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Abstract
Clathrus archeri (Berk.) Dring, an alien saprotrophic fungus originating from Australia and New Zealand has been present in Europe for over 100 years. From its first observation in 1920 in France, it has spread all over Europe, and is among the better surveyed alien saprotrophic fungi with respect to its spread and distribution. Despite this, data about C. archeri in Croatia in the scientific literature are very scarce. To fill the current gap on the presence and distribution of C. archeri in Croatia, we collected reliable available data on its presence, analysed several environmental factors (climate, soil acidity, topography) on those localities, and developed habitat suitability models using Maxent software. We found out that the fungus has been present in Croatia for over 20 years, so we synthesized information on 25 observations, which were all but one placed in the Continental NATURA 2000 biogeographical region of the country. Localities were situated between 104 and 532 m a.s.l., with mean annual temperatures ranging from 8.1 to 10.9 °C, and annual precipitation ranging between 815 and 1620 mm. On all localities acid soil reactions were present with pH values below 6.8. Although the current number of observations is moderate, in terms of its spatial distribution we can consider C. archeri a widespread alien fungus in Croatia. Based on the habitat suitability models developed here, and data about its ecology from the literature, we can expect more and spatially broader observations of C. archeri in the future.
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Copyright (c) 2025 Sven Jelaska, Damjana Levačić

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References
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- Božac, R., 1984: Šest stotina gljiva naših krajeva (Six hundred mushrooms of our regions). Mladost, Zagreb.
- Brännhage, J., Gross, A., 2020: Factsheet Neomyceten. Tintenfischpilz und Roter Gitterling. Eidg. Forschungsanstalt WSL, Birmensdorf, 3 S.
- Davies, B. E., 1974: Loss-on-ignition as an estimate of soil matter. Soil Science of America. Proceedings, 38, 150‒151.
- Desprez-Loustau, M. L., Robin, C., Buée, M., Courtecuisse, R., Garbaye, J., Suffert, F., Sache, I., Rizzo, D. M., 2007: The fungal dimension of biological invasions. Trends in Ecology and Evolution 22(9), 472–480. https://doi.org/10.1016/j.tree.2007.04.005
- Desprez-Loustau, M. L., Courtecuisse, R., Robin, C., Husson, C., Moreau, P., Blancard, D., Selosse, M., Lung-Escarmant, B., Piou, D., Sache, I., 2010: Species diversity and drivers of spread of alien fungi (sensu lato) in Europe with a particular focus on France. Biological Invasions 12, 157–172. https://doi.org/10.1007/s10530-009-9439-y
- Didukh, Y. P., 2009: The Red Data Book of Ukraine Flora. Global consulting, Kyiv.
- GBIF.org, 2024: GBIF Occurrence Download. Retrieved April 24, 2024 from https://doi.org/10.15468/dl.6mreqj
- Giovanetti, M., Vuković, N., Jelaska, S. D., 2014: Australian acacias across eastern Adriatic – abundant but not aggressive. Periodicum Biologorum 116(3), 275–283.
- Gyosheva, M. M., Denchev, C. M., Dimitrova, E. G., Assyov, B., Petrova, D. R., Stoichev, G. T., 2006: Red List of fungi in Bul-garia. Mycologia Balcanica 3, 81‒87.
- Heluta, V. P., Zykova, M. O., Hayova, V. P., Prydiuk, M. P., Shevchenko, M. V., 2022: An update to the species list of fungi in the Red Data Book of Ukraine. Ukrainian Botanical Journal 79(3), 154–168. https://doi.org/10.15407/ukrbotj79.03.154
- iNaturalist.org, 2018: Devil's-Fingers (Clathrus archeri). Retrieved April 24, 2024 from https://www.inaturalist.org/observations/12907117
- Kranjčev, R., 2008: Velika polipovka, Čekinjava pločašica, Vijugavo-mesnata mirisnica (Devil’s fingers, Eyelash cup, White false truffle). Šumarski list 9–10, 492.
- Lohwag, K., 1948: Anthurus muellerianus Kalchbr., var. aseroëformis Ed. Fischer, ein neuer Pilz für Österreich. Österrei-chische Mykologische Gesellschaft. 20.
- Official Gazette, 1998–2002: Pravilnik o zaštiti gljiva (Ordinance on protection of fungi). NN 79/1998, NN 115/1998, NN 34/2002.
- Official Gazette, 2006: Pravilnik o proglašavanju divljih svojti zaštićenim i strogo zaštićenim (Ordinance on designation of wild taxa as protected or strictly protected). NN 7/2006.
- Parent, G. H., Thoen, D., 1986: État actuel de l’extension de Clathrus archeri (Berkeley) Dring (syn.: Anthurus archeri (Berk.) Ed. Fischer) en Europe et particulièrement en France et au BÉnÉlux. Bulletin trimestriel de la Société my-cologique de France 102(3), 237–272.
- Parent, G. H., Thoen, D., Calonge, F. D., 2000: Nouvelles données sur la répartition de Clathrus archeri en particulier dans l’Ouest et le Sud-Ouest de l’Europe. Bulletin trimestriel de la Société mycologique de France 116(3), 241–266.
- Phillips, S. J., Dudík, M., Schapire, R. E., 2024: Maxent software for modelling species niches and distributions (ver. 3.4.1). Retrieved April 24, 2024 from http://biodiversityinformatics.amnh.org/open_source/maxent/
- Pietras, M., Rudawska, M., Iszkuło, G., Kujawa, A., Leski, T., 2016: Distribution and molecular characterization of an alien fungus Clathrus archeri in Poland. Polish Journal of Environmental Studies 25(3), 1197–1204. https://doi.org/10.15244/pjoes/61230
- Pietras, M., Kolanowska, M., Selosse, M., 2021: Quo vadis? Historical distribution and impact of climate change on the worldwide distribution of the Australasian fungus Clathrus archeri (Phallales, Basidiomycota). Mycological Progress 20, 299–311. https://doi.org/10.1007/s11557-021-01669-w
- Poggio, L., de Sousa, L. M., Batjes, N. H., Heuvelink, G. B. M., Kempen, B., Ribeiro, E., Rossiter, D., 2021: SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty. SOIL 7(1), 217–240. https://doi.org/10.5194/soil-7-217-2021
- Stanič, I., 2024: Karta razširjenosti za Clathrus archeri. Podatkovna zbirka gliv Slovenije Boletus informaticus (Distribution map of Clathrus archeri. Data collection of Slovenian fungi Boletus informaticus). In: Ogris, N. (ed.), Web portal Boletus informaticus. Retrieved April 24, 2024 from https://boletusinformaticus.si/sre_karta.aspx?idorg=b59ac192-6ef6-4504-b0e6-234c1643c481
- Tănase, C., Pop, A., 2005: Red List of Romanian Macrofungi Species. In: Mihăilescu, S. (ed.), Bioplatform – Romanian Na-tional Platform for Biodiversity, 101‒107. Academiei Române, Bucureşti.
- Tkalčec, Z., Mešić, A., Antonić, O., 2005: Survey of the Gasteral Basidiomycota (Fungi) of Croatia. Natura Croatica 14(2), 99–120.
- Tkalčec, Z., Mešić, A., Matočec, N., Kušan, I., 2008: Crvena knjiga gljiva Hrvatske (Red Book of Croatian fungi). Ministry of Culture, State Institute for Nature Protection, Zagreb.
- Vischer, W., 1943: Ein für die Schweiz neuer Pilz Anthurus aseroeformis Ed. Fischer. Schweizerische Zeitschrift für Pilz-kunde 21, 17–20.
- Voglmayr, H., Krisai‐Greilhuber, I., 2002: Pilze. In: Essl, F., Rabitsch, W. (eds.), Neobiota in Österreich, 181–195. Umwelt-bundesamt, Vienna.
- Voglmayr, H., Schertler, A., Essl, F., Krisai Greilhuber, I., 2023: Alien and cryptogenic fungi and oomycetes in Austria: an annotated checklist (2nd edition). Biological Invasions 25, 27–38. https://doi.org/10.1007/s10530-022-02896-2
- Vrščaj, D., Erjavec, Š., Boh, A., Stanič, I., Piltaver, A., Seljak, G., Tratnik, B., Malovrh, B., Tortić, M., Čebulec, M., Šerod, S., Vrhovnik, F., Arko, J., Dolenc, F., Oblak, V., Vrhovec, B., Kavčič, Z., Seršen, J., Kavrečič, B., Bertosi, M., Hočevar, S., Haas, H., Ivanovič, A., Kaiser, S., Ujčič, M., Moser, M., Kosec, J., Koprek, F., Munda, A., Šmauc, A., Dolenc, A., Hudoklin, V., Mohorčič, V., Arzenšek, B., Kovač, A., Velikonja, P., Markovič, D., Kelhar, M., Podgornik, G., Lekše, J., Jurc, M., Goršak, B., Hudohmet, M., Jurc, D., Poličnik, M., Grebenc, T., Bertoncelj, F., Bračko, B., Bohte, T., Gerhold, A., Voss, W., Oblak, F., Kovše, J., Miller, O., Tkalčeč, Z., Došler, B., Fink, A., Pirnat, F., Kalchbrenner, K., Krajnc, J., Škulj, M., Hrovatič, M., Klemenčič, J., Jenko, V., Knoll, L., Tratnik, V., Dolšak, F., Kraigher, H., Kranjc, M., Breitenbach, J., Kotlaba,F., Petkovšek, M., Wettstein, R., Agerer, R., Loose A., Pec, M., Potokar, A., Beenken, L., Cortese, D., Černigoj, F., Klun, J., Oblak, N., Rozman, J., Schild, E., Šajn, V., Šarič, Zaletel, A., Arko, V., Babšek, J., Batič, F., Bech, W., Berden, J., Bračun, F., Celič, I., Cesar, M., Cetto, B., Doganoc, N., Godec, B., Goleš, L., von Höhnel, F. X. R., Hvastja, C., Jurc, B., Kocjančič, K., Korošec, V., Kovačič, F., Lindtner, V., Ljubič, F., Novak, J., Palfner, G., Pavlič, J., Perušek, R., Petkovšek, V., Pilat, A., Pouzar, Z., Rižnar, I., Rupel, M., Schinner, F., Sonc, M., Svrček, M., Toplak, I., 2004: Priloga Glive v Sloveniji (Contribution to Fungi in Slovenia). In: Jurc, D. (ed.), Seznam vrst in razširjenost makromicet v Sloveniji z analizo stopnje ogroženosti, 52–52. Gozdarski inštitut Slovenije, Ljubljana.
References
Bîrsan, C., Cojocariu, A., Cenuşă, E., 2014: Distribution and ecology of Clathrus archeri in Romania. Notulae Scientia Bio-logicae 6(3), 288–291. https://doi.org/10.15835/nsb639389
Bîrsan, C., Mardari, C., Copoţ, O., Tănase, C., 2021: Modelling the potential distribution and habitat suitability of the alien fungus Clathrus archeri in Romania. Botanica Serbica 45(2), 241–250. https://doi.org/10.2298/BOTSERB2102241B
Božac, R., 1984: Šest stotina gljiva naših krajeva (Six hundred mushrooms of our regions). Mladost, Zagreb.
Brännhage, J., Gross, A., 2020: Factsheet Neomyceten. Tintenfischpilz und Roter Gitterling. Eidg. Forschungsanstalt WSL, Birmensdorf, 3 S.
Davies, B. E., 1974: Loss-on-ignition as an estimate of soil matter. Soil Science of America. Proceedings, 38, 150‒151.
Desprez-Loustau, M. L., Robin, C., Buée, M., Courtecuisse, R., Garbaye, J., Suffert, F., Sache, I., Rizzo, D. M., 2007: The fungal dimension of biological invasions. Trends in Ecology and Evolution 22(9), 472–480. https://doi.org/10.1016/j.tree.2007.04.005
Desprez-Loustau, M. L., Courtecuisse, R., Robin, C., Husson, C., Moreau, P., Blancard, D., Selosse, M., Lung-Escarmant, B., Piou, D., Sache, I., 2010: Species diversity and drivers of spread of alien fungi (sensu lato) in Europe with a particular focus on France. Biological Invasions 12, 157–172. https://doi.org/10.1007/s10530-009-9439-y
Didukh, Y. P., 2009: The Red Data Book of Ukraine Flora. Global consulting, Kyiv.
GBIF.org, 2024: GBIF Occurrence Download. Retrieved April 24, 2024 from https://doi.org/10.15468/dl.6mreqj
Giovanetti, M., Vuković, N., Jelaska, S. D., 2014: Australian acacias across eastern Adriatic – abundant but not aggressive. Periodicum Biologorum 116(3), 275–283.
Gyosheva, M. M., Denchev, C. M., Dimitrova, E. G., Assyov, B., Petrova, D. R., Stoichev, G. T., 2006: Red List of fungi in Bul-garia. Mycologia Balcanica 3, 81‒87.
Heluta, V. P., Zykova, M. O., Hayova, V. P., Prydiuk, M. P., Shevchenko, M. V., 2022: An update to the species list of fungi in the Red Data Book of Ukraine. Ukrainian Botanical Journal 79(3), 154–168. https://doi.org/10.15407/ukrbotj79.03.154
iNaturalist.org, 2018: Devil's-Fingers (Clathrus archeri). Retrieved April 24, 2024 from https://www.inaturalist.org/observations/12907117
Kranjčev, R., 2008: Velika polipovka, Čekinjava pločašica, Vijugavo-mesnata mirisnica (Devil’s fingers, Eyelash cup, White false truffle). Šumarski list 9–10, 492.
Lohwag, K., 1948: Anthurus muellerianus Kalchbr., var. aseroëformis Ed. Fischer, ein neuer Pilz für Österreich. Österrei-chische Mykologische Gesellschaft. 20.
Official Gazette, 1998–2002: Pravilnik o zaštiti gljiva (Ordinance on protection of fungi). NN 79/1998, NN 115/1998, NN 34/2002.
Official Gazette, 2006: Pravilnik o proglašavanju divljih svojti zaštićenim i strogo zaštićenim (Ordinance on designation of wild taxa as protected or strictly protected). NN 7/2006.
Parent, G. H., Thoen, D., 1986: État actuel de l’extension de Clathrus archeri (Berkeley) Dring (syn.: Anthurus archeri (Berk.) Ed. Fischer) en Europe et particulièrement en France et au BÉnÉlux. Bulletin trimestriel de la Société my-cologique de France 102(3), 237–272.
Parent, G. H., Thoen, D., Calonge, F. D., 2000: Nouvelles données sur la répartition de Clathrus archeri en particulier dans l’Ouest et le Sud-Ouest de l’Europe. Bulletin trimestriel de la Société mycologique de France 116(3), 241–266.
Phillips, S. J., Dudík, M., Schapire, R. E., 2024: Maxent software for modelling species niches and distributions (ver. 3.4.1). Retrieved April 24, 2024 from http://biodiversityinformatics.amnh.org/open_source/maxent/
Pietras, M., Rudawska, M., Iszkuło, G., Kujawa, A., Leski, T., 2016: Distribution and molecular characterization of an alien fungus Clathrus archeri in Poland. Polish Journal of Environmental Studies 25(3), 1197–1204. https://doi.org/10.15244/pjoes/61230
Pietras, M., Kolanowska, M., Selosse, M., 2021: Quo vadis? Historical distribution and impact of climate change on the worldwide distribution of the Australasian fungus Clathrus archeri (Phallales, Basidiomycota). Mycological Progress 20, 299–311. https://doi.org/10.1007/s11557-021-01669-w
Poggio, L., de Sousa, L. M., Batjes, N. H., Heuvelink, G. B. M., Kempen, B., Ribeiro, E., Rossiter, D., 2021: SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty. SOIL 7(1), 217–240. https://doi.org/10.5194/soil-7-217-2021
Stanič, I., 2024: Karta razširjenosti za Clathrus archeri. Podatkovna zbirka gliv Slovenije Boletus informaticus (Distribution map of Clathrus archeri. Data collection of Slovenian fungi Boletus informaticus). In: Ogris, N. (ed.), Web portal Boletus informaticus. Retrieved April 24, 2024 from https://boletusinformaticus.si/sre_karta.aspx?idorg=b59ac192-6ef6-4504-b0e6-234c1643c481
Tănase, C., Pop, A., 2005: Red List of Romanian Macrofungi Species. In: Mihăilescu, S. (ed.), Bioplatform – Romanian Na-tional Platform for Biodiversity, 101‒107. Academiei Române, Bucureşti.
Tkalčec, Z., Mešić, A., Antonić, O., 2005: Survey of the Gasteral Basidiomycota (Fungi) of Croatia. Natura Croatica 14(2), 99–120.
Tkalčec, Z., Mešić, A., Matočec, N., Kušan, I., 2008: Crvena knjiga gljiva Hrvatske (Red Book of Croatian fungi). Ministry of Culture, State Institute for Nature Protection, Zagreb.
Vischer, W., 1943: Ein für die Schweiz neuer Pilz Anthurus aseroeformis Ed. Fischer. Schweizerische Zeitschrift für Pilz-kunde 21, 17–20.
Voglmayr, H., Krisai‐Greilhuber, I., 2002: Pilze. In: Essl, F., Rabitsch, W. (eds.), Neobiota in Österreich, 181–195. Umwelt-bundesamt, Vienna.
Voglmayr, H., Schertler, A., Essl, F., Krisai Greilhuber, I., 2023: Alien and cryptogenic fungi and oomycetes in Austria: an annotated checklist (2nd edition). Biological Invasions 25, 27–38. https://doi.org/10.1007/s10530-022-02896-2
Vrščaj, D., Erjavec, Š., Boh, A., Stanič, I., Piltaver, A., Seljak, G., Tratnik, B., Malovrh, B., Tortić, M., Čebulec, M., Šerod, S., Vrhovnik, F., Arko, J., Dolenc, F., Oblak, V., Vrhovec, B., Kavčič, Z., Seršen, J., Kavrečič, B., Bertosi, M., Hočevar, S., Haas, H., Ivanovič, A., Kaiser, S., Ujčič, M., Moser, M., Kosec, J., Koprek, F., Munda, A., Šmauc, A., Dolenc, A., Hudoklin, V., Mohorčič, V., Arzenšek, B., Kovač, A., Velikonja, P., Markovič, D., Kelhar, M., Podgornik, G., Lekše, J., Jurc, M., Goršak, B., Hudohmet, M., Jurc, D., Poličnik, M., Grebenc, T., Bertoncelj, F., Bračko, B., Bohte, T., Gerhold, A., Voss, W., Oblak, F., Kovše, J., Miller, O., Tkalčeč, Z., Došler, B., Fink, A., Pirnat, F., Kalchbrenner, K., Krajnc, J., Škulj, M., Hrovatič, M., Klemenčič, J., Jenko, V., Knoll, L., Tratnik, V., Dolšak, F., Kraigher, H., Kranjc, M., Breitenbach, J., Kotlaba,F., Petkovšek, M., Wettstein, R., Agerer, R., Loose A., Pec, M., Potokar, A., Beenken, L., Cortese, D., Černigoj, F., Klun, J., Oblak, N., Rozman, J., Schild, E., Šajn, V., Šarič, Zaletel, A., Arko, V., Babšek, J., Batič, F., Bech, W., Berden, J., Bračun, F., Celič, I., Cesar, M., Cetto, B., Doganoc, N., Godec, B., Goleš, L., von Höhnel, F. X. R., Hvastja, C., Jurc, B., Kocjančič, K., Korošec, V., Kovačič, F., Lindtner, V., Ljubič, F., Novak, J., Palfner, G., Pavlič, J., Perušek, R., Petkovšek, V., Pilat, A., Pouzar, Z., Rižnar, I., Rupel, M., Schinner, F., Sonc, M., Svrček, M., Toplak, I., 2004: Priloga Glive v Sloveniji (Contribution to Fungi in Slovenia). In: Jurc, D. (ed.), Seznam vrst in razširjenost makromicet v Sloveniji z analizo stopnje ogroženosti, 52–52. Gozdarski inštitut Slovenije, Ljubljana.