a good species with low variability in described characters: large triangular upper appendices, lower appendices long with distal spine and concave ventral edge, aedeagus with lateral fingers, parameres short with two equally long bristles.
References
Krušnik, C., 1992: Rdeči seznam ogroženih mladoletnic (Insecta, Trichoptera) v
Sloveniji. Varstvo narave, 17: 105-108. Malicky, H., 1996: Das Problem der Allopatrischen Arten bei Europäischen
Köcherfliegen (Insecta: Trichoptera). Natura Croatica, 5: 11-23. Malicky, H., C. Krušnik, G. Moretti, S. Nogradi, 1986: Ein Beitrag zur Kenntnis der Chaetopteryx rugulosa Kolenati 1848 - Gruppe (Trichoptera, Limnephilidae). Entomofauna, 7: 1-27. Krušnik, C., G. Urbai^ič, 2000: Preliminary list of Slovenian Trichoptera. Posterpresentation, 10 International Symposium on Trichoptera, Potsdam.
Received / Prejeto: 14. 9. 2001
24